NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 SLDN-12D1Ax RoHS Compliant Rev.B Features Non-Isolated Wide Input voltage range (3Vdc-14.4Vdc) Power Good signal Cost efficient open frame design Remote On/Off Ability to sink and source current Overtemperature protection DOSA based Compliant to IPC-9592 (September 2008), Category 2, Class II Compliant to RoHS EU Directive 2002/95/EC Compatible in a Pb-free or SnPb reflow environment Output voltage programmable from 0.6Vdc to 5.5Vdc via external resistor. Digitally adjustable down to 0.45Vdc TM Digital interface through the PMBus protocol Tunable Loop Flexible output voltage sequencing EZ-SEQUENCE Fixed switching frequency with capability of external synchronization Output overcurrent protection (non-latching) Wide operating temperature range [-40°C to 85°C] UL60950-1 Recognized (UL/cUL) (Pending) ISO 9001 and ISO 14001 certified manufacturing facilities TM to op timize dynamic output voltage response Applications Distributed power architectures Servers and storage applications Intermediate bus voltage applications Networking equipment Telecommunications equipment Industrial equipment Description The SLDN-12D1Ax power modules are non-isolated dc-dc converters that can deliver up to 12A of output current. These modules operate over a wide range of input voltage (VIN = 3Vdc-14.4Vdc) and provide a precisely regulated output voltage from 0.45Vdc to 5.5Vdc, programmable via an external resistor and PMBus control. Features include a digital interface using the PMBus protocol, remote On/Off, adjustable output voltage, over current and overtemperature protection. The PMBus interface supports a range of commands to both control and TM monitor the module. The module also includes the Tunable Loop feature that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area. Part Selection Output Voltage Input Voltage 0.45 - 5.5 Vdc 3 - 14.4 Vdc Max. Output Current 12 A Max. Output Power 60W Typical Efficiency 95.4% Model Number Active High SLDN-12D1A0 Model Number Active Low SLDN-12D1AL Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 1 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Part Number Explanation S LDN – 12 D 1A 0 1 2 3 4 5 6 1---Surface mount 2---Series code 3---Output current (12A) 4--- Wide input voltage range (3-14.4V) 5--- With sequencing 6---Enable, active high, change “0” to “L” means active low Absolute Maximum Ratings Parameter Min Typ Max Unit Continuous Input Voltage -0.3 - 15 V Voltage on SEQ ,SYNC,VS+ terminal - - 7 V Voltage on CLK,DATA,SMBALERT terminal - - 3.6 V Operating Ambient Temperature -40 TA 85 C Storage Temperature -55 Tstg 125 C Notes Note: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Input Specifications Parameter Operating Input Voltage Min 3 Typ - Max 14.4 Unit V Input Current (full load) - - 9 A VIN=3V to 14.4V - 52 - mA VO,set = 0.6 Vdc - 85 - mA VO,set = 5 Vdc Input Stand-by Current - 6.5 - mA VIN = 12V, module disabled Input Reflected Ripple Current (pk-pk) - 400 - mA 5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= IOmax I t Inrush Current Transient - - 1 As Input Ripple Rejection (120Hz) - -55 - dB Input Current (no load) 2 Notes VIN = 12Vdc, IO = 0, module enabled 2 CAUTION: This converter is not internally fused. An input line fuse must be used in application. This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 15A. Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information. Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 2 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Output Specifications Parameter Min Typ Max Unit Output Voltage Set Point -1.0 - +1.0 %Vo,set Output Voltage -3.0 - +3.0 %Vo,set Output Voltage Range -25 0 +25 %Vo,set - 0.4 - %Vo,set 0.6 - 5.5 V - - 0.5 V VO ≥ 2.5V VO < 2.5V - - 10 10 mV mV VO ≥ 2.5V VO < 2.5V - - 0.4 5 %Vo,set mV VIN=VIN, min to VIN, max Temperature Regulation (Tref=TA, min to TA, max) - - 0.4 %Vo,set Tref=TA, min to TA, max Ripple and Noise (pk-pk) - 50 100 mV Ripple and Noise (rms) - 20 38 mV Output Short-Circuit Current - 0.92 - A Vo≤250mV, Hiccup Mode Output Capacitance2 ESR≥ 1 mΩ ESR≥0.15 mΩ ESR≥ 10 mΩ 22 22 22 - 47 1000 5000 uF uF uF Without the Tunable Loop TM With the Tunable Loop TM With the Tunable Loop Output Current 0 - 12 A In either sink or source mode Output Current Limit Inception - 130 - % Io,max - 1.1 - msec Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until VO = 10% of Vo, set ) Output Voltage Adjustment Step Size Adjustment Range Remote Sense Range Notes with 0.1% tolerance for external resistor used to set output voltage Over all operating input voltage, resistive load, and temperature conditions until end of life Some output voltages may not be possible depending on the input voltage – see Feature Descriptions Section Load Regulation IO=IO, min to IO, max Line Regulation Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state) Output voltage Rise time 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 22 μF ceramic capacitors) TM Current limit does not operate in sink mode - 700 - μsec Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo = 10% of Vo, set) - 3.1 - msec time for Vo to rise from 10% of VO, set to 90% of Vo, set Notes: 1. Some output voltages may not be possible depending on the input voltage. TM 2. External capacitors may require using the new Tunable Loop feature to ensure that the module is TM stable as well as getting the best transient response (See the Tunable Loop section for details). 3. Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 3 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 General Specifications Parameter Min Typ Max Unit - 76.4 86.0 89.9 92.2 93.6 95.4 - % % % % % % Switching Frequency - 600 - kHz Over Temperature Protection - 150 - C - VSEQ -Vo VSEQ -Vo 100 100 mV mV Notes Efficiency Vo=0.6V Vo=1.2V Vo=1.8V Vo=2.5V Vo=3.3V Vo=5.0V Tracking Accuracy Power-Up: 2V/ms Power-Down: 2V/ms PGOOD (Power Good) Overvoltage threshold for PGOOD ON Overvoltage threshold for PGOOD OFF Undervoltage threshold for PGOOD ON Undervoltage threshold for PGOOD OFF Pulldown resistance of PGOOD pin Sink current capability into PGOOD pin - Weight - MTBF 108 110 92 90 - 50 5 2.23 - %VO, set %VO, set %VO, set %VO, set Ω mA Vin= 12Vdc, TA=25°C Io=Io, max , Vo= Vo,set Vin, min to Vin, max; Io, min to Io, max, VSEQ < Vo Signal Interface Open Drain, Vsupply 5Vdc g 21,774,843 hours 0.48 x 0.48 x 0.335 12.2 x 12.2 x 8.5 - Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2 Method 1 Case 3 Dimensions Inches (L × W × H) Millimeters (L × W × H) Frequency Synchronization Synchronization Frequency Range 510 - 720 KHz High-Level Input Voltage 2.0 - - V Low-Level Input Voltage - - 0.4 V Input Current, SYNC - - 100 mA Minimum Pulse Width, SYNC 100 - - nS Minimum Setup/Hold Time, SYNC 100 - - nS Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 4 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Efficiency Data 85 95 90 85 Vin=3V 75 EFFICIENCY, (%) EFFICIENCY, (%) 80 70 Vin=12V Vin=14V 65 60 55 50 Vin=3V 80 75 Vin=14V Vin=12V 70 65 60 55 50 0 2 4 6 8 10 12 0 2 OUTPUT CURRENT, IO (A) 4 6 8 10 12 10 12 OUTPUT CURRENT, IO (A) Vo=0.6V Vo=1.2V 95 100 95 90 EFFICIENCY, (%) EFFICIENCY, (%)) Vin=3.5V 85 Vin=12V Vin=14V 80 75 70 90 Vin=4.5V 85 Vin=14V 80 75 70 0 2 4 6 8 10 12 0 2 OUTPUT CURRENT, IO (A) 100 95 95 Vin=14V EFFICIENCY, (%) 90 85 6 8 Vo=2.5V 100 Vin=4.5V 4 OUTPUT CURRENT, IO (A) Vo=1.8V EFFICIENCY, (%)) Vin=12V Vin=12V 80 75 70 90 Vin=7V Vin=14V Vin=12V 85 80 75 70 0 2 4 6 8 OUTPUT CURRENT, IO (A) Vo=3.3V 10 12 0 2 4 6 8 10 12 OUTPUT CURRENT, IO (A) Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 5 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Thermal Derating Curves 12 10 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 12 NC 8 0.5m/s (100LFM) Standard Part (85°C) 6 1.5m/s (300LFM) Ruggedized (D) Part (105°C) 4 1m/s (200LFM) 2 2m/s 2m/s (400LFM) (400LFM) 0 55 65 75 85 95 10 NC 0.5m/s (100LFM) 8 6 Standard Part (85 C) 4 2m/s (400LFM) 0 105 55 65 75 85 95 105 AMBIENT TEMPERATURE, TA OC Vo=0.6V Vo=1.2V 12 10 OUTPUT CURRENT, Io (A) 12 OUTPUT CURRENT, Io (A) 1.5m/s (300LFM) Ruggedized (D) Part (105°C) 2 AMBIENT TEMPERATURE, TA OC NC 0.5m/s (100LFM) 8 6 Standard Part (85°C) 4 1m/s (200LFM) Ruggedized (D) Part (105°C) 2 1.5m/s (300LFM) 2m/s (400LFM) 0 55 65 75 85 95 10 NC 0.5m/s (100LFM) 8 6 1m/s (200LFM) Standard Part (85°C) 4 1.5m/s (300LFM) 2m/s (400LFM Ruggedized (D) Part (105°C) 2 0 55 105 O 65 75 85 95 105 O AMBIENT TEMPERATURE, TA C AMBIENT TEMPERATURE, TA C Vo=1.8V Vo=2.5V 12 10 OUTPUT CURRENT, Io (A) 12 OUTPUT CURRENT, Io (A) 1m/s (200LFM) NC 0.5m/s (100LFM) 8 1m/s (200LFM) 6 Standard Part (85°C) 4 1.5m/s (300LFM) Ruggedized (D) Part (105°C) 2 2m/s (400LFM) 0 55 65 75 85 95 O AMBIENT TEMPERATURE, TA C Vo=3.3V 105 10 NC 0.5m/s (100LFM) 8 1m/s (200LFM) 6 1.5m/s (300LFM) Standard Part (85°C) 4 Ruggedized (D) Part (105°C) 2 2m/s (400LFM) 0 45 55 65 75 85 95 105 O AMBIENT TEMPERATURE, TA C Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 6 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Oct. 11,2012 Bel Power Inc., a subsidiary of Bel Fuse Inc. OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (20mV/div) Output ripple and Noise Waveforms TIME, t (1s/div) TIME, t (1s/div) Vo=1.2V, Io = Io,max OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (20mV/div) Vo=0.6V, Io = Io,max TIME, t (1s/div) TIME, t (1s/div) Vo=2.5V, Io = Io,max OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (20mV/div) Vo=1.8V, Io = Io,max TIME, t (1s/div) Vo=3.3V, Io = Io,max TIME, t (1s/div) Vo=5.0V, Io = Io,max Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 7 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 TIME, t (100s /div) Transient Response to Dynamic Load Change from 50% to100%. Vo=1.2V TIME, t (100s /div) Transient Response to Dynamic Load Change from 50% to100%. Vo=2.5V OUTPUT VOLTAGE VO (V) (50mV/div) OUTPUT VOLTAGE VO (V) (50mV/div) OUTPUT CURRENT, IO (A) (10Adiv) OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT CURRENT, IO (A) (10Adiv) TIME, t (100s /div) Transient Response to Dynamic Load Change from 50% to 100%. Vo=1.8V OUTPUT CURRENT, IO (A) (10Adiv) OUTPUT CURRENT, IO (A) (10Adiv) TIME, t (100s /div) Transient Response to Dynamic Load Change from 50% to 100%. Vo=0.6V TIME, t (100s /div) Transient Response to Dynamic Load Change from 50% to 100%. Vo=3.3V OUTPUT CURRENT, IO (A) (10Adiv) OUTPUT CURRENT, IO (A) (10Adiv) OUTPUT VOLTAGE VO (V) 5 mV/div) OUTPUT VOLTAGE VO (V) (10 mV/div) Transient Response Waveforms TIME, t (100s /div) Transient Response to Dynamic Load Change from 50% to 100%. Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 8 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs TIME, t (2 ms/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) VO (V) (1V/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=3.3V TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) VO (V) (500mV/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) VO (V) (500mV/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=0.6V TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) VO (V) (1V/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (200V/div) VO (V) (5V/div) TIME, t (2 ms/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) VO (V) (500mV/div) Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Startup Time TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 9 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Oct. 11,2012 TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=3.3V INPUT VOLTAGE VIN (V) (5V/div) OUTPUT VOLTAGE VO (V) (500mV/div) OUTPUT VOLTAGE VO (V) (500mV/div) INPUT VOLTAGE VIN (V) (5V/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.8V TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.2V INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (1V/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=0.60V INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (1V/div) Bel Power Inc., a subsidiary of Bel Fuse Inc. TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=2.5V INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (2V/div) INPUT VOLTAGE VIN (V) (5V/div) OUTPUT VOLTAGE VO (V) (200mV/div) Startup Time (continued) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 10 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Input Filtering The SLDN-12D1Ax module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 37 shows the input ripple voltage for various output voltages at 12A of load current with 2x22 µF or 3x22 µF ceramic capacitors and an input of 12V. Figure 37 250 2x22uF Ripple (mVp-p) 3x22uF 200 150 100 50 0.5 1.5 2.5 3.5 4.5 Output Voltage(Volts) Note: Input ripple voltage for various output voltages with 2x22 µF or 3x22 µF ceramic capacitors at the input (12A load). Input voltage is 12V. Output Filtering These modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 µF ceramic and 22 µF ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 38 provides output ripple information for different external capacitance values at various Vo and a full load current of 12A. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the TM module can be achieved by using the Tunable Loop feature described later in this data sheet. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 11 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Output Filtering (continued) Figure 38 60 1x22uF Ext Cap 1x47uF Ext Cap Ripple (mVp-p) 50 2x47uF Ext Cap 4x47uF Ext Cap 40 30 20 10 0 0.5 1.5 2.5 3.5 4.5 Output Voltage(Volts) Note: Output ripple voltage for various output voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF ceramic capacitors at the output (12A load). Input voltage is 12V. Safety Considerations For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805 Teil 1 + A11):2009-11; EN 60950-1:2006 + A11:2009-03. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a slow-blow fuse with a maximum rating of 15 A in the positive input lead. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 12 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Analog Feature Descriptions Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Active Low Active High Min - 0.2 Typ - Max 0.6 Unit V 2.0 - Vin,max V - 0.2 - 0.6 V 2.0 - Vin,max V Notes The remote on/off pin open, Unit on. The remote on/off pin open, Unit on. The SLDN-12D1Ax module can be turned ON and OFF either by using the ON/OFF pin (Analog interface) or through the PMBus interface (Digital). The module can be configured in a number of ways through the PMBus interface to react to the two ON/OFF inputs: Module ON/OFF can be controlled only through the analog interface (digital interface ON/OFF commands are ignored) Module ON/OFF can be controlled only through the PMBus interface (analog interface is ignored) Module ON/OFF can be controlled by either the analog or digital interface The default state of the module (as shipped from the factory) is to be controlled by the analog interface only. If the digital interface is to be enabled, or the module is to be controlled only through the digital interface, this change must be made through the PMBus. These changes can be made and written to non-volatile memory on the module so that it is remembered for subsequent use. Analog On/Off The SLDN-12D1Ax power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, (device code suffix “0” – see Ordering Information), the module turns ON during a logic High on the On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off option, (device code suffix “L” – see Ordering Information), the module turns OFF during logic High and ON during logic Low. The On/Off signal should be always referenced to ground. For either On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 39. When the external transistor Q2 is in the OFF state, the internal transistor Q1 is turned ON, and the internal PWM #Enable signal is pulled low causing the module to be ON. When transistor Q2 is turned ON, the On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is 20k. For negative logic On/Off modules, the circuit configuration is shown in Fig. 40. The On/Off pin should be pulled high with an external pull-up resistor (suggested value for the 3V to 14V input range is 20Kohms). When transistor Q2 is in the OFF state, the On/Off pin is pulled high, transistor Q1 is turned ON and the module is OFF. To turn the module ON, Q2 is turned ON pulling the On/Off pin low, turning transistor Q1 OFF resulting in the PWM Enable pin going high. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 13 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Digital On/Off Please see the Digital Feature Descriptions section. Figure 39 DLYNX MODULE +3.3V +VIN Rpullup I 10K ENABLE 22K ON/OFF Q1 + Q2 V ON/OFF _ 22 K GND Circuit configuration for using positive On/Off logic Figure 40 DLYNX MODULE +3.3V +VI N Rpu llup I 10 K ENABLE ON/OFF 22K Q1 + Q2 V ON/OFF _ 22K GND Circuit configuration for using negative On/Off logic Monotonic Start-up and Shutdown The SLDN-12D1Ax module has monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range. Startup into Pre-biased Output The SLDN-12D1Ax module can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 14 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Output Voltage Programming The output voltage of the module is programmable to any voltage from 0.6dc to 5.5Vdc by connecting a resistor between the Trim and SIG_GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 41. The Upper Limit curve shows that for output voltages lower than 1V, the input voltage must be lower than the maximum of 14.4V. The Lower Limit curve shows that for output voltages higher than 0.6V, the input voltage needs to be larger than the minimum of 3V. Figure 41 Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. Figure 42 VIN (+) VO(+) VS+ ON/OFF LOAD TRIM Rtrim SIG _GND VS- Circuit configuration for programming output voltage using an external resistor. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 15 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Output Voltage Programming(continued) Without an external resistor between Trim and SIG_GND pins, the output of the module will be 0.6Vdc.To calculate the value of the trim resistor, Rtrim for a desired output voltage, should be as per the following equation: 12 Rtrim k Vo 0 . 6 Rtrim is the external resistor in kΩ Vo is the desired output voltage. Table 1 provides Rtrim values required for some common output voltages. Table1 VO, set (V) 0.6 0.9 1.0 1.2 1.5 1.8 2.5 3.3 5.0 Rtrim (KΩ) Open 40 30 20 13.33 10 6.316 4.444 2.727 By using a ±0.5% tolerance trim resistor with a TC of ±100ppm, a set point tolerance of ±1.5% can be achieved as specified in the electrical specification. Remote Sense The SLDN-12D1Ax power modules has a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage between the sense pins (VS+ and VS-). The voltage drop between the sense pins and the VOUT and GND pins of the module should not exceed 0.5V. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 16 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Analog Voltage Margining Output voltage margining can be implemented in the SLIN-12E2Ax modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. Figure 43 Vo Rmargin-down MODULE Q2 Trim Rmargin-up Rtrim Q1 GND Circuit Configuration for margining Output voltage Digital Output Voltage Margining Please see the Digital Feature Descriptions section. Output Voltage Sequencing The SLDN-12D1Ax module includes a sequencing feature, EZ-SEQUENCE that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, leave it unconnected. The voltage applied to the SEQ pin should be scaled down by the same ratio as used to scale the output voltage down to the reference voltage of the module. This is accomplished by an external resistive divider connected across the sequencing voltage before it is fed to the SEQ pin as shown in Fig. 44. In addition, a small capacitor (suggested value 100pF) should be connected across the lower resistor R1. For all Bel modules, the minimum recommended delay between the ON/OFF signal and the sequencing signal is 10ms to ensure that the module output is ramped up according to the sequencing signal. This ensures that the module soft-start routine is completed before the sequencing signal is allowed to ramp up . Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 17 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Output Voltage Sequencing (continued) Figure 44 DLynx Module V SEQ 20K SEQ R1=Rtrim 100 pF SIG_GND Circuit showing connection of the sequencing signal to the SEQ pin When the scaled down sequencing voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the sequencing voltage must be set higher than the set-point voltage of the module. The output voltage follows the sequencing voltage on a one-to-one basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on The SEQ pin. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. Note that in all of modules, the PMBus Output Undervoltage Fault will be tripped when sequencing is employed. This will be detected using the STATUS_WORD and STATUS_VOUT PMBus commands. In addition, the SMBALERT# signal will be asserted low as occurs for all faults and warnings. To avoid the module shutting down due to the Output Undervoltage Fault, the module must be set to continue operation without interruption as the response to this fault (see the description of the PMBus command VOUT_UV_FAULT_RESPONSE for additional information). Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. Digital Adjustable Overcurrent Warning Please see the Digital Feature Descriptions section. Overtemperature Protection To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shut o down if the overtemperature threshold of 150 C(typ) is exceeded at the thermal reference point Tref .Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 18 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Digital Temperature Status via PMBus Please see the Digital Feature Descriptions section. Digitally Adjustable Output Over and Under Voltage Protection Please see the Digital Feature Descriptions section. Input Undervoltage Lockout At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. Digitally Adjustable Input Undervoltage Lockout Please see the Digital Feature Descriptions section. Digitally Adjustable Power Good Thresholds Please see the Digital Feature Descriptions section. Synchronization The SLDN-12D1Ax module switching frequency can be synchronized to a signal with an external frequency within a specified range. Synchronization can be done by using the external signal applied to the SYNC pin of the module as shown in Fig. 45, with the converter being synchronized by the rising edge of the external signal. The Electrical Specifications table specifies the requirements of the external SYNC signal. If the SYNC pin is not used, the module should free run at the default switching frequency. If synchronization is not being used, connect the SYNC pin to GND. Figure 45 External source connections to synchronize switching frequency of the module. Measuring Output Current, Output Voltage and Input Voltage Please see the Digital Feature Descriptions section. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 19 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Dual Layout Identical dimensions and pin layout of modules permit migration from one to the other without needing to change the layout. To support this, 2 separate Trim Resistor locations have to be provided in the layout. As shown in Fig. 46, for the digital modules, the resistor is connected between the TRIM pad and SGND and in the case of the analog module it is connected between TRIM and GND. Figure 46 MODULE TRIM (PVX012 / PDT012) Rtrim1 for Digital Rtrim2 for Analog SIG_GND GND(Pin 7) Connections to support either Analog or Digital module on the same layout. Tunable LoopTM TM The SLDN-12D1Ax module has a feature that optimizes transient response of the module called Tunable Loop . External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Figure 38) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. TM The Tunable Loop allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C between the VS+ and TRIM pins of the module, as shown in Fig. 47. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module. Figure 47 VOUT VS+ RTune MODULE CO CTune TRIM RTrim SIG_GND GND Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 20 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Tunable LoopTM(continued) Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Table 2. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting R TUNE and CTUNE according to Table 2 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 6A to 12A step change (50% of full load), with an input voltage of 12V. Please contact your Bel Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values. Table 2 Co 1x47F 2x47F 4x47F 6x47F RTUNE 330 330 330 330 220 180 CTUNE 100pF 560pF 1500pF 2200pF 10nF 6800pF 10x47F 20x47F General recommended values of of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations. Table 3 Vo Co 5V 3.3V 5x47F RTUNE 330 CTUNE 1500pF 99mV V 2.5V 1x47F + 3x47F + 330F 330F Polymer Polymer 330 270 2700pF 58mV 3300pF 47mV 1.8V 1x47F + 2x330F Polymer 270 5600pF 34mV 1.2V 0.6V 1x47F + 3x47F + 3x330F 6x330F Polymer Polymer 220 180 10nF 24mV 47nF 12mV Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 6A step load with Vin=12V. Note: The capacitors used in the Tunable Loop tables are 47 μF/3 mΩ ESR ceramic and 330 μF/12 mΩ ESR polymer capacitors. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 21 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Digital Feature Descriptions PMBus Interface Capability The SLDN-12D1Ax power modules have a PMBus interface that supports both communication and control. The PMBus Power Management Protocol Specification can be obtained from www.pmbus.org. The modules support a subset of version 1.1 of the specification (see Table 6 for a list of the specific commands supported). Most module parameters can be programmed using PMBus and stored as defaults for later use. All communication over the module PMBus interface must support the Packet Error Checking (PEC) scheme. The PMBus master must generate the correct PEC byte for all transactions, and check the PEC byte returned by the module. The module also supports the SMBALERT response protocol whereby the module can alert the bus master if it wants to talk. For more information on the SMBus alert response protocol, see the System Management Bus (SMBus) specification. The module has non-volatile memory that is used to store configuration settings. Not all settings programmed into the device are automatically saved into this non-volatile memory, only those specifically identified as capable of being stored can be saved (see Table 6 for which command parameters can be saved to non-volatile storage). PMBus Data Format For commands that set thresholds, voltages or report such quantities, the module supports the “Linear” data format among the three data formats supported by PMBus. The Linear Data Format is a two byte value with an 11-bit, two’s complement mantissa and a 5-bit, two’s complement exponent. The format of the two data bytes is shown below: Data Byte High 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Exponent MSB Data Byte Low Mantissa MSB The value is of the number is then given by Value = Mantissa x 2 Exponent PMBus Addressing The SLDN-12D1Ax modules can be addressed through the PMBus using a device address. The module has 64 possible addresses (0 to 63 in decimal) which can be set using resistors connected from the ADDR0 and ADDR1 pins to SIG_GND. Note that some of these addresses (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 12, 40, 44, 45, 55 in decimal) are reserved according to the SMBus specifications and may not be useable. The address is set in the form of two octal (0 to 7) digits, with each pin setting one digit. The ADDR1 pin sets the high order digit and ADDR0 sets the low order digit. The resistor values suggested for each digit are shown in Table 4 (1% tolerance resistors are recommended). Note that if either address resistor value is outside the range specified in Table 4, the module will respond to address 127. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 22 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 PMBus Addressing(continued) Table 4 Digit 0 1 2 3 4 5 6 7 Resistor Value (KΩ) 10 15.4 23.7 36.5 54.9 84.5 130 200 2 The user must know which I C addresses are reserved in a system for special functions and set the address of the module to avoid interfering with other system operations. Both 100kHz and 400kHz bus speeds are supported by the module. Connection for the PMBus interface should follow the High Power DC specifications given in section 3.1.3 in the SMBus specification V2.0 for the 400kHz bus speed or the Low Power DC specifications in section 3.1.2. The complete SMBus specification is available from the SMBus web site,smbus.org. Figure 48 ADDR1 ADDR0 RADDR0 RADDR1 SIG_GND Circuit showing connection of resistors used to set the PMBus address of the module. PMBus Enabled On/Off The SLDN-12D1Ax module can also be turned on and off via the PMBus interface. The OPERATION command is used to actually turn the module on and off via the PMBus, while the ON_OFF_CONFIG command configures the combination of analog ON/OFF pin input and PMBus commands needed to turn the module on and off. Bit [7] in the OPERATION command data byte enables the module, with the following functions: 0 : Output is disabled 1 : Output is enabled Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 23 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 PMBus Enabled On/Of(continued) This module uses the lower five bits of the ON_OFF_CONFIG data byte to set various ON/OFF options as follows: Access Function Default Value 4 r/w PU 1 3 2 1 0 r/w r/w r/w r CMD CPR POL CPA 0 1 1 1 PU: Sets the default to either operate any time input power is present or for the ON/OFF to be controlled by the analog ON/OFF input and the PMBus OPERATION command. This bit is used together with the CP, CMD and ON bits to determine startup. Bit Value 0 1 Action Module powers up any time power is present regardless of state of the analog ON/OFF pin Module does not power up until commanded by the analog ON/OFF pin and the OPERATION command as programmed in bits [2:0] of the ON_OFF_CONFIG register. CMD: The CMD bit controls how the device responds to the OPERATION command. Bit Value 0 1 Action Module ignores the ON bit in the OPERATION command Module responds to the ON bit in the OPERATION command CPR: Sets the response of the analog ON/OFF pin. This bit is used together with the CMD, PU and ON bits to determine startup. Bit Value 0 1 Action Module ignores the analog ON/OFF pin, i.e. ON/OFF is only controlled through the PMBUS via the OPERATION command Module requires the analog ON/OFF pin to be asserted to start the unit Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 24 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 PMBus Adjustable Soft Start Rise Time The soft start rise time can be adjusted in the module via PMBus. When setting this parameter, make sure that the charging current for output capacitors can be delivered by the module in addition to any load current to avoid nuisance tripping of the overcurrent protection circuitry during startup. The TON_RISE command sets the rise time in ms, and allows choosing soft start times between 600μs and 9ms, with possible values listed in Table 5. Note that the exponent is fixed at -4 (decimal) and the upper two bits of the mantissa are also fixed at 0. Table 5 Rise Time 600μs 900μs 1.2ms 1.8ms 2.7ms 4.2ms 6.0ms 9.0ms Exponent Mantissa 11100 11100 11100 11100 11100 11100 11100 11100 00000001010 00000001110 00000010011 00000011101 00000101011 00001000011 00001100000 00010010000 Output Voltage Adjustment Using the PMBus The VOUT_SCALE_LOOP parameter is important for a number of PMBus commands related to output voltage trimming, margining, over/under voltage protection and the PGOOD thresholds. The output voltage of the module is set as the combination of the voltage divider formed by RTrim and a 20kΩ upper divider resistor inside the module, and the internal reference voltage of the module. The reference voltage VREF is nominally set at 600mV, and the output regulation voltage is then given by 20000 RTrim VOUT VREF RTrim Hence the SLDN-12D1Ax module output voltage is dependent on the value of RTrim which is connected external to the module. The information on the output voltage divider ratio is conveyed to the module through the VOUT_SCALE_LOOP parameter which is calculated as follows: VOUT _ SCALE _ LOOP RTrim 20000 RTrim Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 25 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Output Voltage Adjustment Using the PMBus(continued) The VOUT_SCALE_LOOP parameter is specified using the “Linear” format and two bytes. The upper five bits [7:3] of the high byte are used to set the exponent which is fixed at –9 (decimal). The remaining three bits of the high byte [2:0] and the eight bits of the lower byte are used for the mantissa. The default value of the mantissa is 00100000000 corresponding to 256 (decimal), corresponding to a divider ratio of 0.5. The maximum value of the mantissa is 512 corresponding to a divider ratio of 1. Note that the resolution of the VOUT_SCALE_LOOP command is 0.2%. When PMBus commands are used to trim or margin the output voltage, the value of VREF is what is changed inside the module, which in turn changes the regulated output voltage of the module. The nominal output voltage of the module can be adjusted with a minimum step size of 0.4% over a ±25% range from nominal using the VOUT_TRIM command over the PMBus. The VOUT_TRIM command is used to apply a fixed offset voltage to the output voltage command value using the “Linear” mode with the exponent fixed at –10 (decimal). The value of the offset voltage is given by VOUT ( offset ) VOUT _ TRIM 2 10 This offset voltage is added to the voltage set through the divider ratio and nominal VREF to produce the trimmed output voltage. The valid range in two’s complement for this command is –4000h to 3999h. The high order two bits of the high byte must both be either 0 or 1. If a value outside of the +/-25% adjustment range is given with this command, the module will set it’s output voltage to the nominal value (as if VOUT_TRIM had been set to 0), assert SMBALRT#, set the CML bit in STATUS_BYTE and the invalid data bit in STATUS_CML.. Output Voltage Margining Using the PMBus The SLDN-12D1Ax module can also have its output voltage margined via PMBus commands. The command VOUT_MARGIN_HIGH sets the margin high voltage, while the command VOUT_MARGIN_LOW sets the margin low voltage. Both the VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands use the “Linear” mode with the exponent fixed at –10 (decimal). Two bytes are used for the mantissa with the upper bit [7] of the high byte fixed at 0. The actual margined output voltage is a combination of the VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW and the VOUT_TRIM values as shown below. VOUT ( MH ) (VOUT _ MARGIN _ HIGH VOUT _ TRIM ) 210 VOUT ( ML) (VOUT _ MARGIN _ LOW VOUT _ TRIM ) 210 Note that the sum of the margin and trim voltages cannot be outside the ±25% window around the nominal output voltage. The data associated with VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW can be stored to nonvolatile memory using the STORE_DEFAULT_ALL command. The module is commanded to go to the margined high or low voltages using the OPERATION command. Bits [5:2] are used to enable margining as follows: 00XX : 0101 : 0110 : 1001 : 1010 : Margin Off Margin Low (Ignore Fault) Margin Low (Act on Fault) Margin High (Ignore Fault) Margin High (Act on Fault) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 26 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 PMBus Adjustable Overcurrent Warning The SLDN-12D1Ax module can provide an overcurrent warning via the PMBus. The threshold for the overcurrent warning can be set using the parameter IOUT_OC_WARN_LIMIT. This command uses the “Linear” data format with a two byte data word where the upper five bits [7:3] of the high byte represent the exponent and the remaining three bits of the high byte [2: ent the mantissa. The exponent is fixed at –1 (decimal). The upper five bits of the mantissa are fixed at 0 while the lower six bits are programmable with a default value of 13.5 (decimal). The resolution of this warning limit is 500mA. The value of the IOUT_OC_WARN_LIMIT can be stored to nonvolatile memory using the STORE_DEFAULT_ALL0] and the eight bits in the low byte repres command. Temperature Status via PMBus The SLDN-12D1Ax module can provide information related to temperature of the module through the STATUS_TEMPERATURE command. The command returns information about whether the pre-set over temperature fault threshold and/or the warning threshold have been exceeded. PMBus Adjustable Output Over and Under Voltage Protection The SLDN-12D1Ax module has output over and under voltage protection capability. The PMBus command VOUT_OV_FAULT_LIMIT is used to set the output over voltage threshold from four possible values: 108%, 110%, 112% or 115% of the commanded output voltage. The command VOUT_UV_FAULT_LIMIT sets the threshold that causes an output under voltage fault and can also be selected from four possible values: 92%, 90%, 88% or 85%. The default values are 112% and 88% of commanded output voltage. Both commands use two data bytes formatted as two’s complement binary integers. The “Linear” mode is used with the exponent fixed to –10 (decimal) and the effective over or under voltage trip points given by: VOUT (OV _ REQ) (VOUT _ OV _ FAULT _ LIMIT ) 2 10 VOUT (UV _ REQ) (VOUT _ UV _ FAULT _ LIMIT ) 2 10 Values within the supported range for over and undervoltage detection thresholds will be set to the nearest fixed percentage. Note that the correct value for VOUT_SCALE_LOOP must be set in the module for the correct over or under voltage trip points to be calculated. In addition to adjustable output voltage protection, the 12A module can also be programmed for the response to the fault. The VOUT_OV_FAULT RESPONSE and VOUT_UV_FAULT_RESPONSE commands specify the response to the fault. Both these commands use a single data byte with the possible options as shown below. 1. Continue operation without interruption (Bits [7:6] = 00, Bits [5:3] = xxx) 2. Continue for four switching cycles and then shut down if the fault is still present, followed by no restart or continuous restart (Bits [7:6] = 01, Bits [5:3] = 000 means no restart, Bits [5:3] = 111 means continuous restart) 3. Immediate shut down followed by no restart or continuous restart (Bits [7:6] = 10, Bits [5:3] = 000 means no restart, Bits [5:3] = 111 means continuous restart). 4. Module output is disabled when the fault is present and the output is enabled when the fault no longer exists (Bits [7:6] = 11, Bits [5:3] = xxx). Note that separate response choices are possible for output over voltage or under voltage faults. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 27 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 PMBus Adjustable Input Undervoltage Lockout The SLDN-12D1Ax module allows adjustment of the input under voltage lockout and hysteresis. The command VIN_ON allows setting the input voltage turn on threshold, while the VIN_OFF command sets the input voltage turn off threshold. For the VIN_ON command, possible values are 2.75V, and 3V to 14V in 0.5V steps. For the VIN_OFF command, possible values are 2.5V to 14V in 0.5V steps. If other values are entered for either command, they will be mapped to the closest of the allowed values. Both the VIN_ON and VIN_OFF commands use the “Linear” format with two data bytes. The upper five bits represent the exponent (fixed at -2) and the remaining 11 bits represent the mantissa. For the mantissa, the four most significant bits are fixed at 0. Power Good The SLDN-12D1Ax module provides a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going outside the specified thresholds. The PGOOD thresholds are user selectable via the PMBus (the default values are as shown in the Feature Specifications Section). Each threshold is set up symmetrically above and below the nominal value. The POWER_GOOD_ON command sets the output voltage level above which PGOOD is asserted (lower threshold). For example, with a 1.2V nominal output voltage, the POWER_GOOD_ON threshold can set the lower threshold to 1.14 or 1.1V. Doing this will automatically set the upper thresholds to 1.26 or 1.3V. The POWER_GOOD_OFF command sets the level below which the PGOOD command is de-asserted. This command also sets two thresholds symmetrically placed around the nominal output voltage. Normally, the POWER_GOOD_ON threshold is set higher than the POWER_GOOD_OFF threshold. Both POWER_GOOD_ON and POWER_GOOD_OFF commands use the “Linear” format with the exponent fixed at –10 (decimal). The two thresholds are given by VOUT ( PGOOD _ ON ) ( POWER _ GOOD _ ON ) 2 10 VOUT ( PGOOD _ OFF ) ( POWER _ GOOD _ OFF ) 2 10 Both commands use two data bytes with bit [7] of the high byte fixed at 0, while the remaining bits are r/w and used to set the mantissa using two’s complement representation. Both commands also use the VOUT_SCALE_LOOP parameter so it must be set correctly. The default value of POWER_GOOD_ON is set at 1.1035V and that of the POWER_GOOD_OFF is set at 1.08V. The values associated with these commands can be stored in non-volatile memory using the STORE_DEFAULT_ALL command. The PGOOD terminal can be connected through a pullup resistor(suggested value 100 K) to a source of 5VDC or lower. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 28 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Measurement of Output Current, Output Voltage and Input Voltage The SLDN-12D1Ax module is capable of measuring key module parameters such as output current and voltage and input voltage and providing this information through the PMBus interface. Roughly every 200μs, the module makes 16 measurements each of output current, voltage and input voltage. Average values of of these 16 measurements are then calculated and placed in the appropriate registers. The values in the registers can then be read using the PMBus interface. Measuring Output Current Using the PMBus The SLDN-12D1Ax module measures current by using the inductor winding resistance as a current sense element. The inductor winding resistance is then the current gain factor used to scale the measured voltage into a current reading. This gain factor is the argument of the IOUT_CAL_GAIN command, and consists of two bytes in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –15 (decimal). The remaining 11 bits in two’s complement binary format represent the mantissa. During manufacture, each module is calibrated by measuring and storing the current gain factor into non-volatile storage. The current measurement accuracy is also improved by each module being calibrated during manufacture with the offset in the current reading. The IOUT_CAL_OFFSET command is used to store and read the current offset. The argument for this command consists of two bytes composed of a 5-bit exponent (fixed at -4d) and a 11-bit mantissa. This command has a resolution of 62.5mA and a range of -4000mA to +3937.5mA. The READ_IOUT command provides module average output current information. This command only supports positive or current sourced from the module. If the converter is sinking current a reading of 0 is provided. The READ_IOUT command returns two bytes of data in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –4 (decimal). The remaining 11 bits in two’s complement binary format represent the mantissa with the 11th bit fixed at 0 since only positive numbers are considered valid. Note that the current reading provided by the module is not corrected for temperature. The temperature corrected current reading for module temperature TModule can be estimated using the following equation where IOUT_CORR is the temperature corrected value of the current measurement, IREAD_OUT is the module current measurement value, TIND is the temperature of the inductor winding on the module. Since it may be difficult to measure TIND, it may be approximated by an estimate of the module temperature. Measuring Output Voltage Using the PMBus The SLDN-12D1Ax module can provide output voltage information using the READ_VOUT command. The command returns two bytes of data all representing the mantissa while the exponent is fixed at -10 (decimal). During manufacture of the module, offset and gain correction values are written into the non-volatile memory of the module. The command VOUT_CAL_OFFSET can be used to read and/or write the offset (two bytes consisting of a 16-bit mantissa in two’s complement format) while the exponent is always fixed at -10 (decimal). The allowed range for this offset correction is -125 to 124mV. The command VOUT_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125V to +0.121V, with a resolution of 0.004V. The corrected output voltage reading is then given by: VOUT ( Final) [VOUT ( Initial) (1 VOUT _ CAL _ GAIN)] VOUT _ CAL _ OFFSET Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 29 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Measuring Input Voltage Using the PMBus The SLDN-12D1Ax module can provide output voltage information using the READ_VIN command. The command returns two bytes of data in the linear format. The upper five bits [7:3] of the high data form the two’s complement representation of the mantissa which is fixed at –5 (decimal). The remaining 11 bits are used for th two’s complement representation of the mantissa, with the 11 bit fixed at zero since only positive numbers are valid. During module manufacture, offset and gain correction values are written into the non-volatile memory of the module. The command VIN_CAL_OFFSET can be used to read and/or write the offset - two bytes consisting of a five-bit exponent (fixed at -5) and a11-bit mantissa in two’s complement format. The allowed range for this offset correction is -2 to 1.968V, and the resolution is 32mV. The command VIN_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125V to +0.121V, with a resolution of 0.004V. The corrected output voltage reading is then given by: VIN ( Final) [VIN ( Initial) (1 VIN _ CAL _ GAIN)] VIN _ CAL _ OFFSET Reading the Status of the Module using the PMBus The SLDN-12D1Ax module supports a number of status information commands implemented in PMBus. However, not all features are supported in these commands. A 1 in the bit position indicates the fault that is flagged. STATUS_BYTE : Returns one byte of information with a summary of the most critical device faults. Bit Position 7 6 5 4 3 2 1 0 Flag X OFF VOUT Overvoltage IOUT Overcurrent VIN Undervoltage Temperature CML (Comm. Memory Fault) None of the above Default Value 0 0 0 0 0 0 0 0 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 30 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Reading the Status of the Module using the PMBus(continued) STATUS_WORD : Returns two bytes of information with a summary of the module’s fault/warning conditions. Bit Position 7 6 5 4 3 2 1 0 Bit Position 7 6 5 4 3 2 1 0 Flag X OFF VOUT Overvoltage IOUT Overcurrent VIN Undervoltage Temperature CML (Comm. Memory Fault) None of the above Flag VOUT fault or warning IOUT fault or warning X X POWER_GOOD# (is negated) X X X Default Value 0 0 0 0 0 0 0 0 Default Value 0 0 0 0 0 0 0 0 STATUS_VOUT : Returns one byte of information relating to the status of the module’s output voltage related faults. Bit Position 7 6 5 4 3 2 1 0 Flag VOUT OV Fault X X VOUT UV Fault X X X X Default Value 0 0 0 0 0 0 0 0 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 31 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Reading the Status of the Module using the PMBus(continued) STATUS_IOUT : Returns one byte of information relating to the status of the module’s output voltage related faults. Bit Position 7 6 5 4 3 2 1 0 Flag IOUT OC Fault X IOUT OC Warning X X X X X Default Value 0 0 0 0 0 0 0 0 STATUS_TEMPERATURE : Returns one byte of information relating to the status of the module’s temperature related faults. Bit Position 7 6 5 4 3 2 1 0 Flag OT Fault OT Warning X X X X X X Default Value 0 0 0 0 0 0 0 0 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 32 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Reading the Status of the Module using the PMBus(continued) STATUS_CML : Returns one byte of information relating to the status of the module’s communication related faults. Bit Position 7 6 5 4 3 2 1 0 Flag Invalid/Unsupported Command Invalid/Unsupported Command Packet Error Check Failed X X X Other Communication Fault X Default Value 0 0 0 0 0 0 0 0 MFR_VIN_MIN : Returns minimum input voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed at -2, and lower 11 bits are mantissa in two’s complement format – fixed at 12) MFR_VOUT_MIN : Returns minimum output voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed at -10, and lower 11 bits are mantissa in two’s complement format – fixed at 614) MFR_SPECIFIC_00 : Returns information related to the type of module and revision number. Bits [7:2] in the Low Byte indicate the module type (000000 corresponds to the PDT012 series of module), while bits [7:3] indicate the revision number of the module. Bit Position 7:2 1:0 Flag Module Name Reserved Default Value 000000 10 Bit Default Flag Position Value 7:3 Module Revision Number None 2:0 Reserved 000 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 33 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Summary of Supported PMBus Commands Please refer to the PMBus 1.1 specification for more details of these commands. Table 6 Hex Code 01 Command OPERATION Non-Volatile Memory Storage Brief Description Turn Module on or off. Also used to margin the output voltage Unsigned Binary Format 7 6 5 4 3 2 Bit Position r/w r r/w r/w r/w r/w Access On X Margin Function 0 0 0 0 0 0 Default Value 1 r X X 0 r X X 02 ON_OFF_CONFIG Configures the ON/OFF functionality as a combination of analog ON/OFF pin and PMBus commands Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r/w r/w r/w r/w r Access X X X pu cmd pol cpa X Function 0 0 0 1 0 1 1 1 Default Value 03 CLEAR_FAULTS Clear any fault bits that may have been set, also releases the SMBALERT# signal if the device has been asserting it. 10 WRITE_PROTECT Used to control writing to the module via PMBus. Copies the current register setting in the module whose command code matches the value in the data byte into nonvolatile memory (EEPROM) on the module Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w x x x x x Access bit7 bit6 bit5 X X X X X Function 0 0 0 X X X X X Default Value Bit5: 0 – Enables all writes as permitted in bit6 or bit7 1 – Disables all writes except the WRITE_PROTECT, OPERATION and ON_OFF_CONFIG (bit 6 and bit7 must be 0) Bit 6: 0 – Enables all writes as permitted in bit5 or bit7 1 – Disables all writes except for the WRITE_PROTECT and OPERATION commands (bit5 and bit7 must be 0) Bit7: 0 – Enables all writes as permitted in bit5 or bit6 1 – Disables all writes except for the WRITE_PROTECT command (bit5 and bit6 must be 0) 11 STORE_DEFAULT_ALL 12 RESTORE_DEFAULT_ALL 13 STORE_DEFAULT_CODE 14 RESTORE_DEFAULT_CODE 20 VOUT_MODE YES YES Copies all current register settings in the module into non-volatile memory (EEPROM) on the module. Takes about 50ms for the command to execute. Restores all current register settings in the module from values in the module nonvolatile memory (EEPROM) Copies the current register setting in the module whose command code matches the value in the data byte into non-volatile memory (EEPROM) on the module 7 6 5 4 3 2 1 0 Bit Position w w w w w w w w Access Command code Function Restores the current register setting in the module whose command code matches the value in the data byte from the value in the module non-volatile memory (EEPROM) 7 6 5 4 3 2 1 0 Bit Position w w w w w w w w Access Command code Function The module has MODE set to Linear and Exponent set to -10. These values cannot be changed 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Mode Exponent Function 0 0 0 1 0 1 1 0 Default Value Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 34 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code Command 22 VOUT_TRIM 25 VOUT_MARGIN_HIGH 26 29 35 VOUT_MARGIN_LOW Non-Volatile Memory Storage Brief Description Apply a fixed offset voltage to the output voltage command value. Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function High Byte Default Value 0 0 0 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 0 0 0 0 0 0 0 Sets the target voltage for margining the output high. Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function High Byte Default Value 0 0 0 0 0 1 0 1 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 0 0 0 1 1 1 Sets the target voltage for margining the output low. Exponent is fixed at Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 Access r r/w r/w r/w r/w r/w r/w Function High Byte Default Value 0 0 0 0 0 1 0 Bit Position 7 6 5 4 3 2 1 Access r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 0 1 0 0 0 YES YES -10 0 r/w 0 0 r/w YES 1 VOUT_SCALE_LOOP Sets the scaling of the output voltage – equal to the feedback resistor divider ratio Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r/w r/w Function Exponent Mantissa Default Value 1 0 1 1 1 0 0 1 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 0 0 0 0 0 0 YES VIN_ON Sets the value of input voltage at which the module turns on Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa Default Value 1 1 1 1 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 0 0 1 0 1 1 YES Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 35 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code 36 38 39 40 41 Command Non-Volatile Memory Storage Brief Description VIN_OFF Sets the value of input voltage at which the module turns off Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Exponent Mantissa Function 1 1 1 1 0 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r/w r/w r/w r/w r/w r/w r/w Access Mantissa Function 0 0 0 0 1 0 1 0 Default Value YES IOUT_CAL_GAIN Returns the value of the gain correction term used to correct the measured output current Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r/w Access Exponent Mantissa Function 1 0 0 0 1 0 0 V Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Mantissa Function V: Variable based on factory calibration Default Value YES IOUT_CAL_OFFSET Returns the value of the offset correction term used to correct the measured output current Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r/w r r Access Exponent Mantissa Function 1 1 1 0 0 V 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r/w r/w r/w r/w r/w r/w Access Mantissa Function 0 0 V: Variable based on factory calibration Default Value YES Sets the voltage level for an output overvoltage fault. Exponent is fixed at Linear, two’s complement binary Format 7 6 5 4 3 2 1 Bit Position r r/w r/w r/w r/w r/w r/w Access High Byte Function 0 0 0 0 0 1 0 Default Value 7 6 5 4 3 2 1 Bit Position r/w r/w r/w r/w r/w r/w r/w Access Low Byte Function 0 0 0 0 1 0 1 Default Value YES VOUT_OV_FAULT_LIMIT VOUT_OV_FAULT_RESPONSE -10. 0 r/w 1 0 r/w 0 Instructs the module on what action to take in response to a output overvoltage fault Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r r r Access RSP RSP RS[2] RS[1] RS[0] X X X Function [1] [0] 1 1 1 1 1 1 0 0 Default Value YES Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 36 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code 44 45 4A 5E 5F Command Brief Description Non-Volatile Memory Storage VOUT_UV_FAULT_LIMIT Sets the voltage level for an output undervoltage fault. Exponent is fixed at -10. Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r/w r/w r/w r/w r/w r/w r/w Access High Byte Function 0 0 0 0 0 1 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Low Byte Function 1 0 0 0 1 1 1 1 Default Value YES VOUT_UV_FAULT_RESPONSE Instructs the module on what action to take in response to a output undervoltage fault Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r r r Access RSP RSP RS[2] RS[1] RS[0] X X X Function [1] [0] 0 0 0 0 0 1 0 0 Default Value YES IOUT_OC_WARN_LIMIT Sets the output overcurrent warning level in A Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Exponent Mantissa Function 1 1 1 1 1 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r/w r/w r/w r/w r/w r/w Access Mantissa Function 0 0 0 1 1 0 1 1 Default Value YES POWER_GOOD_ON Sets the output voltage level at which the PGOOD pin is asserted high. Exponent is fixed at -10. Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r/w r/w r/w r/w r/w r/w r/w Access High Byte Function 0 0 0 0 0 1 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Low Byte Function 0 1 1 0 1 0 1 0 Default Value YES POWER_GOOD_OFF Sets the output voltage level at which the PGOOD pin is de-asserted low. Exponent is fixed at -10. Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r/w r/w r/w r/w r/w r/w r/w Access High Byte Function 0 0 0 0 0 1 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Low Byte Function 0 1 0 1 0 0 1 0 Default Value YES Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 37 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code 61 78 79 7A 7B 7D Command TON_RISE Non-Volatile Memory Storage Brief Description Sets the rise time of the output voltage during startup Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r/w Access Exponent Mantissa Function 1 1 1 0 0 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Mantissa Function 0 0 1 0 1 0 1 0 Default Value STATUS_BYTE Returns one byte of information with a summary of the most critical module faults Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access VOUT IOUT VIN_ OTHE X OFF TEMP CML Flag _OV _OC UV R 0 0 0 0 0 0 0 0 Default Value STATUS_WORD Returns two bytes of information with a summary of the module’s fault/warning conditions Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access IOUT PGOO VOUT X X X X X Flag _OC D 0 0 0 0 0 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access VOUT IOUT VIN_ OTHE X OFF TEMP CML Flag _OV _OC UV R 0 0 0 0 0 0 0 0 Default Value STATUS_VOUT Returns one byte of information with the status of the module’s output voltage related faults Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access VOUT_OV X X VOUT_UV X X X X Flag 0 0 0 0 0 0 0 0 Default Value STATUS_IOUT Returns one byte of information with the status of the module’s output current related faults Unsigned Binary Format 7 6 5 4 3 2 1 Bit Position r r r r r r r Access IOUT_OC X X X IOUT_OC_WARN X X Flag 0 0 0 0 0 0 0 Default Value STATUS_TEMPERATURE YES 0 r X 0 Returns one byte of information with the status of the module’s temperature related faults Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access OT_FAULT OT_WARN X X X X X X Flag 0 0 0 0 0 0 0 0 Default Value Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 38 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code Command 7E STATUS_CML 88 READ_VIN 8B 8C 98 A0 Non-Volatile Memory Storage Brief Description Returns one byte of information with the status of the module’s communication related faults Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Other Invalid Invalid PEC X X X X Comm Flag Command Data Fail Fault 0 0 0 0 0 0 0 0 Default Value Returns the value of the input voltage applied to the module Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Exponent Mantissa Function 1 1 0 1 1 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Mantissa Function 0 0 0 0 0 0 0 0 Default Value READ_VOUT Returns the value of the output voltage of the module. Exponent is fixed at -10. Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Mantissa Function 0 0 0 0 0 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Mantissa Function 0 0 0 0 0 0 0 0 Default Value READ_IOUT Returns the value of the output current of the module Linear, two’s complement binary Format 7 6 5 4 3 2 1 Bit Position r r r r r r r Access Exponent Mantissa Function 1 1 1 0 0 0 0 Default Value 7 6 5 4 3 2 1 Bit Position r r r r r r r Access Mantissa Function 0 0 0 0 0 0 0 Default Value PMBUS_REVISION MFR_VIN_MIN 0 r 0 0 r 0 Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read only) Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access 0 0 0 1 0 0 0 1 Default Value YES Returns the minimum input voltage the module is specified to operate at (read only) Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Exponent Mantissa Function 1 1 1 1 0 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Mantissa Function 0 0 0 0 1 1 0 0 Default Value YES Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 39 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code Command A4 MFR_VOUT_MIN D0 MFR_SPECIFIC_00 D4 VOUT_CAL_OFFSET D5 VOUT_CAL_GAIN D6 VIN_CAL_OFFSET Brief Description Returns the minimum output voltage possible from the module(read only). Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Exponent Mantissa Function 0 0 0 0 0 0 1 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Mantissa Function 0 1 1 0 0 1 1 0 Default Value Returns module name information(read only). Unsigned Binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Reserved Function 1 1 1 0 1 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r Access Module Name Reserved Function 0 0 0 0 0 0 1 0 Default Value Applies an offset to the READ_VOUT command results to calibrate out offset errors in module measurements of the output voltage (between-125mV and +124mV).Exponent is fixed at -10.. Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r/w r r r r r r r Access Mantissa Function V 0 0 0 0 0 0 0 Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Mantissa Function V V V V V V V V Default Value Applies a gain correction to the READ_VOUT command results to calibrate out gain errors in module measurements of the output voltage (between-0.125 and 0.121). Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r r r r/w Access Exponent Mantissa Function 1 1 0 0 0 0 0 V Default Value 7 6 5 4 3 2 1 0 Bit Position r/w r/w r/w r/w r/w r/w r/w r/w Access Mantissa Function V V V V V V V V Default Value Applies an offset correction to the READ_VIN command results to calibrate out offset errors in module measurements of the input voltage (between -2V and +1.968). Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r/w r r r/w Access Exponent Mantissa Function 1 1 0 1 V 0 0 V Default Value 7 6 5 4 3 2 1 0 Bit Position r r r/w r/w r/w r/w r/w r/w Access Mantissa Function 0 0 V V V V V V Default Value Non-Volatile Memory Storage YES YES YES YES YES Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 40 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Hex Code D7 Command Brief Description Non-Volatile Memory Storage VIN_CAL_GAIN Applies a gain correction to the READ_VIN command results to calibrate out gain errors in module measurements of the input voltage (between -0.125 and 0.121) Linear, two’s complement binary Format 7 6 5 4 3 2 1 0 Bit Position r r r r r/w r r r/w Access Exponent Mantissa Function 1 1 0 0 V 0 0 V Default Value 7 6 5 4 3 2 1 0 Bit Position r r r r/w r/w r/w r/w r/w Access Mantissa Function 0 0 0 V V V V V Default Value YES Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 41 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Thermal Considerations The SLDN-12D1Ax Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 49. The preferred airflow direction for the module is in Figure 50. Figure 49 25.4_ (1.0) Wind Tunnel PWBs Power Module 76.2_ (3.0) x 12.7_ (0.50) Probe Location for measuring airflow and ambient temperature Air flow Thermal Test Setup. The thermal reference points, Tref used in the specifications are also shown in Figure 50. For reliable operation the temperatures at these points should not exceed 120oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note “Thermal Characterization Process For Open-Frame Board-Mounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. Figure 50 Preferred airflow direction and location of hot-spot of the module(Tref). Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 42 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Example Application Circuit Requirements: Vin: 12V Vout: 1.8V Iout: 9A max., worst case load transient is from 6A to 9A Vout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p) Vin+ Vout+ VI N PGOOD VOUT VS+ RTUNE MODULE SEQ CI2 TRIM ADDR0 A SMBALRT# ADDR1 CI1 Q1 GND CTUNE CL K DAT ON/OFF CO1 CO2 RTrim RADDR1 RADDR0 SIG_GND GND VS- CI1 2x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI2 47F/16V bulk electrolytic CO1 2 x 47F/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CO2 1 x 330F/6.3V Polymer (e.g. Sanyo Poscap) CTune 3300pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 270 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 10k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 43 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Mechanical Outline Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.) PIN 1 FUNCTION ON/OFF PIN 10 FUNCTION PGOOD 2 VIN 11 SYNC 3 GND 12 VS- 4 VOUT 13 SIG. GND 5 VS+ (SENSE) 14 SMBALERT 6 TRIM 15 DATA 7 GND 16 ADDR0 8 CLK 17 ADDR1 9 SEQ Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 44 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Recommended Pad Layout Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.) PIN FUNCTION PIN FUNCTION 1 ON/OFF 10 PGOOD 2 VIN 11 SYNC 3 GND 12 VS4 VOUT 13 SIG_GND 5 VS+ (SENSE) 14 SMBALERT 6 TRIM 15 DATA 7 GND 16 ADDR0 8 CLK 17 ADDR1 9 SEQ Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 45 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Packaging Details The SLDN-12D1Ax 12A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 200 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: 330.2 mm (13.00) Inside Dimensions: 177.8 mm (7.00”) Tape Width: 24.00 mm (0.945”) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 46 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Surface Mount Information Pick and Place The SLDN-12D1Ax modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and o is able to withstand reflow temperatures of up to 300 C. The label also carries product information such as product code, serial number and the location of manufacture. Nozzle Recommendations The SLDN-12D1Ax module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 7 mm. Bottom Side / First Side Assembly This SLDN-12D1Ax module is not recommended for assembly on the bottom side of a customer board. If such an assembly is attempted, components may fall off the module during the second reflow process. Lead Free Soldering The SLDN-12D1Ax modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability. Pb-free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 50. Soldering outside of the recommended profile requires testing to verify results and performance. MSL Rating The SLDN-12D1Ax modules have a MSL rating of 2. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 47 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Surface Mount Information(continued) Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity. Figure51 300 Per J-STD-020 Rev. C Peak Temp 260°C Reflow Temp (°C) 250 200 * Min. Time Above 235°C 15 Seconds 150 Heating Zone 1°C/Second Cooling Zone *Time Above 217°C 60 Seconds 100 50 0 Reflow Time (Seconds) Recommended linear reflow profile using Sn/Ag/Cu solder. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note (AN04-001). Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 48 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.45 Vdc - 5.5 Vdc /12 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Oct. 11,2012 Revision History Date Revision Changes Detail Approval 2011-10-19 A First release HL LU 2012-05-09 B Adding patent information. HL LU RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. Bel Power Digital Non-Isolated DC-DC products use technology licensed from Power-One, protected by US patents: US20040246754, US2004090219A1, US2004093533A1, US2004123164A1, US2004123167A1, US2004178780A1, US2004179382A1, US20050200344, US20050223252, US2005289373A1, US20060061214, US2006015616A1, US20060174145, US20070226526, US20070234095, US20070240000, US20080052551, US20080072080, US20080186006, US6741099, US6788036, US6936999, US6949916, US7000125, US7049798, US7068021, US7080265, US7249267, US7266709, US7315156, US7372682, US7373527, US7394445, US7456617, US7459892, US7493504, US7526660. Outside the US the Power-One licensed technology is protected by patents: AU3287379AA, AU3287437AA, AU3290643AA, AU3291357AA, CN10371856C, CN1045261OC, CN10458656C, CN10459360C, CN10465848C, CN11069332A, CN11124619A, CN11346682A, CN1685299A, CN1685459A, CN1685582A, CN1685583A, CN1698023A, CN1802619A, EP1561156A1, EP1561268A2, EP1576710A1, EP1576711A1, EP1604254A4, EP1604264A4, EP1714369A2, EP1745536A4, EP1769382A4, EP1899789A2, EP1984801A2, W004044718A1, W004045042A3, W004045042C1, W004062061 A1, W004062062A1, W004070780A3, W004084390A3, W004084391A3, W005079227A3, W005081771A3, W006019569A3, W02007001584A3, W02007094935A3 2012 Bel Fuse Inc. Specifications subject to change without notice.101112 51 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com