NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 SLAN-03D2Ax RoHS Compliant Rev.A Features Non-Isolated Cost efficient open frame design Power Good signal Ability to sink and source current Remote On/Off DOSA based Overtemperature protection Fixed switching frequency 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. Tunable Loop Output overcurrent protection (non-latching) Wide operating temperature range [-40°C to 85°C] Wide Input voltage range (3Vdc-14.4Vdc).Ref.to Figure 41 for corresponding output range. UL 60950-1,2 Ed. Recognized, CSA C22.2 No. 60950-1-07 Certified, and VDE (EN60950-1,2 Ed.) Licensed Small size:12.2mm×12.2mm×6.25mm(0.48 in×0.48 in×0.246 in) ISO 9001 and ISO 14001 certified manufacturing facilities TM to optimize dynamic output voltage response nd nd Applications Distributed power architectures Servers and storage applications Intermediate bus voltage applications Networking equipment Telecommunications equipment Industrial equipment Description The SLAN-03D2Ax modules are non-isolated dc-dc converters that can deliver up to 3A of output current. These modules operate over a wide range of input voltage (Vin = 3 Vdc-14.4 Vdc) and provide a precisely regulated output voltage from 0.6 Vdc to 5.5 Vdc, programmable via an external resistor. Features include remote On/Off, TM adjustable output voltage, over current and over temperature protection. The Tunable Loop feature 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 0.6 - 5.5 Vdc 3 - 14.4 Vdc Max. Output Current 3A Max. Output Power 16.5W Typical Efficiency 93.9% Model Number Active High SLAN-03D2A0 Model Number Active Low SLAN-03D2AL 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Part Number Explanation S LAN – 03 D 2A 0 1 2 3 4 5 6 1---Surface mount 2---Series code 3---Output current (3A) 4---Wide input voltage range (3-14.4V) 5---Without 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 Operating Ambient Temperature -40 85 C TA Notes see Thermal Considerations section C 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. Storage Temperature -55 Tstg 125 Input Specifications Parameter Operating Input Voltage Min 3 Typ - Max 14.4 Unit V Input Current (full load) - - 2.4 A - TBD - mA VO,set = 0.6 Vdc - 38 - mA VO,set = 5 Vdc Input Stand-by Current - 0.65 - mA VIN = 12V, module disabled Input Reflected Ripple Current (pk-pk) - 15 - mAp-p I t Inrush Current Transient - - 1 As Input Ripple Rejection (120Hz) - -60 - dB Input Current (no load) 2 Notes VIN=3V to 14V, IO= IOmax VIN = 12Vdc, IO = 0, module enabled 5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= IOmax ; See Test Configurations 2 Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. 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 Adjustment Range 0.6 - 5.5 V - - 0.5 V - - 10 10 mV mV 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 1. selected by an external resistor. 2. Some output voltages may not be possible depending on the input voltage – see Feature Descriptions Section. Load Regulation VO ≥ 2.5V VO < 2.5V IO=IO, min to IO, max 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Output Specifications (continued) Parameter Min Typ Max Unit Notes - - 0.4 5 %Vo,set mV VIN=VIN, min to VIN, max Temperature Regulation - - 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 - 0.5 - A Vo≤250mV, Hiccup Mode Output Capacitance ESR≥ 1 mΩ ESR≥0.15 mΩ ESR≥ 10 mΩ 10 10 10 - 22 TBD TBD μF μF μF Without the Tunable Loop TM With the Tunable Loop TM With the Tunable Loop Output Current 0 - 3 A In either sink or source mode Output Current Limit Inception - 200 - % Io,max Output voltage overshoot - - 3.0 %Vo, set. - 4 - 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 ) - 4.8 - msec 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) - 2.8 - msec Time for Vo to rise from 10% of Vo, set to 90% of Vo, set. Line Regulation VO ≥ 2.5V VO < 2.5V 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max, Co = 0.1μF // 22 μF ceramic capacitors) 1 1. Hiccup Mode 2.Current limit does not operate in sink mode Vin = Vin,min to Vin, max,IO = IO, min to IO, max, TA=25°C With or without maximum external capacitance Turn-On Delay Times (VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state) Output voltage Rise time TM External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well TM as getting the best transient response. See the Tunable Loop section for details. Notes: 1 General Specifications Parameter Min Typ Max Unit - 75.0 82.8 88.2 89.9 91.6 93.9 - % % % % % % - 600 - kHz 2.69 0.2 3.0 - V V V TBD - C Notes Efficiency Vo=0.6V(8Vin) Vo=1.2V Vo=1.8V Vo=2.5V Vo=3.3V Vo=5.0V Switching Frequency Vin= 12Vdc, TA=25°C Io=Io, max , Vo= Vo,set Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold Hysteresis Over Temperature Protection - 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 General Specifications(continued) Parameter PGOOD (Power Good) Overvoltage threshold for PGOOD Undervoltage threshold for PGOOD Pulldown resistance of PGOOD pin Weight Min - MTBF Typ Max Unit 112.5 87.5 30 - %VO, set %VO, set 0.89 - g 19,508,839 hours 0.48 x 0.48 x 0.246 12.2 x 12.2 x 6.25 - Notes Signal Interface Open Vsupply 5Vdc Drain, 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) Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Efficiency Data 95 90 85 90 EFFICIENCY, (%) EFFICIENCY, (%) 80 75 70 Vin=3.3V Vin=6V 65 Vin=8V 60 55 85 Vin=3.3 V 80 75 65 50 0 0.5 1 1.5 2 2.5 0 3 0.5 OUTPUT CURRENT, IO (A) 1 2 2.5 3 2.5 3 Vo=1.2V 100 95 95 EFFICIENCY, (%) 100 90 Vin=3.3V 85 80 1.5 OUTPUT CURRENT, IO (A) Vo=0.6V EFFICIENCY, (%)) Vin=14.4V Vin=12V 70 Vin=14.4V Vin=12V 90 Vin=4.5V 85 80 Vin=14.4 V Vin=12V 75 70 75 0 0.5 1 1.5 2 2.5 0 3 0.5 OUTPUT CURRENT, IO (A) 1 1.5 2 OUTPUT CURRENT, IO (A) Vo=1.8V Vo=2.5V 100 100 95 95 90 EFFICIENCY, (%) EFFICIENCY, (%)) 90 Vin=4.5V 85 Vin=14.4V Vin=12V 80 85 Vin=8V Vin=12V Vin=14.4V 80 75 70 65 60 75 0 0.5 1 1.5 2 OUTPUT CURRENT, IO (A) Vo=3.3V 2.5 3 0 0.5 1 1.5 2 2.5 3 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Thermal Derating Curves 3.5 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 3.5 3.0 NC 2.5 St an dard Part ( 85°C) Rug ged iz ed ( D) 2.0 0.5m /s ( 100LF M) 1m /s ( 200LF M) 2m/ s (400L FM) Part ( 105°C) 1.5m /s (300L FM) 1.5 55 65 75 85 95 3.0 NC 2.5 2.0 R ugged iz ed ( D) Part ( 105° C) 55 65 75 85 95 105 AMBIENT TEMPERATURE, TA OC Vo=0.6V Vo=1.2V 3.5 3.5 1.5m/s ( 300LF M) OUTPUT CURRENT, Io (A) 1.5m/s ( 300LF M) OUTPUT CURRENT, Io (A) 1m/s (200LFM) 1.5 105 AMBIENT TEMPERATURE, TA OC 3.0 NC 2.5 0. 5m/ s (100LFM) St an dard P art (85° C) 2.0 Rug gediz ed ( D) Part ( 105°C) 1m/ s ( 200LF M) 1.5 55 65 75 85 95 3.0 NC 2.5 0.5m/s ( 100LF M) S tan dard 2.0 P art (85° C) 1.5 R ugged ized ( D) P art ( 105°C) 1m/s (200LFM) 1.0 105 55 AMBIENT TEMPERATURE, TA OC 65 75 85 95 105 AMBIENT TEMPERATURE, TA OC Vo=1.8V Vo=2.5V 3.5 3.5 1.5m/s ( 300LF M) OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 0.5m/s ( 100LFM) Stand ard Part ( 85 C) 3.0 NC 2.5 0.5m/s (100LFM) S t andard P art (85°C) 2.0 Rugg ediz ed (D) P art (105° C) 1m/s ( 200LFM) 1.5 55 65 75 85 95 AMBIENT TEMPERATURE, TA OC Vo=3.3V 105 1m/s ( 200LF M) 3.0 NC 2.5 S t an dard 0.5m/s (100LFM) P art (85° C) 2.0 Rugg ediz ed (D) Part (105° C) 1.5 45 55 65 75 85 95 105 AMBIENT TEMPERATURE, TA OC 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Mar. 16, 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, Vin=12V OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (20mV/div) Vo=0.6V, Io = Io,max , Vin=8V TIME, t (1s/div) TIME, t (1s/div) Vo=2.5V, Io = Io,max, Vin=12V OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (20mV/div) Vo=1.8V, Io = Io,max, Vin=12V TIME, t (1s/div) Vo=3.3V, Io = Io,max, Vin=12V TIME, t (1s/div) Vo=5.0V, Io = Io,max, Vin=12V Note: CO=10μF ceramic 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs TIME, t (20s /div) OUTPUT VOLTAGE VO (V) (10 mV/div) OUTPUT VOLTAGE VO (V) (50mV/div) TIME, t (20s /div) TIME, t (20s /div) Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout-2x47uF, CTune-2700pF & RTune-261. Vo=2.5V OUTPUT VOLTAGE VO (V) (50mV/div) OUTPUT VOLTAGE VO (V) (50mV/div) Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout-1x47uF+1x330uF, CTune10nF & RTune-261. Vo=1.8V OUTPUT CURRENT, IO (A) (1Adiv) TIME, t (20s /div) Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout-1x47uF+1x330uF, CTune10nF & RTune-261. Vo=1.2V OUTPUT CURRENT, IO (A) (1Adiv) OUTPUT CURRENT, IO (A) (1Adiv) OUTPUT VOLTAGE VO (V) (10mV/div) Transient Response to Dynamic Load Change from 50% to 100% at 8Vin, Cout-1x47uF+2x330uF, CTune27nF, RTune-178. Vo=0.6V TIME, t (20s /div) Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout-2x47uF, CTune-2200pF & RTune-261. Vo=3.3V OUTPUT CURRENT, IO (A) (1Adiv) OUTPUT VOLTAGE VO (V) 10 mV/div) OUTPUT CURRENT, IO (A) 1Adiv) TBD Bel Power Inc., a subsidiary of Bel Fuse Inc. OUTPUT CURRENT, IO (A) (1Adiv) Mar. 16, 2012 Transient Response Waveforms TIME, t (20s /div) Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout-1x47uF, CTune-820pF & RTune-261. Vo=5V 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 OUTPUT VOLTAGE VO (V) (500mV/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE VO (V) (200mV/div) VON/OFF (V) (5V/div) Startup Time TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V OUTPUT VOLTAGE VO (V) (1V/div) OUTPUT VOLTAGE ON/OFF VOLTAGE VO (V) (500mV/div) VON/OFF (V) (5V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=0.6V TIME, t (2 ms/div) TIME, t (2 ms/div) TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=3.3V Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V OUTPUT VOLTAGE ON/OFF VOLTAGE VO (V) (2V/div) VON/OFF (V) (5V/div) OUTPUT VOLTAGE VO (V) (1V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V TIME, t (2 ms/div) 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Mar. 16, 2012 OUTPUT VOLTAGE VO (V) (500mV/div) INPUT VOLTAGE VIN (V) (5V/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.2V OUTPUT VOLTAGE VO (V) (500mV/div) INPUT VOLTAGE VIN (V) (5V/div) INPUT VOLTAGE VIN (V) (5V/div) TIME, t (2 ms/div) TIME, t (2 ms/div) TIME, t( 2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=2.5V OUTPUT VOLTAGE VO (V) (2V/div) INPUT VOLTAGE VIN (V) (5V/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.8V OUTPUT VOLTAGE VO (V) (1V/div) OUTPUT VOLTAGE VO (V) (200mV/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 8V, Io = Io,max ), Vo=0.6V INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (1V/div) VO (V) (5/div) Bel Power Inc., a subsidiary of Bel Fuse Inc. INPUT VOLTAGE VIN (V) (5V/div) Startup Time (continued) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=3.3V 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Mar. 16, 2012 Design Considerations Bel Power Inc., a subsidiary of Bel Fuse Inc. Input Filtering The SLAN-03D2Ax 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 3A of load current with 1x22µF or 2x22µF ceramic capacitors and an input of 12V. Figure 37 Note: Input ripple voltage for various output voltages with 1x22 µF or 2x22 µF ceramic capacitors at the input (3A 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 10 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 3A. 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Output Filtering (continued) Figure 38 Note: Output ripple voltage for various output voltages with external 1x10uF, 1x22uF, 1x47uF and 2x47uF ceramic capacitors at the output (3A 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 fast-acting fuse with a maximum rating of TBD 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 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 0.4 Unit V 3.0 - Vin,max V -0.2 - 0.3 V 3.0 - Vin,max V Notes The remote on/off pin open, Unit on. The remote on/off pin open, Unit on. The SLAN-03D2Ax 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 Q1 is in the OFF state, the internal PWM Enable signal is pulled high through an internal resistor and the external pullup resistor and the module is ON. When transistor Q1 is turned ON, the On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is TBD. Figure 39 TBD Circuit configuration for using positive On/Off logic. 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 14.4V input range is 20Kohms). When transistor Q1 is in the OFF state, the On/Off pin is pulled high, internal transistor Q4 is turned ON and the module is OFF. To turn the module ON, Q1 is turned ON pulling the On/Off pin low, turning transistor Q4 OFF resulting in the PWM Enable pin going high and the module turning ON. Figure 40 VIN+ MODULE Rpullup PWM Enable I ON/OFF ON/OFF + VON/OFF Q1 GND Q4 22K 22K CSS _ Circuit configuration for using negative On/Off logic. 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Monotonic Start-up and Shutdown The SLAN-03D2Ax 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 SLAN-03D2Ax can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. 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 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 12V. 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 GND 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 14 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Output Voltage Programming(continued) Without an external resistor between Trim and 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. 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 Remote Sense The power module has a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin should not exceed 0.5V. Voltage Margining Output voltage margining can be implemented in the module by connecting a resistor, R margin-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 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.com under the Downloads section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local Bel Power technical representative for additional details. Figure 43 Vo Rmargin-down MODULE Q2 Trim Rmargin-up Rtrim Q1 GND Circuit Configuration for margining Output voltage. 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 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. Overtemperature Protection To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will o shutdown if the overtemperature threshold of TBD 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. 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. Power Good The SLAN-03D2Ax 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 deasserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going ±10% outside the setpoint value. The PGOOD terminal can be connected through a pullup resistor (suggested value 100K) to a source of 5VDC or lower. Dual Layout Identical dimensions and pin layout of Analog and Digital 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. 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 44 MODULE TRIM (PVX003 / PDT003) Rtrim1 for Digital Rtrim2 for Analog SIG_GND GND Caution – Do not connect SIG_GND to GND elsewhere in the layout Layout to support either Analog or Digital on the same pad. 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Tunable LoopTM The SLAN-03D2Ax modules have a feature that optimizes transient response of the module called Tunable TM 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 TM connected to the output of the module. The Tunable Loop is implemented by connecting a series R-C between the SENSE and TRIM pins of the module, as shown in Fig. 45. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module. Figure 45 VOUT SENSE RTUNE MODULE CO CTUNE TRIM GND RTrim Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3. 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 1.5A to 3A 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 or input voltages other than 12V. Table 2 Co 1x47F 2x47F 4x47F 6x47F 10x47F RTUNE 270 220 180 180 180 CTUNE 1500pF 1800pF 3300pF 4700pF 4700pF General recommended values of of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations. 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Tunable LoopTM(continued) Table 3 Vo 5V 3.3V 2.5V Co 1x47F 1x47F 2x47F 1.8V 1.2V 0.6V 1x330F 1x330F 2x330F Polymer Polymer Polymer RTUNE 270 220 180 180 180 180 CTUNE 1500pF 68mV 1800pF 60mV 3300pF 37mV 8200pF 18mV 8200pF 18mV 33nF 10mV V Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 1.5A 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. Thermal Consideration 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 46. The preferred airflow direction for the module is in Figure 47. Figure 46 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 47. For reliable operation o the temperatures at these points should not exceed 120 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Thermal Consideration(continued) Figure 47 Preferred airflow direction and location of hot-spot of the module (Tref). Example Application Circuit Requirements: Vin: 12V Vout: 1.8V Iout: 2.25A max., worst case load transient is from 1.5A to 2.25A Vout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p) Vout+ Vin+ VIN VOUT SENSE PGOOD + CI2 RTUNE + MODULE CI1 CTUNE ON/OFF GND CO1 CO2 TRIM RTrim CI1 1x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20 or equivalent) CI2 47F/16V bulk electrolytic CO1 2 x 47F/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19 or equivalent) CO2 None CTune 2200pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 261 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 19 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 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.) 17 16 13 14 12 15 11 7 8 9 PIN FUNCTION PIN FUNCTION 1 ON/OFF 10 PGOOD 2 VIN 11 NC 3 GND 12 NC 4 VOUT 13 NC 5 VS+ (SENSE) 14 NC 6 TRIM 15 NC 7 GND 16 NC 8 NC 17 NC 9 NC 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 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.) 16 17 13 12 11 9 8 7 14 15 PIN FUNCTION PIN FUNCTION 1 ON/OFF 10 PGOOD 2 VIN 11 NC 3 GND 12 NC 4 VOUT 13 NC 5 VS+ (SENSE) 14 NC 6 TRIM 15 NC 7 GND 16 NC 8 NC 17 NC 9 NC 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, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Packaging Details The SLAN-03D2Ax 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 22 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Surface Mount Information Pick and Place The SLAN-03D2Ax 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 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 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 SLAN-03D2Ax modules are lead-free (Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free and a SnPb 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 5-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). For questions regarding LGA, solder volume; please contact Bel Power for special manufacturing process instructions. The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 48. Soldering outside of the recommended profile requires testing to verify results and performance. It is recommended that the pad layout include a test pad where the output pin is in the ground plane. The thermocouple should be attached to this test pad since this will be the coolest solder joints. The temperature of this point should be: Maximum peak temperature is 260 C. Minimum temperature is 235 C. Dwell time above 217 C: 60 seconds minimum. Dwell time above 235 C: 5 to 15 second. MSL Rating The SLAN-03D2Ax 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 23 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.6 Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. B (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. Figure48 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 24 NON-ISOLATED DC/DC CONVERTERS 3 Vdc – 14.4 Vdc Input, 0.6Vdc - 5.5 Vdc /3 A Outputs Bel Power Inc., a subsidiary of Bel Fuse Inc. Mar. 16, 2012 Revision History Date Revision 2012-03-16 A Changes Detail Approval First release 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. 2012 Bel Fuse Inc. Specifications subject to change without notice. 031612 25 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