NON-ISOLATED DC/DC CONVERTERS 3Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 SLIN-02E2Ax RoHS Compliant Rev.B Features • Wide Input Voltage Range • Ability to Sink and Source Current • Fixed Switching Frequency • Cost Efficient Open Frame Design • Power Good Signal • Over Temperature Protection • Remote Sense • Output Over Current Protection • Remote On/Off • Output Voltage Programmable TM • Tunable Loop (a registered trademark of Lineage Power Systems) to Optimize Dynamic output voltage response • Compliant to RoHS EU Directive 2002/95/EC • Compatible in a Pb-free or SnPb reflow environment • UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-03 Certified • VDE‡ 0805:2001-12 (EN60950-1) Licensed Applications • • • Distributed power architectures Intermediate bus voltage applications Telecommunications equipment • • • Servers and storage applications Networking equipment Industrial equipment Description The SLIN-02E2Ax power modules are non-isolated dc-dc converters that can deliver up to 2A of output current. These modules operate over a wide range of input voltage (VIN = 3Vdc-14Vdc) and provide a precisely regulated output voltage from 0.6Vdc to 5.5Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, and over current and over temperature protection. A new feature, the Tunable LoopTM, 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 Vdc - 5.5 Vdc 3 Vdc - 14 Vdc Max. Output Current 2A Max. Output Power 11 W Typical Efficiency 93.6% Model Number Active High SLIN-02E2A0 Model Number Active Low SLIN-02E2AL Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation S LIN – 02 E 2A 0 1 2 3 4 5 6 1---Surface mount 2---Series code 3---Output current (2A) 4--- Wide input voltage range (3-14V) 5--- Wide output voltage range (0.6-5.5V) 6--- Enable, active high, change “0” to “L” means active low 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Absolute Maximum Ratings Min Typ Max Unit Continuous Input Voltage -0.3 - 15 V Operating Ambient Temperature -40 - 85 °C Storage Temperature -55 - 125 °C Parameter 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 3.0 Typ - Max 14 Unit V Notes Input Current (full load) - - 1.8 A - 20 48 - mA mA - 8 - mA VIN = 12.0Vdc, module disabled 5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= IOmax ; See Test Configurations VIN=3V to 14V Input Current (no load) Vo=0.6V Vo=5.5V Input Stand-by Current Input Reflected Ripple Current (pk-pk) - 20 - mA I2t Inrush Current Transient - - 1 A2s Input Ripple Rejection (120Hz) - 65 - dB Turn-on Threshold - - 2.95 V Turn-off Threshold - - 2.8 V Hysteresis - 0.2 - V VIN=12V, IO = 0, module enabled 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 4A. 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Output Specifications Parameter Min Typ Max Unit Output Voltage Set Point -1.5 - +1.5 %Vo,set Output Voltage -2.5 - +2.5 %Vo,set Adjustment Range1 0.6 - 5.5 V - - 0.5 V VO ≥ 2.5V VO < 2.5V - - 10 5 mV mV VO ≥ 2.5V VO < 2.5V - - 0.4 10 %Vo,set mV Temperature Regulation (-40°C to +85°C) - - 0.4 %Vo,set Ripple and Noise (pk-pk) - 50 100 mV Ripple and Noise (rms) - 20 38 mV Output Current Range 0 - 2 A Output DC Current Limit - 180 %Io,max Output Short-Circuit Current - 140 mA Vo≤250mV, Hiccup Mode 22 0 0 - 47 1000 3000 uF uF uF - 5 - mS - 5.2 - mS Without the Tunable LoopTM TM With the Tunable Loop With the Tunable LoopTM 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) 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) Output voltage Rise time - 1.4 - mS Output voltage overshoot - - 3.0 %Vo,set Remote Sense Range Notes with 0.5% tolerance for external resistor used to set output voltage Over all operating input voltage, resistive load, and temperature conditions until end of life selected by an external resistor Load Regulation IO=IO, min to IO, max Line Regulation VIN=VIN, min to VIN, max 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 10 μF ceramic capacitors) in either sink or source mode Hiccup Mode 2 Output Capacitance ESR≥ 1 mΩ ESR≥0.15 mΩ ESR≥ 10 mΩ Turn-On Delay Time time for Vo to rise from 10% of Vo, set to 90% of Vo, set Vin=Vin, min to Vin, max, Io=Io, min to Io, max, With or without maximum external capacitance Notes: 1. Some output voltages may not be possible depending on the input voltage. 2. External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best transient response (See the Tunable LoopTM 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 General Specifications Parameter Min Typ Max Unit - 68.7 80.7 85.9 89 91.1 93.6 - % % % % % % - 600 - kHz Notes Efficiency Vo=0.6V Vo=1.2V Vo=1.8V Vo=2.5V Vo=3.3V Vo=5.0V Switching Frequency 140 - - °C PGOOD (Power Good) Overvoltage Threshold for PGOOD Undervoltage threshold for PGOOD Pulldown resistance of PGOOD pin - 112.5 87.5 30 70 %Vo,set %Vo,set Ω Weight - 0.9 - g Over Temperature Protection MTBF 26,121,938 hours 0.48 x 0.48 x 0.246 12.19 x 12.19 x 6.25 - Vin= 12Vdc, Ta=25°C Io=Io, max , Vo= Vo,set Signal Interface Open Drain, Vsupply ≤ 5Vdc Calculated Per Bell Core SR-332 (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. 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 85 95 80 90 75 EFFICIENCY, η (%) EFFICIENCY, η (%) Efficiency Data Vin=12V Vin=3V 70 65 Vin=14V 60 55 85 Vin=12V Vin=3V 80 75 Vin=14V 70 65 0 0.4 0.8 1.2 1.6 2 0 OUTPUT CURRENT, IO (A) 0.4 0.8 2 Vo=1.2V 100 95 95 90 Vin=12V Vin=12V Vin=3V EFFICIENCY, η (%) EFFICIENCY, η (%)) 1.6 OUTPUT CURRENT, IO (A) Vo=0.6V 85 Vin=14V 80 75 90 Vin=3.3V 85 Vin=14V 80 75 70 70 0 0.4 0.8 1.2 1.6 0 2 OUTPUT CURRENT, IO (A) 0.4 0.8 1.2 1.6 2 OUTPUT CURRENT, IO (A) Vo=1.8V Vo=2.5V 100 100 95 95 Vin=12V 90 EFFICIENCY, η (%) EFFICIENCY, η (%)) 1.2 Vin=4.5V 85 Vin=14V 80 75 70 Vin=12V 90 Vin=14V 85 Vin=6.5V 80 75 70 0 0.4 0.8 1.2 OUTPUT CURRENT, IO (A) Vo=3.3V 1.6 2 0 0.4 0.8 1.2 1.6 2 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Thermal Derating Curves 2.5 2 NC 1.5 1 0.5 0 45 55 65 75 85 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 2.5 2 1.5 1 0.5 0 45 AMBIENT TEMPERATURE, TA OC 55 85 Vo=1.2V 2.5 2 1.5 1 0.5 0 45 55 65 75 85 OUTPUT CURRENT, Io (A) 2.5 OUTPUT CURRENT, Io (A) 75 AMBIENT TEMPERATURE, TA OC Vo=0.6V 2 1.5 1 0.5 0 45 AMBIENT TEMPERATURE, TA OC 55 65 75 85 AMBIENT TEMPERATURE, TA OC Vo=1.8V Vo=2.5V 2.5 2 1.5 1 0.5 0 45 55 65 75 AMBIENT TEMPERATURE, TA OC Vo=3.3V 85 OUTPUT CURRENT, Io (A) 2.5 OUTPUT CURRENT, Io (A) 65 2 1.5 1 0.5 0 45 55 65 75 85 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE VO (V) (10mV/div) Ripple and Noise Waveforms TIME, t (1μs/div) TIME, t (1μs/div) Vin=12V, Vo=1.2V, Io = Io,max OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE VO (V) (10mV/div) Vin=12V, Vo=0.6V, Io = Io,max TIME, t (1μs/div) TIME, t (1μs/div) Vin=12V, Vo=2.5V, Io = Io,max OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE VO (V) (10mV/div) Vin=12V, Vo=1.8V, Io = Io,max TIME, t (1μs/div) Vin=12V, Vo=3.3V, Io = Io,max TIME, t (1μs/div) Vin=12V, 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs January 14, 2011 . Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. OUTPUT VOLTAGE VO (V) (100mV/div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=1.2V TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=2.5V OUTPUT VOLTAGE VO (V) (100mV/div) OUTPUT VOLTAGE VO (V) (100mV/div) OUTPUT CURRENT, IO (A) (1A/div) OUTPUT VOLTAGE VO (V) (100mV/div) OUTPUT CURRENT, IO (A) (1A/div) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=1.8V OUTPUT CURRENT, IO (A) (1A/div) TIME, t (20μs /div) OUTPUT VOLTAGE VO (V) (100mV/div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=0.6V OUTPUT CURRENT, IO (A) (1A/div) TIME, t (20μs /div) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=3.3V OUTPUT CURRENT, IO (A) (1A/div) OUTPUT CURRENT, IO (A) (1A/div) OUTPUT VOLTAGE VO (V) (100mV/div) Transient Response Waveforms TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 OUTPUT VOLTAGE VO (V) (200mV/div) OUTPUT VOLTAGE VO (V) (500mV/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) Startup Time TIME, t (1 ms/div) TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max, Vin=12V, Cext= 22uF), Vo=1.2V OUTPUT VOLTAGE VO (V) (1V/div) OUTPUT VOLTAGE VO (V) 500mV/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) Start-up Using On/Off Voltage (Io = Io,max, Vin=12V, Cext= 22uF), Vo=0.6V TIME, t (2 ms/div) TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max, Vin=12V, Cext= 22uF), Vo=2.5V OUTPUT VOLTAGE VO (V) (2V/div) OUTPUT VOLTAGE VO (V) (1V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) ON/OFF VOLTAGE VON/OFF (V) (5V/div) Start-up Using On/Off Voltage (Io = Io,max, Vin=12V, Cext= 22uF), Vo=1.8V TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max, Vin=12V, Cext= 22uF), Vo=3.3V TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max, Vin=12V, Cext= 22uF), 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 OUTPUT VOLTAGE Vo (V) (500mV/div) OUTPUT VOLTAGE Vo (V) (200mV/div) INTPUT VOLTAGE Vin (V) 5V/div) INTPUT VOLTAGE Vin (V) 5V/div) Startup Time (continued) TIME, t (1 ms/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Cext= 22uF, Io = Io,max), Vo=1.2V OUTPUT VOLTAGE INTPUT VOLTAGE Vin (V) 5V/div) Vo (V) (1V/div) OUTPUT VOLTAGE INTPUT VOLTAGE Vin (V) 5V/div) Vo (V) (500mV/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=0.6V TIME, t (2 ms/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Cext= 22uF, Io = Io,max), Vo=2.5V OUTPUT VOLTAGE INTPUT VOLTAGE Vin (V) 5V/div) Vo (V) (2V/div) OUTPUT VOLTAGE INTPUT VOLTAGE Vin (V) 5V/div) Vo (V) 1V/div) Start-up Using Input Voltage (VIN = 12V, Cext= 22uF, Io = Io,max), Vo=1.8V TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Cext= 22uF, Io = Io,max), Vo=3.3V TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Cext= 22uF, 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Test Configurations Input Reflected Ripple Current Test Setup. CURRENT PROBE TO OSCILLOSCOPE LTEST VIN(+) BATTERY 1μH CIN CS 1000μF Electrolytic 2x100μF Tantalum E.S.R.<0.1Ω @ 20°C 100kHz COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown above. Output Ripple and Noise Test Setup COPPER STRIP RESISTIVE LOAD Vo+ 0.1uF 10uF COM SCOPE USING BNC SOCKET GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Output Voltage and Efficiency Test Setup Rdistribution Rcontact Rcontact VIN(+) RLOAD VO VIN Rdistribution Rcontact Rcontact COM Rdistribution VO Rdistribution COM NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. VO. IO Efficiency η = VIN. IIN x 100 % 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Input Filtering The SLIN-02E2Ax module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. 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. The figure below shows the input ripple voltage for various output voltages at 2A of load current with 1x10 µF or 1x22 µF ceramic capacitors and an input of 5V. Input Ripple Voltage (mVp-p) 90 80 70 1x10uF 60 1x22uF 50 40 30 20 0.5 1 1.5 2 2.5 3 3.5 Output Voltage (Vdc) The figure below shows the input ripple voltage for various output voltages at 2A of load current with 1x10 µF or 1x22 µF ceramic capacitors and an input of 12V. Input Ripple Voltage (mVp-p) 110 100 90 80 1x10uF 70 1x22uF 60 50 40 30 20 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Output Voltage (Vdc) 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Output Filtering The SLIN-02E2Ax 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. A minimum 22uF External Cap must be used. The figure below provides output ripple information for different external capacitance values at various Vo and for a load current of 2A. 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 module can be achieved by using the Tunable LoopTM feature described later in this data sheet. 14 12 Ripple(mVp-p) 10 8 6 4 1x22uF External Cap 1x47uF External Cap 2x47uF External cap 2 0 0.5 1.5 2.5 3.5 Output Voltage(Volts) 4.5 Note: Output ripple voltage for various output voltages with external 1x22 µF, 1x47 µF, 2x47 µF ceramic capacitors at the output (2A 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, CSA C22.2 No. 60950-1, and DIN EN 60950-1 (VDE 0850 Teil 1):2006-11. 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 4A 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 13 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Active Low Min -0.2 Typ - Max 0.3 Unit V 3 - Vin,max V Notes The remote on/off pin open, Unit on. The SLIN-02E2Ax 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, 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, the module turns OFF during logic High and ON during logic Low. The On/Off signal is 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 below. VIN + MODULE 50K Rpullup PWM Enable 50K I ON/OFF ON/OF F 10K + VON/OFF GN D Q2 10K 10K 10K Q1 Q3 _ Circuit configuration for using positive On/Off logic For negative logic On/Off modules, the circuit configuration is shown below. VIN+ MODULE Rpullup PWM Enable I ON/OFF ON/OFF + VON /OFF Q2 10K Q1 GND 10K _ 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 14 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Over Current 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. Over Temperature Protection To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shutdown if the over temperature threshold of 140°C is exceeded at the thermal reference point Tref. The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart. Input Under-voltage 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 under voltage lockout turn-on threshold. Output Voltage Programming The output voltage of the SLIN-02E2Ax module can be programmed to any voltage from 0.6Vdc 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 below. The Lower Limit curve shows that for output voltages of 2.4V and higher, the input voltage needs to be larger than the minimum of 3V. 16 Input Voltage (v) 14 12 10 8 6 4 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Output Voltage (V) Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Output Trim Equations 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, use the following equation: ⎡ 6. 0 ⎤ Rtrim = ⎢ ⎥ kΩ ( ) 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. Table 1 VO, set (V) 1.0 1.2 1.5 1.8 2.5 3.3 5.0 Rtrim (KΩ) 15 10 6.67 5 3.16 2.22 1.36 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 SLIN-02E2Ax modules have 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 must not exceed 0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect the SENSE pin to the VOUT pin. 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 16 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Voltage Margining Output voltage margining can be implemented in the SLIN-02E2Ax 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. Vo Rmargin-down MODULE Q2 Trim Rmargin-up Rtrim Q1 GND Circuit Configuration for margining Output voltage Monotonic Start-up and Shutdown The SLIN-02E2Ax modules have 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 SLIN-02E2Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Power Good The SLIN-02E2Ax modules provide 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 over temperature, over current or loss of regulation occurs that would result in the output voltage going ±12.5% outside the set-point value. The PGOOD terminal should be connected through a pull-up resistor (suggested value 100KΩ) 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 17 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Tunable LoopTM The SLIN-02E2Ax modules have a new feature that optimizes transient response of the module called Tunable LoopTM. External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise 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. The Tunable LoopTM 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 SENSE and TRIM pins of the module, as shown below. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module. VOUT SENSE RTUNE MODULE CO CTUNE TRIM GND RTrim Circuit diagram showing connection of RTUNE 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 470uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE 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, 4, and 5 list 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 1A to 2A step change (50% of full load), with an input voltage of 12V, 5V, and 3.3V, respectively. 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Tunable LoopTM (continued) Table 2.General recommended values of RTUNE and CTUNE for Vin=12V/5V/3.3V and various external ceramic capacitor combinations. Co RTUNE CTUNE 1x47μF 220 3900pF 2x47μF 150 10nF 3x47μF 100 18nF 4x47μF 100 18nF 10x47μF 100 22nF Table 3.Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1A step load with Vin=12V. Vo 5V 3.3V 2.5V 1.8V 1.2V Co 1x22μF 1x47μF 2x47μF 2x47μF 3x47μF RTUNE CTUNE 220 2200pF 81mV 220 3900pF 61mV 150 10nF 35mV 150 10nF 34mV 100 18nF 23mV ΔV 0.6V 330μF Polymer 100 68nF 12mV Table 4.Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1A step load with Vin=5V. Vo 3.3V 2.5V 1.8V 1.2V Co 1x47μF 2x47μF 2x47μF 3x47μF RTUNE CTUNE 220 3900pF 62mV 150 10nF 35mV 150 10nF 34mV 100 18nF 23mV ΔV 0.6V 330μF Polymer 100 68nF 12mV Table 5.Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1A step load with Vin=3.3V. Vo 2.5V 1.8V 1.2V Co 3x47μF 2x47μF 3x47μF RTUNE CTUNE 100 18nF 48mV 150 10nF 34mV 100 18nF 23mV ΔV 0.6V 330μF Polymer 100 68nF 12mV 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Thermal Considerations 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. 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 point, Tref, used in the specifications is also shown below. For reliable operation the temperature at this point should not exceed 140oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). 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 20 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Example Application Circuit Requirements: Vin: Vout: Iout: ΔVout: Vin, ripple 12V 1.8V 1A max., worst case load transient is from 1A to 1.5A 1.5% of Vout (27mV) for worst case load transient 1.5% of Vin (180mV, p-p) Vin+ VIN Vout+ VOUT SENSE RTUNE + CI2 MODULE CI1 CTUNE Q3 ON/OFF GND CI1 CI2 CO1 CTune RTune RTrim CO1 TRIM RTrim 1x10μF/16V ceramic capacitor (e.g. TDK C Series) 100μF/16V bulk electrolytic 2x47μF/6.3V ceramic capacitor (e.g. TDK C Series, Murata GRM32ER60J476ME20) 5600pF ceramic capacitor (can be 1206, 0805 or 0603 size) 150Ω SMT resistor (can be 1206, 0805 or 0603 size) 5kΩ 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 21 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Mechanical Outline PIN 7 PIN 8 PIN 1 2 3 4 5 6 7 8 9 10 FUNCTION ON/OFF VIN GND VOUT SENSE TRIM GND NC NC PGOOD 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs January 14, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Mechanical Outline (continued) 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.) Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered using a reflow profile with a peak temperature of no more than 260ºC for less than 5 seconds. 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 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Packaging Details The SLIN-02E2Ax modules are supplied in tape & reel as standard. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: Inside Dimensions: Tape Width: 330.2 mm (13.00) 177.8 mm (7.00”) 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 24 NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs January 14, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Surface Mount Information Pick and Place The SLIN-02E2Ax 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 is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as part number and serial number. Nozzle Recommendations The 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 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. If assembly on the bottom side is planned, please contact Bel Power for special manufacturing process instructions. Lead Free Soldering The SLIN-02E2Ax 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. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). A 6 mil thick stencil is recommended. For questions regarding Land grid array (LGA) soldering, solder volume; please contact Bel Power for special manufacturing process instructions. The recommended linear reflow profile using Sn/Ag/Cu solder is shown in the figure on the next page. Soldering outside of the recommended profile requires testing to verify results and performance. MSL Rating The SLIN-02E2Ax modules have a MSL rating of 1. 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. 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 3Vdc - 14 Vdc Input, 0.6 Vdc - 5.5 Vdc /2 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. January 14, 2011 Surface Mount Information (Continued) 300 Per J-STD-020 Rev. C Peak Temp 260°C Reflow Temp (°C) 250 200 * Min. Time Above 235°C 15 Seconds Cooling Zone 150 Heating Zone 1°C/Second *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. Revision History Date Revision Changes Detail Approval 2010-11-19 A First release. T. Bubriski 2011-1-14 B Updated Table 3; Added Tables 4 and 5. T. Bubriski RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2011 Bel Fuse Inc. Specifications subject to change without notice.1/14/2011 26 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