NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output xRPF-20A1A0 RoHS Compliant Rev.A • Non-Isolated • Wide Trim Range • Fixed Frequency (275 kHz) • • High Efficiency Converter Can Sink and Source Current • High Power Density • OCP/SCP • Power Good Output Signal (open collector) • Remote On/Off • Low Cost • Under-Voltage Lockout (UVLO) Description The Bel xRPF-20A1A0 is a new high density open frame non-isolated converter series for space sensitive applications. Each model has a wide input range (10.2 Vdc - 13.8 Vdc) and offers a wide range of output voltage (0.9 Vdc - 5.0 Vdc) with a 20 A load. An external resistor adjusts the output voltage from its pre-set value of 0.9 Vdc to any value up to the 5.0 Vdc maximum. Typical efficiency is 92% at Vo=5 Vdc, Vin=12 Vdc at full load. Typical features include remote on/off, under-voltage lockout, over-current protection and short circuit protection. Part Selection Output Voltage 0.9 V - 5.0 V Input Voltage 12 V Max. Output Current 20 A Max. Output Power 100 W Typical Efficiency 92% Model Number Vertical Mount VRPF-20A1A0 Model Number Horizontal Mount 0RPF-20A1A0 Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging. 3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. Absolute Maximum Ratings Parameter Input Voltage (continuous) Min -0.3 V Typ - Max 13.8 V Output Enable Terminal Voltage 13.8 V -0.3 V - Ambient Temperature 0 °C - 80 °C Storage Temperature -40 °C - 125 °C Notes Input Specifications Parameter Input Voltage Input Current (Source) Min 10.2 V Typ - Max 13.8 V Vo=5.0 V Vo=2.5 V Vo=0.9 V - 9.1 A 4.9 A 2.2 A - Vo=2.5 V Vo=0.9 V - -3.44 A -0.97 A - Input Current (No Load) - 95 mA - Remote Off Input Current - 5 mA 10 mA Input Current (Sink) Notes Able to sink 20 A output current at any output voltage up to and including 2.5 V. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Input Specifications (continued) Parameter Input Reflected Ripple Current (pk-pk) Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=0.9 V Input Reflected Ripple Current (rms) Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=0.9 V External Input Capacitance Turn-on Voltage Threshold Turn-off Voltage Threshold Min Typ Max - 280 mA 250 mA 200 mA 150 mA 350 mA 320 mA 280 mA 250 mA 80 mA 70 mA 45 mA 40 mA 540 uF 9.0 V 7.6 V 120 mA 100 mA 80 mA 60 mA 9.5 V 8.3 V 8.5 V 7.0 V Notes Tested with simulated source impedance of 1.5 uH 5Hz to 20 MHz, and 2 × 270 uF/16 V Oscon capacitors (ESR ≤ 20 mΩ) at the input Note: All specifications are typical at 25 °C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Min -2.5%Vo,set Typ - Max 2.5%Vo,set Output Voltage Set Point -3.5%Vo,set - 3.5%Vo,set Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=0.9 V - - 0.4%Vo,set 0.4%Vo,set 0.5%Vo,set 1%Vo,set Line Regulation Output Ripple and Noise (pk-pk) Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=0.9 V Output Ripple and Noise (rms) Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=0.9 V Output Current Current Limit Threshold - - 0.5%Vo,set - 65 mV 60 mV 55 mV 45 mV 80 mV 75 mV 70 mV 55 mV 0A 25 A 18 mV 15 mV 15 mV 10 mV - 25 mV 25 mV 20 mV 15 mV 20 A 40 A Short Circuit Surge Transient - - 0.1 A s Turn on Time Overshoot at Turn on Output Capacitance - 5 mS 0%Vo 10 mS 3%Vo 680 uF 680 uF 680 uF - 5080 uF 7840 uF 11000 uF Notes Vin=12 V, lo=lomax, full load Over all operating input voltage, resistive load, and temperature conditions Load Regulation Vo=5.0 V Vo=2.5 V Vo=0.9 V Transient Response 50% ~ 75% Max Load Settling Time 75% ~ 50% Max Load Settling Time VO=0.9 V5.0 V - 100 mV 40 uS 100 mV 40 uS Io=Iomin to Iomax Vin=Vinmin to Vinmax Tested at 0-20 MHz BW, with a 680 uF/6.3 V Oscon capacitor (ESR ≤ 12 mΩ), 10uF/16V Tantalum capacitor, and 10nF ceramic capacitor at the output. 2 150 mV 80 uS 150 mV 80 uS di/dt=2.5 A/uS; Vin=12 V; with a 680 uF/6.3 V Oscon capacitor (ESR ≤ 12 mΩ), 10 uF/16 V Tantalum capacitor and 10 nF ceramic capacitor at the output. Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output General Specifications Parameter Efficiency (Current Source) Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=0.9 V Efficiency (Current Sink) Vo=2.5 V Vo=0.9 V Switching Frequency Output Voltage Trim Range Min Typ Max 89% 86% 83% 65% 92% 89% 86% 69% - 79% 60% 240 kHz 0.9 V 82% 63% 275 kHz - 310 kHz 5.0 V MTBF 5,570,000 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - Notes Measured at Vin=12 V, full load. Vo=0.9 V when the Trim pin is open. Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) 1.2 x 1.1 x 0.457 30.48 x 27.94 x 11.6 VRPF-20A1A0 1.2 x 1.1 x 0.508 30.48 x 27.94 x 12.91 15 g 0RPF-20A1A0 - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Power Good Power Good Delay Min Typ Max -0.3 V 2.4 V - 0.8 V 13.8 V - - 8 mS 1 Notes Remote On/Off pin open, unit on. Note: All specifications are typical at 25 °C unless otherwise stated. 1. The power good signal is an open collector output. When the output of the module reaches 90% of the nominal set point, the power good pin is set high. Output Trim Equations Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground. Trim values should not be less than 280Ω. Rtrim = 1.17 Vadj − 0.9 Vout Module Trim Rtrim GND Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The Trim Up voltage should be connected between the Trim pin and Ground. Vout Rs × (1.3Vt − 1.17 ) Rt = 1.17 − Rs × (Vadj − 0.9 ) Module Rt Trim Rs GND Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com Vt NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Efficiency Data 5.0V Vout(SOURCE) Efficiency 93.0% 90.0% 10.2V 12.0V 13.8V 87.0% 84.0% 81.0% 78.0% 2.0 5.0 10.0 15.0 20.0 Output Current (A) 2.5V Vout(SOURCE) 91.0% Efficiency 88.0% 85.0% 10.2V 12.0V 13.8V 82.0% 79.0% 76.0% 73.0% 2.0 5.0 10.0 Output Current (A) 15.0 20.0 0.9V Vout(SOURCE) 85.0% 80.0% Efficiency 75.0% 70.0% 65.0% 10.2V 12.0V 13.8V 60.0% 55.0% 50.0% 2.0 5.0 10.0 Output Current (A) 15.0 20.0 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Thermal Derating Curves Vo=5 V; Vin=12 V Vo=2.5 V; Vin=12 V Vo=0.9 V; Vin=12 V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Ripple and Noise Waveforms 12 V input, 5.0 V output 12 V input, 2.5 V output 12 V input, 0.9 V output Note: Ripple and noise at full load, 0-20MHz BW, with 680 uF/6.3 V Oscon cap, 10 uF/16 V Tan cap and 10 nF ceramic cap at the output, Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Transient Response Waveforms 75% to 50% load step, 5.0 Vdc output 50% to 75% load step, 5.0 Vdc output 75% to 50% load step, 2.5 Vdc output 50% to 75% load step, 2.5 Vdc output 75% to 50% load step, 0.9 Vdc output 50% to 75% load step, 0.9 Vdc output Note: Transient response at di/dt=2.5 A/uS, with a 680 uF/6.3 V Oscon cap, a 10 uF/16 V Tan cap and a 10 nF ceramic cap at the output, Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Mechanical Outline VRPF-20A1A0 Pin Connections Pin Function 1 Vout 2 Vout 3 Vout 4 Trim 5 Remote On/Off 6 Power Good 7 Ground 8 Ground 9 Reserved 10 Vin 11 Vin Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 5.0 Vdc/20 A Output Mechanical Outline (continued) 0RPF-20A1A0 Pin Connections Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 Function Vout Vout Vout Trim Remote On/Off Power Good Ground Ground Pwrgd_set Vin Vin Support Pin Support Pin RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2007 Bel Fuse Inc. Specifications subject to change without notice. 020507 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