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| NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Vref/2 / 10 A Output VRPC-10AT5x * * * * Non-Isolated High Efficiency High Power Density Low Cost RoHS Compliant * * * * Remote On/Off Rev.A Under-voltage Lockout (UVLO) OCP/SCP Remote Sense Description The VRPC-10AT5x is a non-isolated step down dc/dc converter that operates from a nominal 12 V source. This converter is designed specifically to provide bus termination voltages in applications such as DDR (double data rate) memory where the bus termination voltage must closely track the I/O bus voltage. The converter accepts a reference input and uses this to program its output voltage to 50% of the reference. The unit is packaged in an industry-standard single-in-line footprint and provides a maximum 10 A output. Standard features include remote on/off, input under-voltage lockout, over current protection and remote sense. Replace "x" in the part number with "S" or "A" depending on your specific application and specific external capacitor bank. Part Selection Output Voltage Vref/2 Vref/2 Input Voltage 12 V 12 V Max. Output Current 10 A 10 A Max. Output Power 25 W 25 W Typical Efficiency 82% 82% Model Number VRPC-10AT5S VRPC-10AT5A Notes: 1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. 2. Add "G" suffix at the end of the model number to indicate "Tray Packaging". See page 5 for model number differences. Absolute Maximum Ratings Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V 0 C -40 C Typ Max 15 V 15 V 70 C 100 C Notes Input Specifications Parameter Input Voltage Input Current (full load) Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold 2 Min 10.8 V 8.0 V Typ 3 0.08 A s 9.7 V 8.8 V 2 Max 13.2 V 2.1 A 50 mA 15 mA 180 mA 50 mA 0.16 A s 10 V 2 Notes Tested with a 470 uF/16 V input capacitor with ESR=0.03 ohm max at 100 kHz & simulated source impedance of 500 nH, 5 Hz to 20 MHz. Note: All specifications are tested at Vref =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 Vref/2 / 10 A Output Output Specifications Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (0 C to 70 C) Output Current Current Limit Threshold Short Circuit Surge Transient Output Ripple and Noise (pk-pk) Output Ripple and Noise (rms) Turn on Time Overshoot at Turn on Output Capacitance Transient Response -50% ~ 50% Max Load Settling Time 50% ~ -50% Max Load Settling Time VO= Vref/2 V 100 mV 40 uS 100 mV 40 uS 150 mV 70 uS 150 mV 70 uS Test conditions: di/dt = 0.1 A/uS; Vin = 12 V; with a 470 uF electrolytic capacitor at the output Min 0.98 (Vref/2) V 0A 13 A 470 uF Typ Vref/2 V 3 mV 3 mV 5 mV 0.35 A s 45 mV 11 mV 50 mS 0% 2 Max 1.02 (Vref/2) V 10 mV 10 mV 20 mV 10 A 25 A 0.7 A s 100 mV 25 mV 80 mS 3% 5600 uF 2 Notes Vin=12 V, Iout= full load Test conditions: 0-20 MHz BW, 0.1 uF ceramic capacitor at the output Notes: 1. All specifications are typical at nominal input, full load at 25 C unless otherwise stated. 2. All specifications are tested at Vref=2.5 V. General Specifications Parameter Efficiency (Vin=12 V, Io=Io-max ) Switching Frequency MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Remote sense compensation Weight 2.5 x 0.55 x 0.37 63.5 x 13.97 x 9.4 9.5 g 0.5V Min 80% 180 kHz Typ 82% 200 kHz 3,403,119 hours Max 220 kHz Calculated Per Bell Core SR-332 (IO = 80% load; Vin=12 V; Ta = 25 C) Notes Note: All specifications are typical 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 Vref/2 / 10 A Output Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) -0.3 V 2.8 V 0.3 V 13.2 V Min Typ Max Notes Efficiency Data Module 1.25V 90.0% 85.0% EFFICIENCY 80.0% 75.0% 70.0% 65.0% 60.0% 1.0 3.0 5.0 7.0 OUTPUT CURRENT 9.0 10.8V 12.0V 13.2V Thermal Derating Curve 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 Vref/2 / 10 A Output Ripple and Noise Waveform Note: Ripple and noise at full load, 12 Vdc input and Ta=25 deg C. Transient Response Waveforms -50% to 50% load Transient at 12V input 50% to -50% load Transient at 12V input Note: Transient response at di/dt=0.5 A/uS, with external load capacitance Co=470 uF(electrolytic), and 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 Vref/2 / 10 A Output Mechanicl Outline Pin Connections Pin 1 2 3 4 5 6 7 8 9 10 11 Function Vo+ Vo+ Opt. Remote Sense (+) Vo+ Ground Ground Vin+ Vin+ Not used Vref Remote On/Off Model Number Description VRPC-10AT5S: Designed to accept its reference input from a G7NB-81A180. For use with other reference inputs, consult factory. Compensated for 1 x 560 uF Oscon external capacitor. VRPC-10AT5A: Designed to accept its reference input from a V7XE-20AS20. For use with other reference inputs, consult factory. Compensated for 12 x 100 uF ceramic in parallel with 2 X 820 uF Oscon in parallel with 16 X 4.7 uF ceramic. RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. (c)2007 Bel Fuse Inc. Specifications subject to change without notice. 011907 CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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 |
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