ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/55A Output, 1/4 Brick 0RCM-55S12x RoHS Compliant PRELIMINARY Rev.D • Isolated • Input Under-Voltage Lockout • High Efficiency • Input Over-Voltage Shutdown • High Power Density • OCP/SCP • Low Cost • Remote On/Off • Over Temperature Protection Description The 0RCM-55S12x is isolated DC/DC onverter that operates from a nominal 48 VDC source. These converters use a full bridge power train to provide isolation and step down. These units will provide up to 600 W of output power from a nominal 55 VDC input. These units are designed to be highly efficient and low cost. Features include remote on/off, over current protection and under voltage lockout. These converters are provided in an industry standard quarter -brick package. Part Selection Output Voltage 12 Vdc Input Voltage 48 Vdc Max. Output Current 55 A Max. Output Power 600 W Typical Efficiency 97% Model Number Active Low 0RCM-55S12L Model Number Active High 0RCM-55S120 Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging. 2. 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) Remote On/Off (Active Low) Remote On/Off (Active High) Min -0.3 V Typ - Max 80 V Non-operating -0.3 V - 57 V Operating 1V - 18 V Module Off -0.3 V - 0.6 V Module On 1V - 18 V Module On Module Off -0.3 V - 0.6 V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Min 38 V Typ - Max 55 V Input Current (full load) - - 14.5 A Input Current (no load) - 80 mA 150 mA Remote Off Input Current - 5 mA 10 mA Notes Input Specifications Parameter Input Voltage Input Reflected Ripple Current (pk-pk) - 40 mA 100 mA Input Reflected Ripple Current (rms) - 30 mA 50 mA I2t Inrush Current Transient - TBD - Notes Vin=38 V Active High Tested with simulated source impedance of 12 uH, 5 Hz to 20 MHz; use a 100 uF/100 V electrolytic capacitor and 1 uF/100 V ceramic capacitor at the input. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/55A Output, 1/4 Brick Input Specifications (continued) Parameter Input Over-Voltage Protection Threshold Min 58 V Typ 59 V Max 60 V Notes Turn-Off Voltage Threshold Input Over-Voltage Protection Threshold Turn On Voltage Threshold 57 V 58 V 59 V Turn-On Voltage Threshold 33 V 34.5 V 36 V Turn Off Voltage Threshold 32 V 33.5 V 35 V Note: All specifications are typical at 25 °C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Vin=38 V Vin=48 V Vin=55 V Load Regulation Min Typ Max 9.30 V 11.80 V 13.55 V - 9.50 V 12.0 V 13.75 V 400 mV 9.70 V 12.20 V 13.95 V 600 mV - 300 mV 400 mV 0A - 55 A Regulation Over Temperature (-40 °C to +85 °C) Output Current Operating Output Power Range 0W - 600 W 110% 125% 140% Short Circuit Surge Transient - TBD - Ripple and Noise (rms) - 25 mV 60 mV Ripple and Noise (pk-pk) - 120 mV 200 mV Turn on Time - 20 mS 35 mS Overshoot at Turn on - 0% 3% 0 uF - 5000 uF - 4% - Current Limit Threshold Output Capacitance Load sharing ( 2 units) Notes lo=no load Vin=55 V Test conditions: 0-20 MHz BW, with a 1 uF ceramic capacitor at the output. Transient Response 50% ~ 75% Max Load 75% ~ 50% Max Load Overshoot Settling Time Overshoot Settling Time Vin=48 V - - 500 mV - - 200 uS - - 500 mV - - 200 uS Test conditions: di/dt = 1 A/uS, Vin=48 V, with a 1 uF ceramic capacitor at the output. 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 ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/55A Output, 1/4 Brick General Specifications Parameter Min - Typ 97% Max - Switching Frequency 96 kHz 125 kHz - Isolation Capacitance - 1500 pF - Isolation Voltage - 1500 V - Over Temperature Protection - 120 °C - Efficiency MTBF Notes Vin=48 V, full load Calculated Per Bell Core SR-332 (Vin=48 V; IO=80% full load; Ta = 25 °C) TBD Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 2.30 x 1.45 x 0.50 58.42 x 36.83 x 12.70 75 g - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Min Typ Max 1V - 12 V -0.3 V - 0.6 V 1V - 12 V -0.3 V - 0.6 V Notes Remote On/Off Signal High (Unit On) Active Low Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit Off) Active High The remote on/off pin is open: If active low, the Unit Off; If active high, the Unit On. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/55A Output, 1/4 Brick Efficiency Data 99.00% 98.00% Efficiency 97.00% 38 V 48 V 55V 96.00% 95.00% 94.00% 93.00% 92.00% 5 A 10A 15 A 20A 25 A 30A 35A 40A 45A 50A 55A Output current 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 ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/55A Output, 1/4 Brick Ripple and Noise Waveform Note: Ripple and noise at full load, 48 Vdc input, with 1uF ceramic cap at output and Ta=25 deg C. Transient Response Waveforms 50% to 75% load Transient at 48 Vdc input 75% to 50% load Transient at 48 Vdc input Note: Transient Response at 48 Vdc input, di/dt=1 A/uS, Cout=1uF ceramic cap, 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 ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/55A Output, 1/4 Brick Mechanical Outline Pin Connections Pin 1 2 3 4 5 6 7 Function Vin+ On/Off VinVout+ VoutVout+ Vout- Pin Size 0.040’’ 0.040’’ 0.040’’ 0.062’’ 0.062’’ 0.062’’ 0.062’’ Note: The heat sink can be customer made. RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2008 Bel Fuse Inc. Specifications subject to change without notice. 121808 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