ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/27 A Output, 1/4 Brick 0RCM-27S12L RoHS Compliant • Industry standard quarter-brick package • Up to 300 W at 95% efficiency • 1500 V isolation • Safety Agency Approvals Rev.A Description The 0RCM-27S “Cimarron” Series are isolated DC/DC converters that operate 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 300 W of output power from a nominal 48 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 Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number 12 Vdc 48 Vdc 27 A 300 W 95% 0RCM-27S12L 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. Input Specifications Parameter Min Typ Max 36 V - 55 V Input Current (no load) - - 110 mA Input Current (full load) - - 6.82 A Reflected Ripple Current (rms) - - 50 mA Reflected Ripple Current (pk-pk) - - 100 mA - 35.8 V 33.8 V 57.1 V - Input Voltage Range Notes with a 12uH source inductor at nom. Vin and full load. Under-voltage Lockout Turn-on Turn off Over-voltage Lockout 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/27 A Output, 1/4 Brick Output Specifications Parameter Output Voltage 36Vin 48Vin 55Vin Output Current Output Power Load Regulation Min Typ Max 0A - 8.7 V 11.7 V 13.3 V - 27 A 300 W 0.4 V - - 150 mV 100 uF (50mohm) - 3000 uF - 150 mV 50 uS 250 mV 100 uS Ripple and Noise (pk-pk) Load Capacitance Transient Response Max deviation Recovery to within ± 1% Notes Setpoint at no load. 0 to 20 MHz Bandwidth, use 1.0 uF ceramic cap and 100 uF/50mOhm tantalum on output di/dt =0 .1 A/uS, Vin =48 V Ta = 25 °C, 25% load change. General Specifications Min Typ Switching Frequency - 96 kHz - Weight - TBD - Operating Temperature -40 °C - 70 °C Non-Operating Temperature -55 °C - 125 °C - 120 °C - Parameter Overtemp Shutdown Dimensions Inches (L × W × H) Millimeters (L × W × H) Protection Features Short circuit Over current Undervoltage Overvoltage Remote On/Off Active Low (Optional Active High) Turn on delay Outupt voltage rise time Safety Agency Approvals (pending) Max Notes fixed 10 °C hysteresis measured on Q4 2.28 x 1.45 x 0.50 57.9 x 36.8 x 12.7 Latching 110% to 125% max Io UVLO Vin < 35.0 OVSD Vin>57.0 0V 1.0 V - 2.7 ms 4.3 ms 0.4 V 18 V - UL / cUL Recognized Certified to EN60950 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/27 A Output, 1/4 Brick Mechanical Drawing Pin Connections Pin Function 1 + Vin 2 Remote On/Off 3 - Vin 4 - Vout 5 + Vout 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. 110308 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