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ISOLATED DC/DC CONVERTERS
48 VDC Input 12 VDC/27 A Output, 1/4 Brick
0RCM-27S12L
* * * *
RoHS Compliant
Rev.A
Industry standard quarter-brick package Up to 300 W at 95% efficiency 1500 V isolation Safety Agency Approvals
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 12 Vdc Input Voltage 48 Vdc Max. Output Current 27 A Max. Output Power 300 W Typical Efficiency 95% Model Number 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 Input Voltage Range Input Current (no load) Input Current (full load) Reflected Ripple Current (rms) Reflected Ripple Current (pk-pk) Under-voltage Lockout Turn-on Turn off Over-voltage Lockout 35.8 V 33.8 V 57.1 V Min 36 V Typ Max 55 V 110 mA 6.82 A 50 mA 100 mA with a 12uH source inductor at nom. Vin and full load. Notes
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 Ripple and Noise (pk-pk) Load Capacitance Transient Response Max deviation Recovery to within 1% Min 0A 100 uF (50mohm) Typ 8.7 V 11.7 V 13.3 V 150 mV 50 uS Max 27 A 300 W 0.4 V 150 mV 3000 uF 250 mV 100 uS di/dt =0 .1 A/uS, Vin =48 V Ta = 25 C, 25% load change. Notes
Setpoint at no load.
0 to 20 MHz Bandwidth, use 1.0 uF ceramic cap and 100 uF/50mOhm tantalum on output
General Specifications
Parameter Switching Frequency Weight Operating Temperature Non-Operating Temperature Overtemp Shutdown Dimensions Inches (L x W x H) Millimeters (L x W x 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) Min -40 C -55 C Typ 96 kHz TBD 120 C 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 Max 70 C 125 C 10 C hysteresis measured on Q4 fixed Notes
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 1 2 3 4 5 Function + Vin Remote On/Off - Vin - Vout + Vout
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products.
(c)2008 Bel Fuse Inc. Specifications subject to change without notice. 110308
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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