Bus Converter
48V Input / 12V Output / 27A
07CM-27S12L
• • • • •
PRELIMINARY
Ideal for Intermediate Bus Architectures Industry standard quarter-brick package Up to 300W at 95% efficiency 1500V isolation Safety Agency Approvals
Description
The 07CM-27S “Cimarron” Series are isolated DC/DC converters that operate from a nominal 48V source. These converters are intended to provide isolation and step down to generate an intermediate bus for the purpose of powering non-isolated Point-of-Load (POL) converters. These units will provide up to 300W of output power from a 48V input. These units are designed to be highly efficient and very low cost and are thus unregulated. The downstream POL converters will provide the precise regulation required by the load. Features include remote on/off, over current protection and undervoltage lockout. These converters are provided in an industry standard quarter-brick package.
Part Selection
Output Voltage 12V Input Voltage 48V Max. Output Current 27A Max. Output Power 300W Typical Efficiency 95% Model Number 07CM-27S12L
Input Specifications
Parameter Input Voltage Range Input Current (no load) Input Current (full load) Reflected Ripple Current (pk-pk) Undervoltage Lockout Turn-on Turn off Overvoltage Lockout Min 36 VDC Typ Max 55 VDC 110mA 6.82A 50mA rms 100mA pk-pk Notes
with a 12uH source inductor at nom. Vin and full load.
35.8 VDC 33.8 VDC 57.1 VDC
Output Specifications
Parameter Output Voltage 36Vin 48Vin 55Vin Output Current Output Power Load Regulation Ripple and Noise 0A Min Typ 8.7V 11.7V 13.3V 27A 300W 0.4V 150mV pk-pk Max Notes Setpoint at no load.
0 to 20MHz Bandwidth Use 1.0uF ceramic cap and 100uF/50mOhm tantalum on output
Load Capacitance
100uF (50mohm)
3000uF
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
Bus Converter
48V Input / 12V Output / 27A
Output Specifications (continued)
Parameter Transient Response Max deviation Recovery to within ± 1% Min Typ 150mV 50uS Max 250mV 100uS Notes di/dt =0 .1A/uS, Vin =48VDC Ta = 25°C, 25% load change.
General Specifications
Parameter Switching Frequency Dimensions inches mm Weight Operating Temperature Non-Operating Temperature Overtemp Shutdown 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) Low: 0V to 0.4V High: 1.0 V to 18V 2.7ms (typ.) 4.3ms (typ.) UL / cUL Recognized Certified to EN60950 Latching 110% to 125% max Io UVLO Vin < 35.0 OVSD Vin>57.0 Specification 96kHz typical (fixed) 2.28 x 1.45 x 0.50 57.9 x 36.8 x 12.7 TBD -40°C to 70°C -55°C to 125°C 120°C (10°C hysteresis) Note: measured on Q4
Pin Connections
Pin 1 2 3 4 5 Function + Vin Remote On/Off - Vin - Vout + Vout
2003 Bel Fuse Inc. Specifications subject to change without notice. 121003
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
