Bus Converter 48V Input / 12V Output / 20A 07CM-20S/30S Series PRELIMINARY • Ideal for Intermediate Bus Architectures • Industry standard quarter-brick package • • Up to 240W at 96% efficiency 1500V isolation • Remote on/off • • Low cost Safety Agency Approvals Description The 07CM-20S “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 240W of output power from a nominal 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 8V Input Voltage 48V 48V Max. Output Current 20A 30A Max. Output Power 240W 240W Typical Efficiency 96% 96% Model Number 07CM-20S12L 07CM-30S08L Change last character in part number from “0” to “H” for Active High On/Off Logic (e.g. 07CM-20S12H) Input Specifications Parameter Input Voltage Range Input Current (no load) Input Current (full load) Reflected Ripple Current (pk-pk) Min 36 VDC Typ Max 55 VDC 80mA 5.3A 50mA rms 100mA pk-pk Notes Reflected ripple current through a 12uH source inductor at nominal input voltage and rated load current. Output Specifications Parameter Output Voltage 07CM-20S12x 07CM-30S08x Output Current 07CM-20S12x 07CM-30S08x Load Regulation Ripple and Noise Min Typ Max 36V in 48V in 55Vin 8.8V 5.8V 12.0V 8.0V 14.0V 9.4V 0A 0A 20A 30A 5% 100mV pk-pk 45mV rms Notes Setpoint at no load. 0 to 20MHz Bandwidth Use 1.0uF ceramic cap and 15uF/100mOhm tantalum on output 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 / 20A Output Specifications (continued) Parameter Min Transient Response Max deviation Recovery to within ± 1% Typ Max 200mV 50uS 350mV 100uS General Specifications Parameter Switching Frequency Dimensions di/dt =0 .1A/uS, Vin =48VDC Ta = 25°C, 25% load change. Pin Connections Specification 120kHz typical (fixed) inches mm 2.28 x 1.45 x 0.50 57.9 x 36.8 x 12.7 42g (1.5oz) 0°C to 70°C Non-Operating Temperature MTBF (MIL-HDBK-217K) Protection Features Short circuit Over current Undervoltage Remote On/Off Active Low (Optional Active High) Safety Agency Approvals (pending) -55°C to 125°C >1,000,000 hours Weight Operating Temperature Notes Pin 1 2 3 4 5 Function + Vin Remote On/Off - Vin - Vout + Vout Continuous 120% to 140% max Io UVLO Vin < 39.0 Low: 0V to 0.8V High: 2.4V to 18V UL / cUL Recognized Certified to EN60950 100.00% 2.28” 95.00% 90.00% 1 85.00% + Vout + Vin 2 on/off 3 - Vin 5 80.00% 1.45” - Vout 4 75.00% 70.00% 65.00% 60.00% 1 Top View 2.5 5 10 15 20 Efficiency vs. Output Current (A) 2003 Bel Fuse Inc. Specifications subject to change without notice. 011303 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