SFD1200-12BG Front-End Preliminary Data Sheet DC Input, 12V Output, 1200 Watts Features RoHS compliant for all six substances Wide DC input range (-40 to -75 VDC) 1U or 2U height configurations Active current share with ORing FET on +12V 2 I C interface status and control Standby voltage of 3.3 VDC 3 A Overtemperature, overload, and overvoltage protection Variable-speed fan for low noise at low ambient temperatures Status LEDs: INPUT OK, OUTPUT OK, and FAULT Applications Datacom Distributed power systems Servers Description The SFD1200-12BG is a 1200-watt, DC-input front-end which has a main 12 VDC output for datacom, distributed power, and server applications, and provides a 3.3 VDC standby output. Its compact size enables mounting in both 1U and 2U height racks. High efficiencies, advanced thermal management techniques, and an internal fan increase reliability over a broad range of operating conditions. Internal ORing FETs facilitate use in hot-swap, redundant configurations. 2 Status is provided with front panel LEDs, logic signals, and via an I C management interface bus. In addition, the 2 I C bus can supply status information about the power supply including output current and voltage. The SFD1200-12G meets international safety requirements for ITE and is CE marked to the Low Voltage Directive (LVD). Model Selection Nominal Ripple & Output Maximum Noise Voltage Adjustment Minimum Load Output Current Regulation 20 MHz Model (VDC) Range (VDC) (A) (Amps) % BW (mV) SFD1200-12BG 12 N/A 0.5 99.2 3 100 3 3.35 (Standby) N/A 0 3 100 MCD10133 Rev. 1.1, 6-June-11 Page 1 of 8 www.power-one.com SFD1200-12BG Front-End Preliminary Data Sheet DC Input, 12V Output, 1200 Watts Input Specifications Parameter Conditions/Description Min. Nom. Max. Units DC Input Voltage Continuous input range. -40 -53 -75 VDC Hold-up Time On all outputs. -53 VDC 5 ms Input Current At full-rated load. -40 VDC 35 A Inrush Surge Current Excluding Xcap. 25 C 35 A pk Output Specifications Parameter Conditions/Description Min. Nom. Max. Units Efficiency With Vin at -40 VDC and 50% to 75% load on 90 % V1. NOTE: Internal fan is considered part of the With Vin at -40 VDC and 75% to 100% load on 90 % load as it is driven from V1. the 12V output Vaux load is set to 0.5A for With Vin at -70 VDC and 50% to 75% load on 91 % efficiency measurements. V1. With Vin at -70 VDC and 75% to 100% load on 91 % V1. Minimum Load Minimum loading required to maintain 0.5 A regulation. Output Power Input of -40 to -75 VDC: 1200 W Overshoot Output voltage overshoot at turn-on. Overshoot < 5 % lasts <5 ms. Transient Response Maximum recovery time to within 1% of initial set point due to a 25% load change, 1A/s. 12V output: 5 ms Standby output: 5 ms Maximum deviation: 12V output: 3 % Standby output: 3 % Turn-On Delay Time required for initial output voltage 3000 ms with PS ON signal stabilization after application of DC input or ON/OFF signal. Output Regulation See Model Selection data on page 1. MCD10133 Rev. 1.1, 6-June-11 Page 2 of 8 www.power-one.com