PFF3000-12-069RD is a 3 kW DC/DC front-end converter that provides a main output 12.5 VDC from -40 to -72 VDC bus voltages to power Intermediate Bus Architectures (IBA) in high-performance and high-reliability servers, routers, and network switches. Features include very high efficiency, high reliability, low output voltage noise, and excellent dynamic response to load / input changes. Best-in-class, platinum equivalent efficiency Input voltage range: -40 to -72 VDC Up to 3 kW output power - 244 A output current Hot-plug capable Parallel operation with active analog current sharing 2 Status LEDs: DC input OK and warning / fault signaling 3 High density design: 30.5 W/in Form factor: 555 x 69 x 42 mm (21.85 x 2.72 x 1.65 in) Full digital controls for improved performance RoHS Compliant Reverse polarity, over temperature, output overvoltage, and overcurrent protections I2C communication interface for control, programming, and monitoring with Power Management Bus protocol High Performance Servers Routers Switches 2 PFF3000-12-069RD PFF 3000 - 12 - 069 R D Option Code Product Family Power Level Dash V1 Output Dash Width Airflow Input Blank: Standard model 1 PFF Front-Ends 3000 W 12.5 V 69 mm R: Reversed D: DC 1 Front to Rear PFF3000-12-069RD power supply is a fully digital controlled, highly efficient front-end converter. It incorporates state-of-the-art technology and uses an interleaved forward converter topology with active clamp and synchronous rectification to reduce component stresses, thus providing increased system reliability and very high efficiency. With a wide DC input voltage range and minimal linear output power derating with ambient temperature, PFF3000-12-069RD maximizes power availability in demanding server, switch, and router applications. The frontend is fan cooled and ideally suited for server integration with a matching airflow path. Active OR-ing devices on the main output ensure no reverse load current and render the supply ideally suited for operation in redundant power systems. The standby output (12V/2A) provides power to external power distribution and management controllers. Its protection with an active OR-ing device provides for maximum reliability. Status information is provided with two front-panel LEDs. In addition, the power supply can be controlled via I2C bus. This allows full monitoring of the supply, including input and output voltage, current, power, and inside temperatures. Cooling is managed by a fan controlled by the DSP controller. The fan speed is adjusted automatically depending on the actual power demand and supply temperature and can be overridden through the I2C bus. Figure 1. PFF3000-12-0069RD Block Diagram tech.support psbel.com