The PET800-12-074xA is an 800 Watts, 1 U form factor power supply module with Active PFC (Power Factor Correction) and Power Management Bus. It converts standard AC mains power into a main output of 12 V for powering intermediate bus architectures (IBA) in high performance and reliability servers, routers, and network switches. The PET800-12-074xA meets international safety standards and displays the CE-Mark for the European Low Voltage Directive (LVD). Best-in-Class, 80 PLUS Certified Platinum Efficiency Wide Input Voltage Range 90-264 VAC AC Input with Power Factor Correction Always-On 24 W Standby Output (12 V / 2 A) Hot-Plug Capable Parallel Operation with Active Digital Current Sharing DC-DC Digital Controls for Improved Performance 3 High Density Design 25 W/in Small Form Factor 185 x 73.5 x 39 mm (7.28 x 2.89 x 1.53 in) Power Management Bus Communications Protocol for Control, Programming and Monitoring Over Temperature, Output Over Voltage and Over Current Protection One DC OK Signaling Status LED High Performance Servers Routers Network Switches 2 PET800-12-074xA Series PET 800 - 12 - 074 x A Product Family Power Level Dash V1 Output Dash Width Airflow Input N: Normal PET 800 W 12 V 74 mm A: AC R: Reversed The PET800-12-074 AC-DC power supply is a mainly DSP controlled, highly efficient front-end. It incorporates resonance-soft- switching technology and interleaved power trains to reduce component stresses, providing increased system reliability and very high efficiency. With a wide input operating voltage range, the PET800-12-074 maximizes power availability in demanding server, network switch, and router applications. The front-end is fan cooled and ideally suited for server integration with a matching airflow path. The PFC stage is controlled using interleaved Critical mode to guarantee best efficiency and unity power factor over a wide operating range. The DC-DC stage uses soft switching resonant technology in conjunction with synchronous rectification. An active OR-ing device on the output ensures no reverse load current and renders the supply ideally suited for operation in redundant power systems. The always-on standby output, provides power to external power distribution and management controllers. It is protected with an active OR-ing device for maximum reliability. Status information is provided with front-panel LED. In addition, the power supply can be controlled and the fan speed set via the I2C bus. It 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. PET800-12-074 Block Diagram tech.support psbel.com