The PET800-12-074xD is an 800 Watt DC to DC power supply that converts -40 to -72 VDC voltage into an insulated main output of +12 VDC for powering intermediate bus architectures (IBA) in high performance and reliability servers, routers, and network switches. The PET800-12-074xD utilizes digital control architecture for greater efficiency, control and functionality. This power supply meets international safety standards and displays the CE-Mark for the European Low Voltage Directive (LVD). High Efficiency to 94% at 50% load Wide input voltage range: -40 to -72 VDC Always-On 24 W standby output (12 V/2 A) Hot-plug capable Parallel operation with active current sharing Digital controls for improved performance 3 High density design: 25 W/in Small Form Factor 73.5 x 39.0 x 185 mm 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 Networking Switches High Performance Servers Routers PET800-12-074xD 2 PET 800 - 12 - 074 x D Product Family Power Level Dash V1 Output Dash Width Airflow Input N: Normal PET Front-Ends 800 W 12 V 73.5 mm D: DC R: Reverse The PET800-12-074xD DC/DC power supply is a DSP controlled, high efficiency front-end power supply. It incorporates state-of- the art technology and uses a forward converter topology with active clamp and synchronous rectification to reduce component stresses, thus providing increased system reliability and high efficiency. With a wide input DC voltage range the PET800-12-074xD maximizes power availability in demanding server, network, and other high availability applications. The supply is fan cooled and ideally suited for integration with a matching airflow path. 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 a front-panel LED. In addition, the power supply can be controlled and the fan speed set via 2 2 the I C bus. The I C bus 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 2 power demand and supply temperature and can be overridden through the I C bus. Figure 1. Block Diagram Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-term reliability, and cause permanent damage to the supply. PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Vi maxc Maximum Input Voltage Continuous -75 VDC tech.support psbel.com