Efficient air-cooled AC/DC power supply for distributed power systems

TDK Corporation has introduced the TDK-Lambda TPF45000-385 three-phase input, non-isolated 45kW AC/DC power supply. The device offers a stable 385VDC output for large, distributed power systems using isolated DC-DC converters for semiconductor test and burn-in, large scale printers and other industrial equipment. With an efficiency of 98%, less internal waste heat is produced, enabling cooling by internal, variable speed fans. Cooling this way bypasses the requirement for expensive and complex water-cooling systems.

The device can function from either a Delta or Wye 360-528VAC three-phase input and at full load in ambient temperatures from -10C to +50C (-20C start-up). Internally, the power supply includes up to ten 4.5kW modules, permitting easy configuration of lower power systems. The rack-mount enclosure measures 450mm wide (excluding side rack mount flanges), 113mm high (less than 3U) and 533mm deep and weighing 30kg.

For remote monitoring, DC good, dropped phase and fault alarm, isolated signals are available, along with a remote on/off capability and a 13 to 15V 0.5A auxiliary output. Also, the PMBus and USB communications interfaces are provided to monitor the input voltage, output voltage, output current, internal temperature, status signals and fan status or to inhibit or allow the output voltage.

The device is certified to the IEC/EN/UL/CSA 62368-1 safety standards and has the CE and UKCA marks to the Low Voltage, EMC and RoHS Directives. It also complies with EN55032-A (conducted and radiated emissions), SEMI F47-0706 (line dips) and IEC 61000-4 (immunity). The input to ground isolation is 2,000VAC.