Electronic Products & Technology


Conduction cooled 504W rated ac-dc power modules offer PMBus communication

TDK-LAMBDA PFH500F-28 ac-dc power modules are rated at 28V 504W and provide a compact 4” x 2.4” footprint and have optional Read/Write programming and communication through a PMBus interface. The third generation power supplies are suitable for a variety of applications including COTS (Commercial-Off-The-Shelf), power amplifiers, LED displays and test equipment. Product series utilizes GaN semiconductors, bridgeless power factor correction, synchronous rectification and digital control, enabling efficiencies of up to 92%. Opto-couplers have been replaced by digital isolators for long term reliability and stability. Accepting an 85 to 265Vac input, devices deliver 28V at 18A and can be adjusted from 22.4 to 33.6V using the trim pin or PMBus interface. Baseplate cooling allows operation at temperatures ranging from -40 to +100°C. The metal enclosure measures 4 x 2.4 x 0.53” (101.6 x 61.0 x 13.3mm) and is encapsulated for MIL-STD-810G shock and vibration.

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