TDK Corporation announces the introduction of 12 V and 48 V output models to the conduction-cooled TDK-Lambda brand PFH500F series of AC-DC power modules. The power supplies are rated at 504 W, feature a compact 4” X 2.4” footprint with programming and communication through a PMBus interface. These power supplies are ideal for a variety of applications including COTS applications, power amplifiers, LED displays, and test equipment.

The PFH500F 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 Opto-couplers have been replaced by digital isolators for long-term reliability and stability.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 265 Vac input, the modules deliver 12 V at 42 A or 48 V at 10.5 A and can be adjusted from 9.6 to 14.4 V or 38.4 to 52.8 V using the trim pin or PMBus interface. The droop mode current share option enables modules to be connected in parallel for additional power. 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 13.3 mm) and is encapsulated for MIL-STD-810G shock and vibration.

Features include a 12 V 200 mA standby voltage, remote on/off, pre-biasing start-up, droop mode current share, a Power Good signal, output trim pin, and a PMBus interface. The PMBus can be used to program the output voltage and fault management functions and monitor the unit’s operating status. The PFH500F series is fully protected against over-voltage, under-voltage, over-current, and over-temperature conditions.

The series has been certified to the IEC/UL/CSA/EN 62368-1 safety standards and carries the CE and UKCA marks for the Low Voltage and RoHS Directives. Input to ground isolation is 2,500 Vac, input to output 3,000 Vac, and output to case 1,500 Vdc.

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