PFH500F-28 Series Compact, Conduction Cooled 504 W

By TDK-Lambda Americas, Inc. 159

PFH500F-28 Series Compact, Conduction Cooled 504 W

TDK Corporation's conduction cooled TDK-Lambda PFH500F-28 AC/DC power modules are rated at 28 V 504 W and feature a compact 4" x 2.4" footprint. They have optional Read/Write programming and communication through a PMBus™ interface. These third-generation power supplies are ideal for a variety of applications including COTS (commercial-off-the-shelf), power amplifiers, LED displays, and test equipment.

The PFH500F-28 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 Opto-couplers have been replaced by digital isolators for long term reliability and stability.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 VAC to 265 VAC input, the modules deliver 28 V at 18 A and can be adjusted from 22.4 V to 33.6 V using the trim pin or PMBus interface. Baseplate cooling allows operation at temperatures ranging from -40°C to +100°C. The metal enclosure measures 4" x 2.4" x 0.53" (101.6 mm x 61.0 mm x 13.3 mm) and is encapsulated for MIL-STD-810G shock and vibration.

Features and options include a 12 V standby voltage with 200 mA (or 2.4 W) capability, remote on/off, pre-biasing start-up, droop mode current share, a DC Good signal, various protections (OVP, UVP, OCP, OTP), and a PMBus interface. The interface can be used to program (read-write) the output voltage and fault management functions and monitor the unit's operating status.

The series has been certified to the IEC/UL/CSA/EN 60950-1 safety standards (62368-1 pending) and carries the CE mark 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.

Features
  • 4" x 2.4" footprint
  • High efficiency: up to 92%
  • PMBus interface
  • Parallel capability (droop mode)

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