New models added to conduction-cooled AC/DC power module series

14-03-2022 | TDK | Power

TDK Corporation has introduced 12V and 48V output models to the TDK-Lambda brand PFH500F series of high-efficiency AC/DC power modules. The series, rated at 504W, can be conduction-cooled to a cold plate for outdoor applications. The power modules can be programmed (read/write) or remotely monitored (read) through the industry-standard PMBus interface. The series provides outstanding COTS performance, LED signage, power amplifiers, and test and measurement equipment.

The PFH500F-12 and PFH500F-48 employ the latest technologies, including GaN semiconductors, bridgeless power factor correction and digital control to attain efficiencies of up to 92%. Digital isolators substitute traditional optocouplers for long-term stability and reliability.

Operating from a wide range of 85VAC to 265VAC input, the PFH500F-12 will provide 42A at 12V with an adjustment capability of 9.6-14.4V utilising the trim pin or the PMBus interface. The PFH500F-48 provides 10.5A at 48V and can be adjusted from 38.4-52.8V. The modules include a baseplate temperature range of -40C to +100C and measure 101.6mm x 61mm x 13.5mm (L x W x H).

Product features and options comprise droop mode current share, a 12V auxiliary standby output, remote on/off, remote sense, an open collector power good signal and output trim. The PMBus can be employed to program the output voltage, activate the remote on/off, change the under/over-voltage, over-current and over-temperature set points, plus read-back input and output current, input voltage and internal temperature.


The input to output isolation is 3000VC, input to case 2500VAC and 1500VDC output to case. Safety certification is to the IEC/UL/CSA/EN 62368-1 standards with CE and UKCA marking for the Low Voltage and RoHS Directives. For simplicity of testing, fully populated evaluation boards are available.

By Natasha Shek