TDK-Lambda expands AC/DC GaN power module family

TDK-Lambda, a group company of TDK, has expanded its GaN-based PFH500F AC/DC GaN power module family with two new models based on the Transphorm TP65H070LDG 72 mΩ GaN FETs in 8 × 8 PQFN packages. The new PFH500F-12 and PFH500F-48 are the second and third modules in TDK’s series of 500-watt AC/DC power supplies, providing 12-V and 48-V power outputs, respectively.

Like their predecessor, the GaN-based 28-V PFH500F-28, these new AC/DC GaN power modules deliver GaN benefits, including a six percent efficiency increase in a 13 percent smaller device package (from 116.8 × 61 mm to 101.6 × 61 mm). Together, these benefits translate into a 38 percent power density (> 100 W/in^3) improvement when compared to the PFE500SA-12 and PFE500SA-48, TDK-Lambda’s silicon-based 12-V and 48-V modules.

The new power modules also allow for the use of smaller external capacitors. They also add a PMBus interface with read/write capability for remote monitoring and programming. The operating temperature range is -40°C to 100°C.

The Transphorm power transistors’ high power density enabled TDK to cool the GaN power supplies via thin baseplates, enabling the power modules to support a variety of industrial applications operating in harsh environments, said Transphorm. Applications include commercial off-the-shelf (COTS) power supplies, custom fanless power supplies, 5G communication, laser, digital signage/displays, and signaling. The PFH500F series will be on display at APEC 2022 in booth #825.