Vishay Sfernice PLA51 planar transformer

Vishay Intertechnology has introduced a planar transformer offering power from 1 to 3 kW in a compact 70 x 53 x 22 mm size. Compared to devices built on traditional winding technology, the Vishay Sfernice PLA51 is said to deliver the same power transfer/conversion while offering higher efficiency and a lower weight and profile.

The device is optimised for DC/DC power converters, onboard chargers for electric vehicles, UPSs, power control cooling units and solar inverters. In these applications, its high typical efficiency of >99% typical reduces losses, while its low profile of 22 mm saves space in subassemblies. In addition, the transformer’s reduced weight of 170 g is a key parameter for power supplies in avionics applications.

Providing good repeatability, the product features a frequency range of 50 to 400 kHz and operates over a temperature range from -55 to +125°C with heatsink dissipation. Offered in full-bridge, half-bridge and forward power supply topologies, the transformer features tapped outputs for fast and easy connection. The RoHS-compliant device is also available in custom designs on request.