Compact medium-power planar transformer boost efficiency

New from Vishay is a planar transformer series offering power from 1kW to 3kW in a compact 70mm by 53mm by 22mm size. Compared to devices built on traditional winding technology, the PLA51 delivers the same power transfer / conversion while offering higher efficiency and a lower weight and profile, says the company. The device is optimized for DC-DC power converters, on-board chargers for electric vehicles, UPS, power control cooling units, and solar inverters. In these applications, the PLA51's high typical efficiency of >99% typical reduces losses, while its low profile of 22mm saves space in subassemblies. In addition, the transformer's reduced weight of 170g is a key parameter for power supplies in avionics applications. Providing exceptional repeatability, the PLA51 features a frequency range of 50kHz to 400kHz and operates over a temperature range from -55C to +125C with heatsink dissipation. Offered in full-bridge, half-bridge, and forward power supply topologies, the transformer features tapped outputs for fast and easy connection. This RoHS-compliant device is also available in custom designs on request, says the company.