Space-grade planar transformers offer smaller size and higher density than traditional devices

Vishay Intertechnology, Inc. has introduced a new series of low-profile, space-grade planar transformers for power conversion applications. Offering a lower cost, smaller size, and higher density than conventional planar transformers, customisable Vishay Custom Magnetics SGTPL-2516 series devices fulfil the requirements of MIL-STD-981 class S.

The devices, offered with through-hole terminations and multiple package sizes, will be employed in SMPS, DC-DC, and AC/DC converters. Designed for the harshest of environments, the transformers combine their MIL-STD-981 qualification with a rugged package featuring moulded windings and high-temperature operation to +130C. SGTPL-2516 series devices operate over a frequency range from 80kHz to 300kHz and provide high dielectric withstand voltage to 1500VAC, power of 150W, and leakage inductance of 0.5µH.

Providing a unique winding structure and build technique, the transformers supply a greater copper fill factor than can be accomplished with conventional planar devices, resulting in a smaller package size and improved efficiency and power density. The series' winding technology permits for easy modification to fulfil design-specific needs for operating voltage, inductance, power, and package size and height with no up-front tooling charges. As well as S level MIL-STD-981 A and B group screening, the devices are available with P level screening for design validation testing and other custom screening options.