Microchip Technology SA50-28 non-hybrid, space-grade power converters

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Microchip Technology’s SA50-28 family is an off-the-shelf, 28 V-input, radiation-tolerant power converter offering that is based on discrete components with surface-mount construction and non-hybrid assembly processes. Designed to deliver more capabilities than alternative off-the-shelf, space-grade power converters, a single SA50-28 device with customised parameters eliminates the volume, weight and complexity problems of using hybrid solutions with their multiple devices and surrounding circuitry.

The comprehensive product line is a 20 to 40 V-input, 50 W family with nine standard outputs of 3.3, 5, 12, 15 and 28 V in single- and triple-output configurations. The devices can be tailored to a system’s exacting power needs in a relatively short time with minimal additional costs as compared to hybrid-style power converter products, the company says. Other features include high efficiency, low output noise, output inhibit control, overcurrent protection, external synchronisation and full-rated power operation through -55 to +85°C with linear derating to +125°C.

The SA50-28 family is part of Microchip’s growing line of standard non-hybrid, space-grade power converters that enable designers to use commercially available, off-the-shelf components whose circuitry has a proven spaceflight heritage. The products join the radiation-hardened SA50-120 power converter family, introduced in February 2021, designed to reduce risk and development time for qualified space systems by allowing designers to start with commercially available off-the-shelf technology in ceramic or plastic packages and quickly scale up development using lower screening levels than traditional qualified manufacturing list (QML) requirements.

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