Surge stopper switches in over-load to reduce heat

Using series regulation to operate through voltage surges is a well known technique, with the regulator fully-on during normal operation to minimise losses in the supply. For infrequent surges a linear surge protection regulator is fine, but in the face of frequent surges dissipation from a linear regulator could become an issue. For situations where ...

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from Electronics Weekly https://www.electronicsweekly.com/news/products/power-supplies/surge-stopper-switches-load-reduce-heat-2018-08/