This overvoltage protection or crowbar protection circuit is used where we need protection against high voltage surge. The circuit has a few components, it is very easy to build and will protect your ...

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For power-supply controllers with an external soft-start pin, however, a simple circuit can be added to convert its non-latching fault protection into one with latched protection.

While basically a Schmitt trigger, the circuit topology is unusual in that it features two independently settable thresholds for positive or negative signals.