Zero Current Low Voltage Cut Off and Latching Power Switch

This is a little circuit I have been playing around with for Lipo battery protection. It will cut off the power from the battery at 3v with zero current load when off. It takes advantage of Dave Jones’ ‘World’s Simplest Soft Latching Power Switch Circuit’ (EEVblog #262 ) –

As far as I am aware, I could definitely be wrong, it consume zero current while off. Feel free to correct me.

Check out his video for a detailed explanation part of the circuit. I added a TC54 voltage detector to create cut off functionality so that I can be sure that the circuit will switch off a 3v and I don’t have to worry about the battery recovering once the load has disconnected.

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