Over current protection self-Latching Re

In the power electronic device driver circuit, over-current protection as devices need to add a  , to prevent further damage power device. If the driver does not need to add IC function of self  . The self-locking most simple circuit can be used to realize the two triode tube, has been widely used.
The parameter C2 is the role of the maintenance of VT2 continue to guide,, to prevent misoperation, a button in the parallel R1 circuit can realize the manual reset.
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