| CPC H02H 3/10 (2013.01) [H02H 1/0007 (2013.01); H02H 5/04 (2013.01)] | 15 Claims |
|
1. A circuit system, comprising:
a power circuit comprising a first switch transistor; and
an operation circuit, electrically connected to the power circuit and configured to control operation of the power circuit, detect a first signal of the power circuit during the operation, and protect the power circuit in response to the first signal;
wherein the operation circuit comprises:
a second switch transistor;
a gate driver, configured to drive the second switch transistor;
a detection circuit, configured to detect the first signal flowing through the first switch transistor, wherein the detection circuit comprises a current mirror circuit configured to generate a second signal in proportion to the first signal; and
an overcurrent protection circuit, configured to receive the second signal and generate a third signal to the gate driver according to the second signal to turn off the second switch transistor;
wherein the overcurrent protection circuit comprises:
a plurality of comparators, each non-inverting input terminal of the plurality of comparators is configured to receive the second signal; and
a logic gate, configured to generate a third signal according to outputs of the plurality of comparators.
|