CPC H02M 1/32 (2013.01) [H02H 1/0007 (2013.01); H02M 1/36 (2013.01); H02M 3/156 (2013.01); H02M 1/08 (2013.01)] | 10 Claims |
1. An overvoltage protection circuit configured to prevent an overvoltage of an output voltage of a switching converter, the overvoltage protection circuit comprising:
a) an output voltage simulation circuit configured to generate an output voltage simulation signal according to circuit parameters of said switching converter, wherein said output voltage simulation signal changes along with and represents said output voltage without being generated using said output voltage; and
b) an overvoltage signal generator configured to activate an overvoltage signal when a feedback voltage is less than a first threshold value and said output voltage simulation signal is greater than a second threshold value, wherein said feedback voltage is generated by sampling said output voltage.
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