Patent ID: 11929684
Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 14:
15. The control circuit of claim 13, wherein the secondary-side control signal generator comprises:
a second comparator comprising a first input, a second input and an output, the first input receiving the signal characterizing the voltage of the secondary-side winding, the second input receiving the third reference;
a second flip-flop comprising a set terminal, a reset terminal and an output, the set terminal connected to the output of the second comparator; and
a secondary-side control timer comprising a timer starter terminal and a timing result output terminal, wherein the timer starter terminal starts a timer as soon as the secondary-side synchronous rectification transistor is turned on, and a timing result is output from the timing result output terminal to the reset terminal of the second flip-flop upon the elapse of the first predetermined period of time, wherein an output signal from the timing result output terminal of the secondary-side control timer serves as the secondary-side transistor switch control signal and is a single pulse signal.