Patent ID: 11870362
Assignee: WUXI CHIPOWN MICROELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. The synchronous rectification control circuit according to claim 7, wherein the third-stage sub-circuit comprises a third comparator, a third inverter, a third NMOS transistor, a third current source, a third capacitor, a sixth comparator and a third D flip-flop,
wherein the third comparator has a first input terminal which is the first input terminal of the third-stage sub-circuit, and a second input terminal which is the second input terminal of the third-stage sub-circuit;
the third inverter has an input terminal coupled to an output terminal of the third comparator;
the third NMOS transistor has a gate coupled to the output terminal of the third inverter, a drain coupled to a second terminal of the third current source, a second input terminal of the sixth comparator, and a first terminal of the third capacitor, and a source grounded;
the third current source has a first terminal provided with a preset power supply voltage;
the third capacitor has a second terminal grounded;
the sixth comparator has a first input terminal provided with a fourth reference voltage; and
the third D flip-flop has a clock signal input terminal coupled to an output terminal of the sixth comparator, a D terminal provided with a preset signal, and a Q terminal coupled to the output terminal of the third-stage sub-circuit.