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

Claim 5:
6. The synchronous rectification control circuit according to claim 5, wherein the second-stage sub-circuit comprises a second comparator, a second inverter, a second NMOS transistor, a second current source, a second capacitor, a fifth comparator and a second D flip-flop,
wherein the second comparator has a first input terminal which is the first input terminal of the second-stage sub-circuit, and a second input terminal which is the second input terminal of the second-stage sub-circuit;
the second inverter has an input terminal coupled to an output terminal of the second comparator;
the second NMOS transistor has a gate coupled to an output terminal of the second inverter, a drain coupled to a second terminal of the second current source, a second input terminal of the fifth comparator, and a first terminal of the second capacitor, and a source grounded;
the second current source has a first terminal provided with a preset power supply voltage;
the second capacitor has a second terminal grounded;
the fifth comparator has a first input terminal provided with a third reference voltage; and
the second D flip-flop has a clock signal input terminal coupled to an output terminal of the fifth comparator, a D terminal provided with a preset signal, and a Q terminal coupled to the output terminal of the second stage sub-circuit.