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

Claim 16:
17. The switching power supply system according to claim 16, wherein the anti-accidental turn-on circuit comprises a first transmission gate circuit, a second transmission gate circuit, and a first-stage sub-circuit,
wherein the first transmission gate circuit has an input terminal grounded, an output terminal coupled to a second input terminal of the first-stage sub-circuit and an output terminal of the second transmission gate circuit, a first control terminal coupled to a second control terminal of the second transmission gate circuit, and a second control terminal coupled to a first control terminal of the second transmission gate circuit;
the second transmission gate circuit has an input terminal provided with a first reference voltage, and an output terminal coupled to the second input terminal of the first stage sub-circuit, wherein a first control signal of the first control terminal of the first transmission gate circuit and a second control signal of the second control terminal of the first transmission gate circuit are determined based on the first reference voltage and the sampling voltage; and
the first-stage sub-circuit has a first input terminal coupled to the first input terminal of the anti-accidental turn-on circuit, and an output terminal coupled with the output terminal of the anti-accidental turn-on circuit.