Control method and control circuit of on-state charging circuit, and on-state charging circuit

Abstract

The invention discloses a control method and a control circuit of an on-state charging circuit, and the on-state charging circuit. The on-state charging circuit comprises a first switch tube, a firstconduction element, a second switch tube and a third switch tube; a first input end is connected to the output end of the on-state charging circuit through a series circuit formed by the first conduction element and the first switch tube; the first input end is connected to a reference ground through the second switch tube; a second input end is connected to the reference ground through the thirdswitch tube; when a load circuit is switched on, the first switch tube is switched on; when a voltage of the output end of the charging circuit relative to the reference ground is lower than a first voltage threshold value, the output end of the charging circuit is in a charging state; when the voltage of the output end is increased to a second voltage threshold value, the output end of the charging circuit is in a non-charging state; when the voltage of the output end of the charging circuit is reduced to the first voltage threshold value, the output end of the charging circuit is in the charging state; and in the non-charging state, the second switch tube and the third switch tube are switched on.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a method for controlling an on-state charging circuit, a control circuit and an on-state charging circuit. Background technique [0002] The home appliance control switch panel will integrate various sensor devices to provide detection and control input interfaces for various devices or lighting fixtures. These sensor devices need to supply power to them, while there is only one live wire inside the traditional wall mechanical switch box. The wall switch power supply of the loop has become a bottleneck restricting the intelligent upgrade of traditional equipment. How to provide a stable and safe single live wire power supply solution has become a key technical difficulty. [0003] Please refer to figure 1 As shown, it is a single live wire power supply scheme. The switch K01 is a switch on the switch panel. The switch panel controls the on and off of the load circuit ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a control method, a control circuit and an on-state charging circuit for a single-fire wire on-state charging circuit, which are used to solve the problem of complex power supply systems caused by the use of relays in the prior art, and the periphery of the application system. Many components and high cost

Images