Control circuit, charging circuit and electronic equipment

Abstract

The invention relates to a control circuit, a charging circuit and electronic equipment. The control circuit comprises a controller circuit, a voltage driving circuit and a voltage control circuit, wherein the driving end of the controller circuit controls the output of a driving signal; when the voltage driving circuit and the voltage control circuit receive the driving signal, the voltage driving circuit adjusts a first power supply voltage into a driving voltage according to the driving signal, and the voltage control circuit controls a switching circuit to be switched on according to the driving voltage; and when the voltage driving circuit and the voltage control circuit do not receive the driving signal, the voltage driving circuit outputs a first power supply voltage, and the voltage control circuit controls the switching circuit to be switched off according to the first power supply voltage. Therefore, as one port of the controller circuit is matched with the voltage driving circuit and the voltage control circuit, the on state and the off state of the switching circuit are controlled, so port resources of the controller circuit can be effectively saved and cost is reduced.

Description

technical field [0001] The present application relates to the technical field, in particular to a control circuit, a charging circuit and electronic equipment. Background technique [0002] Switch tubes are widely used in charging systems for switching charging, state switching and safety protection. The switching tube may be an NMOS (N-Metal-Oxide-Semiconductor, N-type Metal-Oxide-Semiconductor) switching tube. In order to ensure the normal operation of the charging system, the controller needs to use two I / O (Input / Output, input / output) ports to complete the on and off states of the NMOS switch tube. For example, when the switch tube needs to be turned off, except One of the I / O ports stops outputting signals, and another I / O port is required to pull down the gate voltage of the NMOS switch to avoid device burnout due to incomplete shutdown of the NMOS switch. [0003] However, the I / O port resources of the controller are very precious. Usually, multiple I / O ports are re...

AI Technical Summary

Problems solved by technology

[0003] However, the I / O port resources of the controller are very precious. Usually, multiple I / O ports are required to cooperate in order to complete other complex functions in the circuit. If two I / O ports are used to control the on and off of the path, it may be It affects the design of other functional modules of the system, thereby increasing the system design cost

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