Intelligent control circuit and intelligent control method of switch power supply efficiency

Abstract

The invention relates to an intelligent control circuit and an intelligent control method of switch power supply efficiency. The control circuit comprises a switch power supply circuit with a pulse width modulation (PWM) controller, an efficiency control circuit and an audio signal. The efficiency control circuit comprises a control voltage end V0, a power supply circuit for charging the control voltage end V0, a reset circuit for discharging voltage of the control voltage end V0 and a control circuit for controlling the PWM controller to work. The control circuit and the reset circuit are both connected with the audio signal. The control method includes controlling the switch power supply circuit to be in a standby state, an awaken state and a normal working state. The intelligent control circuit and the intelligent control method of the switch power supply efficiency do not need to improve the switch power supply circuit, save improvement cost, are strong in generality, adopt the audio signal to control the working state of a switch power supply, reduce standby power consumption of the switch power supply circuit, and adopt the efficiency control circuit of a pure electronic component so as to further reduce standby power consumption of the circuits.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a switching power supply energy efficiency intelligent control circuit and method. Background technique [0002] The implementation of energy efficiency standards (such as ErP) puts forward new requirements for the design of switching power supplies. ErP requires that the switching power supply can automatically enter the standby state after a certain period of time without discharging the electrical equipment, and requires that the power consumption at this time is less than a certain standard (such as 0.5W). In order to meet this requirement, the most common method is to use a switching power supply circuit that meets the green standard. The so-called green standard switching power supply circuit generally has the following characteristics: 1. High efficiency and low standby power consumption; 2. Using high conversion efficiency PFC (power factor correction) circuit to reduce energy...

AI Technical Summary

Problems solved by technology

And the general way to reduce standby power consumption is to add a processor to the original switching power supply circuit, and the processor detects the situation of the electrical equipment in real time. The structure is complex, and the electrical equipment is connected but not working, and the processor may also It will control the operation of the switching power supply circuit, and the processor is always in the working state. It needs to consume a certain amount of electric energy, and its price is higher than that of ordinary electronic components, and its heat dissipation performance is poor. At the same time, it needs to compile the control program, which prolongs the development cycle.

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