A low-power standby control circuit, high-power switching power supply and electrical equipment

Abstract

The present invention is applicable to the field of power and provides a low power consumption standby control circuit, a large power switching power supply, and electrical equipment. The circuit is connected to an auxiliary power supply and a PWM chip. The circuit comprises a standby control unit which generates a starting signal or shutdown signal according to a user standby instruction, a rapid starting unit which starts the PWM chip rapidly according to the starting signal and prevents the surge current from impacting the standby control unit, a shutdown unit which shut down the PWM chip according to the shutdown signal to realize low power consumption standby. According to the low power consumption standby control circuit, the large power switching power supply, and the electrical equipment, through controlling the shutdown unit to shut the output of a PWM signal in standby, the output of a main power circuit is shut, the standby control of low power consumption is realized so as to satisfy the requirement of novel energy standard proposed by the international community at present, the rapid starting unit is used as the starting circuit of the PWM chip and an anti-surge protection circuit, the rapid starting of the PWM chip can be realized, the impact to the circuit by the surge current is reduced, and the reliability of the power supply is improved.

Description

technical field [0001] The invention belongs to the field of power supplies, and in particular relates to a low-power consumption standby control circuit, a high-power switching power supply and high-power electrical equipment. Background technique [0002] Switching power supplies are used in some inductive loads, such as electric motors, lifting beds, massage machines, etc. The characteristics of such products: short working time, long standby state without load. According to the low-carbon life required by the whole world, especially the European and American markets are constantly improving energy efficiency standards, the requirements for the standby power consumption of such power supply products are getting higher and higher. According to the EUP directive, since 2010, the standby power consumption of switching power supply with output power ≤49W must be less than 0.3W. By 2016, the specific value will be further reduced, the adapter with output power ≤49W will be re...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a low-power standby control circuit, aiming to solve the problems that the traditional standby circuit cannot meet the standards of the new international energy efficiency plan, and the problems of slow power-on startup and poor reliability

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