Alternating current power-down response circuit and electric appliance equipment

Abstract

Embodiments of the invention disclose an alternating current power-down response circuit and electric appliance equipment. The alternating current power-down response circuit comprises a PFC control module, a large electrolytic module, an LLC control module, an LLC transformer, a power supply module and a power-down response module; the power-down response module is connected with the functional output end of the PFC control module and the LLC control module; the PFC control module is connected with an alternating current power supply; when a pulse signal, which passes through the functional output end of the PFC control module, of the power-down response module is changed and when power down of the alternating current power supply is determined, the LLC control module is controlled to stop working, the LLC transformer is further controlled to stop working, and a control power supply indicator lamp is turned off and does not work, so that the electric appliance equipment can stop working in time and the power down information can be accurately fed back to a user when the alternating current power supply connected with the electric appliance equipment suffers from power down.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electric variable detection, and in particular to an AC power failure response circuit and electrical equipment. Background technique [0002] At present, most home appliances on the market use AC-DC and DC-DC power supplies internally. When the AC power fails, the internal chips of the electrical equipment usually stop working immediately, and the peripheral indicator lights go out to reflect the power failure. , However, there are also some special power management mechanisms for electrical equipment, making it difficult to meet the above requirements. [0003] figure 1 Shown is a schematic structural diagram of a power management module used in an electrical device in the prior art. The power management module includes an AC interface, a rectification and filtering circuit, a large electrolytic capacitor, a control circuit, a transformer and an output rectification circuit. [0...

AI Technical Summary

Problems solved by technology

This gives the user the false impression that the AC power input by the electrical equipment has not yet been powered off, making it difficult for the user to judge whether the electrical equipment is turned off, and affecting the user's experience in using the electrical equipment

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