An efficient power-off energy storage protection circuit

Abstract

The invention provides an efficient power-off energy storage protection circuit. When the power supply is powered up, The circuit supplies voltage to the output port through the buck charging circuit.and charge the high voltage capacitor, When the detection circuit detects that the voltage at the charging terminal of the capacitor reaches the maximum output voltage of the step-down charging circuit module, the detection circuit turns off the buck charging module path, and continues to charge the high-voltage capacitor C2 after boosting the charging voltage until the voltage of the charging terminal of the high-voltage capacitor C2 reaches the maximum output voltage of the booster charging circuit module; When the detection circuit module detects that the input terminal is powered off, thesignal indication circuit sends out the power-off signal indication to the outside of the circuit through the VPG port, and the high-voltage capacitor C2 supplies the working voltage to the input terminal through the discharge circuit module, so that the whole circuit enters into the state of power-off and energy storage protection. The design of the circuit of the invention becomes simpler, thecapacitance volume is reduced, and the cost can be saved.

Description

technical field [0001] The invention relates to the technical field of power supply control, in particular to an energy storage protection circuit. Background technique [0002] With the development of science and technology, all walks of life are inseparable from real-time network communication transmission equipment, such as routers, network receivers and so on. Once the internal circuit of the device suddenly loses power, if there is no power-off energy storage protection circuit in the device to provide it with a short continuous working time, and it cannot provide a signal of device power-off to the external circuit in time, so the power-off emergency cannot be carried out in time Processing, such as emergency measures such as power-off reset, information processing and storage, will cause a certain loss of information running on the device, resulting in some unnecessary losses. [0003] At present, to deal with such emergencies, large capacitors are mainly used as the...

AI Technical Summary

Problems solved by technology

At present, most circuits adopt the method of increasing the volume of capacitors or increasing the number of capacitors, and at the same time increase the overall volume of such circuit equipment, resulting in increased design costs.

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