Charger with built-in electric leakage protection circuit and electric leakage protection method thereof

Abstract

The invention discloses a charger with a built-in electric leakage protection circuit and an electric leakage protection method thereof. The protection circuit comprises a charger body, a relay mechanism circuit, a relay mechanism test circuit, an electric leakage detection circuit, a voltage reduction circuit and an output control circuit, wherein the relay mechanism circuit, the relay mechanism test circuit, the electric leakage detection circuit, the voltage reduction circuit and the output control circuit are installed in the charger body. A power supply is connected to an input terminal of the electric leakage detection circuit through an overload protection circuit. The relay mechanism circuit and the relay mechanism test circuit are connected to the input terminal of the electric leakage detection circuit. The electric leakage detection circuit is connected to an input terminal of a rectification circuit through a first filter circuit. An output terminal of the rectification circuit is divided into two paths. One path of the output of the rectification circuit is connected to the voltage reduction circuit through a second filter circuit. Another path of the output of the rectification circuit is connected to the voltage reduction circuit through a PWM circuit. The voltage reduction circuit is connected to an input terminal of the output control circuit. An output terminal of the output control circuit outputs to electric equipment. When there is an electric leakage phenomenon, the charger can be powered off automatically so that damages to people caused by electric leakage are avoided.

Description

technical field [0001] The invention relates to the technical field of chargers, in particular to a charger with a built-in leakage protection circuit and a leakage protection method thereof. Background technique [0002] The chargers currently on the market are all ordinary chargers, which convert AC to DC. With the rapid development of mobile phones, metal shell mobile phones currently used in the market are becoming more and more popular, and there may be a risk of leakage when using ordinary chargers. If a leakage occurs during the use of the charger, the power cannot be automatically cut off, and the leakage will directly cause harm to the human body. Contents of the invention [0003] In view of the deficiencies in the above-mentioned technologies, the present invention provides a charger with a built-in leakage protection circuit and a leakage protection method thereof, which can automatically cut off the power in case of leakage in the charger, thereby avoiding da...

AI Technical Summary

Problems solved by technology

If there is a leakage during the use of the charger, the power cannot be automatically cut off, and the leakage will directly cause harm to the human body

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