Dual-input electric leakage protector chip

Abstract

The invention discloses a dual-input electric leakage protector chip, and relates to the field of electrical safety. The dual-input electric leakage protector chip comprises a power voltage stabilization circuit, a voltage reference circuit, an amplifier circuit and an output circuit, wherein the power voltage stabilization circuit is used for providing a working voltage, the voltage reference circuit is used for providing a reference voltage for the amplification circuit, a first output end of the amplifier circuit is electrically connected with a first input end of the output circuit, a second output end of the amplifier circuit is electrically connected with a second input end of the output circuit, an output end of the output circuit outputs a power-failure signal when a first electricleakage signal is received by the second input end of the amplification circuit, and the output end of the output circuit outputs he power-failure signal when a second electric leakage signal is received by the second input end of the amplification circuit. Compared with the prior art, the circuit structure of an existing dual-input electric leakage protector circuit is optimized.

Description

technical field [0001] The invention relates to the field of electric safety, in particular to a double-input leakage protector chip. Background technique [0002] With the improvement of living standards, there are more and more electrical appliances in people's homes, and more and more attention is paid to the safety of domestic electricity consumption. Various leakage protectors have appeared. The current ground wire anomaly protection can no longer meet the conventional control requirements, so the leakage protector needs to develop in the direction of intelligence, and the ground wire anomaly protection needs extended detection and intelligent identification to realize all-round three-dimensional protection. [0003] As disclosed in Chinese invention patent CN102723695A, a leakage monitor chip of a leakage protector includes a power supply voltage stabilizing circuit, a reference voltage generator and a latch output circuit, wherein the power supply voltage stabilizatio...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of living standards, there are more and more electrical appliances in people's homes, and more and more attention is paid to the safety of domestic electricity consumption. Various leakage protectors have appeared. The current ground wire abnormality protection can no longer meet the conventional control requirements, so the leakage protector needs to develop in an intelligent direction, and the ground wire abnormality protection needs extended detection and intelligent identification to realize all-round three-dimensional protection

[0003] As disclosed in Chinese invention patent CN102723695A, a leakage monitor chip of a leakage protector includes a power supply voltage stabilizing circuit, a reference voltage generator and a latch output circuit, wherein the power supply voltage stabilization circuit is provided for the reference voltage generator and the latch output circuit. Working voltage; the feature is that it also includes a first amplifier circuit and a second amplifier circuit with the same circuit structure and performance, an input terminal of the first differential amplifier circuit is electrically connected with an input terminal of the second differential amplifier circuit, and this terminal is used as a common input The terminal is connected to an external circuit; the other input terminal of the first differential amplifier circuit is connected to the external circuit, the other input terminal of the second differential amplifier circuit is connected to the external circuit, and the output terminal of the first amplifier circuit and the output terminal of the second amplifier circuit are respectively connected to the The input terminals of the latch output circuit are electrically connected; the reference voltage generator circuit provides reference voltages for the input terminals of the first differential amplifying circuit and the second differential amplifying circuit respectively, and the invention adopts two amplifying circuits in order to realize double input, and there is a circuit The problem of complex structure and poor anti-pulse ability

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