Bridgeless rectifier circuit, leakage current peak control method and readable storage medium

Abstract

A bridgeless rectification circuit, a leakage current peak control method, and a readable storage medium, wherein the bridgeless rectification circuit includes a common-mode filter circuit and a capacitor circuit. The common-mode filter circuit is used to suppress the common-mode interference signal in the AC signal. The capacitor circuit is used to control and reduce the voltage change rate of the common-mode filter circuit when the AC signal crosses zero. The common mode filter circuit includes: a first Y capacitor connected to the protection ground, and the equivalent capacitance of the capacitor circuit is greater than the capacitance of the first Y capacitor. In the bridgeless rectifier circuit mentioned above, by adding a capacitor circuit, the voltage change rate of the common-mode filter circuit is reduced when the AC signal crosses the zero point, thereby correspondingly reducing the peak value of the leakage current of the first Y capacitor, which has high safety , to avoid the peak value of the leakage current of electronic products exceeding the standard and not complying with the IEC62368 international product safety standard.

Description

technical field [0001] The application belongs to the technical field of switching power supplies, and in particular relates to a bridgeless rectification circuit, a bridgeless rectification circuit, a leakage current peak control method and a readable storage medium. Background technique [0002] The traditional bridgeless rectifier circuit (see Figure 1(a) for details) has an inherent characteristic, that is, when the AC (Alternating Current, alternating current) input is at the zero crossing point, the polarity of the input current is reversed, making N-PGND and PE-PGND Both generate a sudden change voltage Vbulk, and the magnitude of the sudden change voltage Vbulk is relatively large, so that the leakage current I through the common mode filter capacitor (hereinafter referred to as Y capacitor) CY1 PE The peak value is relatively large (see Figure 1(b) for details), which threatens the safety of the human body and the safety of electronic products; the current solution ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a bridgeless rectification circuit, a leakage current peak control method, and a readable storage medium, aiming to solve the problem in the traditional bridgeless rectification technical solution that the leakage of the Y capacitor CY1 is caused by the AC input at the moment of zero crossing. The peak value of the current is large, which threatens the safety of the human body and the safety of electronic products is low

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