LEAKAGE PROTECTION CIRCUIT FOR DOUBLE-ENDED POWER LED LAMP TUBE

摘要

A leakage protection circuit for a double-ended power LED lamp tube, comprising a rectification circuit (20) and a main circuit (30), wherein the main circuit (30) comprises a voltage detection circuit (330), a current detection circuit (310) and a logic control module (320); the voltage detection circuit (330) detects a voltage of the main circuit (30); the logic control module (320) compares the magnitude of the voltage of the main circuit (30) and that of a pre-set voltage, and enables an output of the main circuit (30) when the voltage of the main circuit (30) is greater than the pre-set voltage; then, the current detection circuit (310) detects a current of the main circuit (30); and the logic control module (320) compares the magnitude of the current of the main circuit (30) and that of a pre-set current, and disables the output of the main circuit (30) when the current of the main circuit (30) is less than the pre-set current, thereby effectively avoiding the risk of electric shocks, and improving the usage security of a double-ended power LED lamp tube.