Patent ID: 8823280
Filing Date: 2014-09-02
Classification: H05B,Y02B

Abstract:
1. An LED driving circuit comprises: a converting circuit, adapted to perform a power conversion to convert an input power source into a driving voltage for lighting an LED module; a current regulator, coupled to the LED module to regulate a current flowing through the LED module, wherein the current regulator conducts and stops conducting the current flowing through the LED module according to a dimming signal, and executes a protection process when the LED module operates abnormally; a converting controller, controlling the power conversion of the converting circuit according to a voltage level of at least one connection node of the current regulator and the LED module; and a low dimming protection blocking circuit, coupled to the current regulator and the converting circuit, wherein the low dimming protection blocking circuit blocks the protection process of the current regulator when the driving voltage is lower than a predetermined voltage value.