Patent ID: 9420656
Filing Date: 2016-08-16
CPC Classification: H05B

Claim Text:
1. A light emitting diode dimmer circuit, comprising: a triode for alternating current (TRIAC) dimmer comprising a TRIAC; a rectifier and filter circuit, which comprises a full bridge rectifier and a first filter capacitor, and is electrically connected to a voltage output end of the TRIAC dimmer; an energy storage and rectifier circuit, which comprises a first inductor and a first diode, and is electrically connected to an output terminal of the rectifier and filter circuit; a buck converter circuit, which comprises a half bridge buck integrated circuit, and has a high-voltage side power supply source electrically connected to an output terminal of the energy storage and rectifier circuit; a light emitting diode circuit, which comprises a light emitting diode group, and has an input terminal electrically connected to an output terminal of a second inductor of the half bridge buck integrated circuit of the buck converter circuit; and a buck filter circuit comprising an first resistor, a second resistor, a second diode, a first regulator diode and a second capacitor, wherein an input terminal of the buck filter circuit is electrically connected to the output terminal of the second inductor of the buck converter circuit, an output terminal of the buck filter circuit is electrically connected to a power supply end of the half bridge buck integrated circuit of the buck converter circuit.