Patent ID: 8174201
Filing Date: 2012-05-08
Classification: H05B,Y02B

Abstract:
1. An electronic ballast comprising: a rectifier circuit having a pair of input terminals for receiving an ac input voltage and a pair of output terminals for outputting a dc voltage, wherein a first output terminal of the rectifier circuit is for coupling with a second node of a lamp; a first inductor having a second end for coupling with a first node of the lamp; a second inductor having a first end coupled with a fifth node and a second end for coupling with a fourth node of the lamp; a first capacitor having a first end coupled with the fifth node and a second end for coupling with the second node; a second capacitor having a first end coupled with a sixth node; a first resistor having a first end coupled with the sixth node; a second resistor coupled with a second output terminal of the rectifier circuit; a third capacitor and a third resistor coupled in series between the sixth node and the second output terminal of the rectifier circuit; a power switch having an output end, a ground end and a control end, wherein the output end is coupled with the fifth node and the ground end is coupled with the second resistor; and a third inductor coupled between the sixth node and the control end of the power switch.