Patent ID: 9668311
Date: 2017-05-30
CPC Classifications: H05B

Claim:
1. An integrated circuit, suitable for an LED lamp comprising a power bank and LED groups, wherein the power bank is coupled between a rectified input voltage and a ground voltage, the power bank comprising a capacitor storing electric energy and a discharge switch coupled between the capacitor and the rectified input voltage, and the LED groups are arranged in series between the rectified input voltage and the ground voltage, the integrated circuit comprising: a path controller configured to control conduction paths, each conduction path coupling a corresponding LED group to the ground voltage; and a bank controller, configured to turn on the discharge switch in response to a first path signal corresponding to a first conduction path, and to turn off the discharge switch in response to a second path signal corresponding to a second conduction path; wherein the first and second path signals are different from each other.