Patent ID: 9699840
Date: 2017-07-04
CPC Classifications: H05B,Y02B

Claim:
1. A light-emitting diode (LED) driver, comprising: a) a reference voltage control circuit configured to provide a reference voltage signal in response to an enable signal, wherein said reference voltage signal equals a first voltage value when said enable signal is active, and equals a second voltage value when said enable signal is inactive, wherein said first voltage value is configured to represent an expected output current of said LED driver; b) a current control circuit configured to generate a control signal to control an output current of said LED driver in response to said reference voltage signal and a feedback signal that represents an output current of said LED driver; and c) a power switch controllable by said enable signal and said control signal, wherein said power switch is controlled by said control signal to drive an LED load when said enable signal is active, and said power switch is disabled when said enable signal is inactive.