Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Zero-Transient Current Control Method for PWM Dimming of LED
Authors Young-Nam Yoon ; 李Sang-Hyun Lee ; Sang-Ho Cho ; Sung-Soo Hong ; Chang-Sub Kim ; 李Hyo-Bum Lee ; Sang-Kyoo Han
DOI 10.6113/TKPE/2011.16.1.64
Page pp.64-70
ISSN 1229-2214
Keywords LED current control; zero-transient; PWM dimming
Abstract This paper presents a zero-transient current control method for PWM dimming of LED. Since the proposed LED current control method has no transient state, it features a high resolution, high linearity, and no current overshoot through LED along a wide dimming range. The operational principles of the proposed LED current control circuit are presented. To confirm the validity of the proposed method experimental results from a prototype circuit of the 46-inch LCD TV are given.