LED drivers with PPD compensation for achieving fast transient response

Author

Hsieh, Chun Yu ; Wang, Shih Jung ; Lee, Yu Huei ; Chen, Ke Horng

Author_Institution

Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu

fYear

2008

fDate

18-21 May 2008

Firstpage

2202

Lastpage

2205

Abstract

A trade-off performance between static error and dynamic response is made by the combination of proportional (P) and proportional derivative (PD) compensations. Owing to the fast transient response provided by the P compensator, the static error is also reduced by the PD compensator within a reasonable response time. The proposed control circuit is entirely implemented by voltage mode and has better line and load regulations. An asynchronous 1.8MHz DC/DC boost converter was fabricated by UMC 0.35mum to generate 35V output voltage to turn on more than 10 LED at the same time for the notebook´s backlight.

Keywords

DC-DC power convertors; driver circuits; light emitting diodes; transient response; DC/DC boost converter; LED drivers; PPD compensation; dynamic response; frequency 1.8 MHz; proportional derivative compensation; size 0.35 mum; static error; transient response; voltage 35 V; Channel bank filters; DC-DC power converters; Delay; Driver circuits; Feedback; Inductors; Light emitting diodes; Pulse width modulation; Transient response; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-1683-7

Electronic_ISBN

978-1-4244-1684-4

Type

conf

DOI

10.1109/ISCAS.2008.4541889

Filename

4541889