Title :
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
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;
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
DOI :
10.1109/ISCAS.2008.4541889
