Title :
A PWM Controller IC for LED Driver Used to Multiple DC-DC Topologies
Author :
Lu Jiaying ; Wu Xiaobo
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou
Abstract :
A pulse width modulation (PWM) controller chip for LED driver was presented in this paper. The controller features two major operation modes, current feedback mode and constant current mode, so as to applicable to almost all DC-DC converter topologies such like buck, boost, buck-boost, flyback and SEPIC. A special error amplifier, which is composed of two sub-modules and a mode selector, was introduced to this chip to different applications. The peak current mode control with slope compensation was proposed to its control strategy. The controller integrated circuit (IC) was designed, simulated and fabricated in 1.5 mum BCD process. And both the simulation and test results were consistent with expectations well.
Keywords :
BIMOS integrated circuits; DC-DC power convertors; LED lamps; PWM power convertors; driver circuits; power integrated circuits; BCD integrated circuit; LED driver; PWM controller integrated circuit; buck-boost DC-DC converter; constant current mode; current feedback mode; flyback DC-DC converter; pulse width modulation; size 1.5 mum; slope compensation; Circuit simulation; Circuit topology; DC-DC power converters; Driver circuits; Feedback; Integrated circuit modeling; Light emitting diodes; Pulse amplifiers; Pulse width modulation; Space vector pulse width modulation;
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
DOI :
10.1109/APPEEC.2009.4918111
