Design of Novel Bootstrap Driver Used in High Power BUCK Converter
A novel bootstrap driver suitable for high power buck converter is presented in this paper.With the help of bootstrap driver,the P type power MOSFET used in conventional BUCK converter can be replaced by N type power MOSFET in order to optimize efficiency and area. The proposed bootstrap driver,abandoning conventional level shift circuit,can work properly in a wide power supply range with sufficient protection. The bootstrap driver has been validated with UMC 0.6μm BCD process based on a monolithic voltage-mode BUCK converter capable of driving up to 3A loads with supply voltage from 8 to 30V.Simulation results demonstrate that the power efficiency is over 84% for load current from 1A to 3A,and the BUCK converter can operate properly under all the application conditions.
bootstrap driver constant current source protection high power BUCK converter
Zekun Zhou Xing Ming Bo Zhang Zhaoji Li
University of Electronic Science and Technology of China,Chengdu,China
国际会议
2009 IEEE 8th International Conference on ASIC(第八届IEEE国际专用集成电路大会)
长沙
英文
1165-1168
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）