Design of novel bootstrap driver used in high power BUCK converter

Author

Zhou, Zekun ; Ming, Xing ; Zhang, Bo ; Li, Zhaoji

Author_Institution

Sch. of Electron. & Inf. Eng., Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2009

fDate

20-23 Oct. 2009

Firstpage

1165

Lastpage

1168

Abstract

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 0.6-Â¿m BCD process based on a monolithic voltage-mode BUCK converter capable of driving up to 3 A loads with supply voltage from 8 to 30 V. Simulation results demonstrate that the power efficiency is over 84% for load current from 1 A to 3 A, and the buck converter can operate properly under all the application conditions.

Keywords

bootstrap circuits; driver circuits; power MOSFET; power convertors; N type power MOSFET; P type power MOSFET; UMC BCD process; bootstrap driver design; current 1 A to 3 A; high power buck converter; level shift circuit; monolithic voltage-mode buck converter; size 0.6 mum; voltage 8 V to 30 V; Buck converters; bootstrap driver; constant current source; high power BUCK converter; protection;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Conference_Location

Changsha, Hunan

Print_ISBN

978-1-4244-3868-6

Electronic_ISBN

978-1-4244-3870-9

Type

conf

DOI

10.1109/ASICON.2009.5351169

Filename

5351169