A novel driving scheme for synchronous rectifier suitable for modules in parallel

Author

Gu, Yilei ; Lu, Zhengyu ; Qian, Zhaoming ; Huang, Guisong

Author_Institution

Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China

Volume

20

Issue

6

fYear

2005

Firstpage

1287

Lastpage

1293

Abstract

In this paper, a short circuit phenomenon when dc-dc modules with self-driven synchronous rectifier (SR) run in parallel is described. Three existing driving schemes are analyzed and compared. A novel driving scheme for SR maintains the performance of SR as a self-driven scheme, while solving the problem of a short circuit when modules run in parallel. In addition, the amplitude of an SR driving voltage can be adjusted by using the proposed scheme. Therefore, the scheme is more attractive in the applications of comparatively high-voltage output. The principle of operation and the characteristics of the scheme are analyzed and verified on a 36-75V input 1.8-V/60-A output experimental prototype, whose size is 1/4 brick and efficiency is above 90% under rating conditions.

Keywords

DC-DC power convertors; driver circuits; rectifying circuits; short-circuit currents; 1.8 V; 36 to 75 V; 60 A; DC-DC module; self-driven scheme; short circuit phenomenon; synchronous rectifier; Electricity supply industry; Power electronics; Power supplies; Prototypes; Rectifiers; Strontium; Switched capacitor circuits; Switches; Switching circuits; Voltage; In parallel; self-driven scheme; synchronous rectifier (SR);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2005.857528

Filename

1528601