New driving scheme for self driven synchronous rectifiers

Author

Cobos, J.A. ; Alou, P. ; García, O. ; Uceda, J. ; Rascón, M.

Author_Institution

Div. de Ingenieria Electron., Univ. Politecnica de Madrid, Spain

Volume

2

fYear

1999

fDate

14-18 Mar 1999

Firstpage

840

Abstract

Self-driven synchronous rectification (SDSR) is a very good technique to improve efficiency and thermal management in low output voltage converters. In this paper, a new scheme to drive the synchronous rectifiers (SRs) is proposed. It allows for maintaining the SRs on even when the voltage in the transformer is zero, which is impossible to do in traditional self-driven approaches. It also makes possible to drive properly the SRs even for applications where output voltage is lower than 3.3 V, namely 1.5 V. Furthermore, driving losses are very low, since the discharge of one MOSFET is used to charge the other and vice versa. This scheme has been validated in two prototypes

Keywords

MOSFET; driver circuits; rectification; rectifying circuits; thermal management (packaging); 1.5 V; MOSFET discharge; driving losses; driving scheme; efficiency improvement; low output voltage converters; self driven synchronous rectifiers; thermal management improvement; Analytical models; Low voltage; MOSFET circuits; Power supplies; Power transformers; Prototypes; Rectifiers; Semiconductor diodes; Thermal management; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual

Conference_Location

Dallas, TX

Print_ISBN

0-7803-5160-6

Type

conf

DOI

10.1109/APEC.1999.750466

Filename

750466