Synchronous rectifier with dead time adjusting function

Details Synchronous rectifier with dead time adjusting function Synchronous rectifier with dead time adjusting function

2005-11-01

2005-11-01

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C363S021060, C363S021140, C363S089000

Reexamination Certificate

active

06961256

ABSTRACT:
A synchronous rectifier with dead time adjusting function is used in fly-back power supplies for adjusting dead time of switches. The synchronous rectifier has a rectifying circuit connected to a secondary side terminal of a transformer and outputting a positive half-cycle voltage, a charging circuit connected to the rectifying circuit for producing a first charging voltage and a second charging voltage, a regulated power circuit connected to the charging circuit and producing a reference voltage, a trigger circuit connected to the rectifying circuit and the charging circuit for generating a dead time adjusting comparing signal, a comparing circuit connected to the regulated circuit, the charging circuit and the trigger circuit for producing a dead time adjusting signal, and a logic circuit connected to the comparing circuit and the rectifying circuit for outputting a driving signal for controlling on/off states of a first electric switch.

REFERENCES:
patent: 6191964 (2001-02-01), Boylan et al.
patent: 6577518 (2003-06-01), Abdoulin

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