US 2009/0257259 A1 · BRIDGE SYNCHRONOUS RECTIFIER

Abstract

A current-triggered synchro-rectifier comprising an electronic switch configured to be in its ON setting when the current flowing through its cathode exceeds a predetermined threshold. The electronic switch may include a half-wave rectifier wired to the source terminal and the drain terminal of a MOSFET device, and a current monitor configured to monitor the drain-current flowing through the drain terminal. The current monitor sends a gate signal to the gate terminal such that the MOSFET is switched to its ON state when the drain-current exceeds a first threshold current and the MOSFET is switched to its OFF state when the drain-current falls below a second threshold current. Usefully, the synchro-rectifier may be incorporated into a full-wave rectifier.

Claims20

Dependent claims

A current-triggered synchro-rectifier comprising an electronic switch having an anode and a cathode, said electronic switch configured to be in its ON setting when current flowing through said cathode exceeds a predetermined threshold.

A full-wave rectifier comprising

a first half-wave rectifier having one anode wired to a first output terminal and one cathode wired to a first input terminal;
a second half-wave rectifier having one anode wired to said first output terminal and one cathode wired to a second input terminal;
a third half-wave rectifier having one anode wired to said first input terminal and one cathode wired to a second output terminal;
and
a fourth half-wave rectifier having one anode wired to said second input terminal and one cathode wired to said second output terminal;
the full wave rectifier for providing an output of constant polarity from an input of variable polarity, wherein at least one half-wave rectifier comprises an electronic switch configured to be in its ON state when the current flowing through the cathode of said switch exceeds a predetermined threshold.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/423,530Filed 14 Apr 2009

Priority

15 Apr 2008

Published

15 Oct 2009

Term ends

Not estimatedThe source records don’t support an estimate.

Classification2 codes

H02M 7/217
Using devices of a triode or transistor type requiring continuous application of a control signal: using semiconductor devices only
H02M
Apparatus for conversion between ac and ac, between ac and dc, or

Bridge synchronous rectifier

Life of this patent

Bridge synchronous rectifier

Life of this patent

Abstract

Claims20