Reverse recovery current assisted body-controlled switch

Details Reverse recovery current assisted body-controlled switch Reverse recovery current assisted body-controlled switch

2011-03-01

2011-03-01

Behm, Harry (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

C323S222000

Reexamination Certificate

active

07898228

ABSTRACT:
A synchronous switch uses body-control switches to control the polarity of the parasitic device, which can be used to reduce power consumption by the parasitic device in accordance with various operating conditions. A charge-supplying device (such as a capacitor) is coupled in series between the bulk node (of the synchronous switch) and a power node (such as Vout or ground). The charge-supplying device provides power to the bulk node of the switch during reverse recovery of the parasitic device to minimize recombination time. Minimizing recombination time allows the polarity of the parasitic device to be switched more quickly (especially under low operating voltage and/or heavy load conditions), which converses more power.

REFERENCES:
patent: 5180964 (1993-01-01), Ewing
patent: 5410467 (1995-04-01), Smith et al.
patent: 5929615 (1999-07-01), D'Angelo et al.
patent: 6434019 (2002-08-01), Baudelot et al.
patent: 6483724 (2002-11-01), Blair et al.
patent: 7148668 (2006-12-01), Collins

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