Reverse conduction protection method and apparatus for a...

Details Reverse conduction protection method and apparatus for a... Reverse conduction protection method and apparatus for a...

2007-08-07

2007-08-07

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

C307S051000, C307S071000, C307S080000, C307S085000

Reexamination Certificate

active

10706467

ABSTRACT:
The invention is a dual stage power supply with a protection circuit for preventing reverse conduction through the lower voltage driver of the dual stage power supply and excess power dissipation when the higher voltage driver is on. In one embodiment of the invention, the protection scheme comprises a comparator that detects when the voltage on the output pad exceeds a predetermined voltage and a protection transistor which is controlled by the comparator to block reverse conduction through the lower voltage driver when the higher voltage driver is operating.

REFERENCES:
patent: 2002/0167771 (2002-11-01), Kamiya
patent: 2004/0140719 (2004-07-01), Vulih et al.

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