DC-DC converter for mobile application

Details DC-DC converter for mobile application DC-DC converter for mobile application

1996-12-31

1998-07-07

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

G05F 156

Patent

active

057774617

ABSTRACT:
A DC-DC voltage conversion provides a voltage to a processor in a mobile computer system using a high side power FET and a low side power FET, each having a variable gate discharge time dependent on the applied battery voltage. The power FETs are arranged in a synchronous totem pole configuration with a junction point therebetween, coupled between a voltage input terminal and ground, with the junction point coupled to a voltage output terminal. Each of the power FETs is driven by a FET driver, with the driver being coupled to the output of a comparator comparing a reference voltage with the output voltage. To avoid cross-conduction, the high side power FET and the low side power FET are coupled to each other in such a manner that the event of one turning off will turn on the other after a dead time determined by the threshold sense circuit, plus delays of the devices used in the embodiment.

REFERENCES:
patent: 4001721 (1977-01-01), Fukuda
patent: 4009432 (1977-02-01), Dungwall
patent: 5386200 (1995-01-01), Limberg
patent: 5404096 (1995-04-01), Thiel
patent: 5534771 (1996-07-01), Massie

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