Output load adaptable MOSFET gate drive voltage level in a...

Details Output load adaptable MOSFET gate drive voltage level in a... Output load adaptable MOSFET gate drive voltage level in a...

2008-05-13

2008-05-13

Laxton, Gary L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000

Reexamination Certificate

active

07372240

ABSTRACT:
The output current of a fixed-frequency DC to DC converter is sensed, creating a voltage representative of the load current. This voltage is then compared to one or more threshold voltages using a plurality of comparators, creating a plurality of logic signals indicative of which of a plurality of ranges the output current falls within. These logic signals are coupled to a multiplexer which decodes the logical inputs to one-of-n and selects one gate drive voltage from a plurality of such voltages, each optimized for its corresponding current range. The selected gate drive voltage is then used as the gate drive in a known art DC to DC converter, thereby increasing efficiency over a wide range of output current.

REFERENCES:
patent: 6166527 (2000-12-01), Dwelley et al.

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