MOSFET gate drive with reduced power loss

Details MOSFET gate drive with reduced power loss MOSFET gate drive with reduced power loss

2007-08-08

2010-10-12

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S108000

Reexamination Certificate

active

07812647

ABSTRACT:
A gate driver for a power MOSFET in, for example, a DC-DC converter switches the MOSFET between a fully-on condition and a low-current condition instead of switching the MOSFET between fully-on and fully-off conditions. The amount of charge that must be transferred to charge and discharge the gate of the MOSFET is thereby reduced, and the efficiency of the MOSFET is improved. A feedback circuit may be used to assure that the magnitude of current in the power MOSFET in its low-current condition is correct. Alternatively, a trimming process may be used to correct the magnitude of the voltage supplied by the gate driver to the gate of the power MOSFET in the low-current condition.

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