Power FET gate charge recovery

Details Power FET gate charge recovery Power FET gate charge recovery

2007-11-09

2010-06-29

Vu, Bao Q (Department: 2838)

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

C327S589000

Reexamination Certificate

active

07746153

ABSTRACT:
A circuit for recovering charge at the gate of an output transistor arranged to drive the output of a switching circuit such as a switching regulator or controller. A substantial portion of the charge for each switching cycle is recovered under a wide range of load conditions for the switching circuit, e.g., no load, partial load, or full load. Also, charge recovery operates effectively with a switching circuit that is arranged to switch in a synchronous or asynchronous manner. Additionally, if the output voltage of a switching circuit is 12 or more volts, the amount of charge that can be saved can be relatively substantial.

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Radoslava Mitova et al., “Fully Integrated Gate Drive Supply Around Power Switches,” IEEE Transactions on Power Electronics, May 2005, pp. 650-659, vol. 20, No. 3.

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