Boost mechanism using driver current adjustment for...

Details Boost mechanism using driver current adjustment for... Boost mechanism using driver current adjustment for...

2011-03-01

2011-03-01

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C326S082000, C326S083000

Reexamination Certificate

active

07898303

ABSTRACT:
System and method for providing a boost current to a switching transistor gate is disclosed. A boost capacitor precharged to a voltage level above a gate-source voltage is coupled to a switching transistor gate at the beginning of a switch-on phase. The boost capacitor is decoupled from the switching transistor gate when a boost capacitor voltage falls below the gate-source voltage and is again precharged to the voltage level above the gate-source voltage. A second-phase resistance is coupled between a supply voltage and the switching transistor gate. The second-phase resistance value is selected based upon a current peak detected in the switching transistor. A switch-off capacitor precharged to a voltage level below the gate-source voltage may be coupled to the switching transistor gate at the beginning of a switch-of phase.

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patent: 7639050 (2009-12-01), Chigira
patent: 7671660 (2010-03-01), Van Acht et al.

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