Capacitive high-side switch driver for a power converter

Details Capacitive high-side switch driver for a power converter Capacitive high-side switch driver for a power converter

2006-07-14

2011-12-13

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S108000, C327S109000, C327S110000, C327S111000, C326S082000, C326S083000, C326S085000, C326S087000, C326S088000

Reissue Patent

active

RE043015

ABSTRACT:
The present invention discloses a capacitive high-side switch driver for a power converter. The capacitive high-side switch driver according to the present invention includes an inverter and two alternately conducting totem-pole buffers with complementary duty cycles. The duty cycles alternate in response to an input signal. The capacitive high-side switch driver further includes a low-side transistor and a high-side transistor. Once the low-side transistor is turned on, a bootstrap capacitor is charged to create a floating voltage via a charge-pump diode to supply power for the high-side switch driver. To supply additional power for the high-side switch driver, differential signals are produced to further charge the bootstrap capacitor via a bridge rectifier. The capacitive high-side switch driver utilizes a programmable load to provide variable impedance. Furthermore, an under-voltage protector supervises the supply voltage to ensure a reliable gate driving voltage.

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patent: 6215328 (2001-04-01), Nasu
patent: 6344959 (2002-02-01), Milazzo
patent: 6781422 (2004-08-01), Yang

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