Reduction of voltage spikes in switching half-bridge stages

Details Reduction of voltage spikes in switching half-bridge stages Reduction of voltage spikes in switching half-bridge stages

2006-09-06

2008-11-11

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S307000, C330S20700P

Reexamination Certificate

active

07449947

ABSTRACT:
A path configuration for a power switch and driver can introduce independent parasitic inductance coupled to the power switch to slow a switching speed of the switch and reduce voltage spikes on the switch during switching events. The path for low side supply of the drive to the negative DC voltage reference is separate from the path of the power switch to the reference. The resulting reduction in voltage spikes due to the slowed switching time maintains performance in an audio amplifier without modifying a switch command signal to compensate for voltage spikes. The path configuration avoids reliance on specifying higher rated components that increase application costs.

REFERENCES:
patent: 5973368 (1999-10-01), Pearce et al.
patent: 6424208 (2002-07-01), Pinai
patent: 6603291 (2003-08-01), Wheeler et al.
patent: 2007/0171591 (2007-07-01), Kaya et al.

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