Current limiter

摘要

A current limiter for Class-D amplifiers measures and stores a position of an over-current event. By comparing the stored position, output signals can be selectively inverted. As a result, the Class-D amplifier remains in a defined modulation scheme even during period of current limiting.

主权项

1. A current limiter for a class D amplifier, the current limiter comprising:
an over-current protection (OCP) block coupled to both a first side and a second side of the class D amplifier, wherein the OCP block further comprises: a plurality of over-current detecting (OCD) inputs; a plurality of OCP count blocks coupled to the plurality of OCD inputs; an OCP minimum position block coupled to the plurality of OCP count blocks; and a plurality of comparators coupled to the OCP minimum position block and configured to receive a plurality of running event position signals.