Motor driver using spread spectrum mechanism for reducing electromagnetic interference

Abstract

A motor driver using a spread spectrum mechanism for reducing electromagnetic interference is provided. The motor driver generates a plurality of waveforms in each of a plurality of on-time signals, and modulates frequencies of at least some of the plurality of waveforms in each of the plurality of on-time signals to be different from each other. The motor driver drives the motor according to the modulated plurality of on-time signals. As a result, electromagnetic wave energy emitted by the motor driver of the present disclosure is changed or dispersed such that the electromagnetic wave energy is not overly concentrated at a same frequency. Therefore, the motor driver of the present disclosure is prevented from emitting the accumulated and amplified electromagnetic wave energy to cause electromagnetic interference to the operations of other circuit components.

Dependencies are inferred from the claim text.