Patent ID: 9232605
Filing Date: 2016-01-05
CPC Classification: H05B,Y02B

Claim Text:
1. A load driving circuit with charge spike protection, comprising: a converting circuit, adapted to be coupled to an input power source and supply a driving power source at an output end to drive a load, wherein the converting circuit has an output capacitance coupled to the output end thereof; a converting controller, controlling an amount of the driving power source responsive to a current or a voltage of the load; a load driving modulator, coupled to the output end of the converting circuit by being connected in series with the load, and adjusting an electronic state of the load; a charge spike protection circuit, coupled to the output capacitance and at least one connecting node of the load and the load driving modulator to provide an unidirectional charge release path to the output capacitance; and an auxiliary charge spike protection circuit having a plurality of RC circuits, wherein each RC circuit is connected to a corresponding connecting node of the load and the load driving modulator.