Patent ID: 7834602
Filing Date: 2010-11-16
Classification: H05B

Abstract:
1. A feedback power control system for an electrical component that has first and second electrodes, and a work current flowing therethrough, said feedback power control system comprising: a multiplying unit having a first input terminal adapted for receiving a work voltage corresponding to a voltage drop between the first and second electrodes of the electrical component, a second input terminal adapted for receiving a feedback voltage corresponding to the work current flowing through the electrical component, and an output terminal for outputting a measuring voltage corresponding to a consumed power of the electrical component, a value of the measuring voltage being equal to a product of a value of the work voltage and a value of the feedback voltage; a control unit having a first input end coupled to said output terminal of said multiplying unit for receiving the measuring voltage therefrom, a second input end adapted for receiving a reference voltage, and an output end for outputting a control voltage corresponding to a voltage difference between the measuring voltage and the reference voltage; and a regulating unit providing the feedback voltage to said second input terminal of said multiplying unit, and including