ADAPTIVE CONTROL FOR HALF-BRIDGE UNIVERSAL LAMP DRIVERS

摘要

An adaptive compensation circuit (80, 90) for controlling a universal lamp driver (20) coupled to a lamp (10) is disclosed. The adaptive compensation circuit (80, 90) utilizes an identification of a lamp type of the lamp (10) to thereby generate a signal indicative of a time constant of the lamp (10). The adaptive compensation circuit (80, 90) subsequently determines a zero position (ZS) and a pair of pole positions (PS1, PS2) corresponding to the time constant, and generates a control voltage (VC) in response to a determination of the zero position (ZS) and the pair of pole positions (PS1, PS2). The control voltage (VC) facilitates an operation of the universal lamp driver (20) to stably provide a lamp current (IL) to the lamp (10).