| 摘要 |
PURPOSE: An electronic stabilizer circuit is provided to improve the optical efficiency of a lamp and reduce the flicker noise by applying the current of square wave to the lamp. CONSTITUTION: An electronic stabilizer circuit includes a boost converter(16), a buck converter(18), a half bridge type lamp driving circuit(20), and a lamp current detection circuit(38). The boost converter(16) is used for improving a power factor of an electronic stabilizer and generating stably the high DC voltage. The buck converter(18) is used for receiving the output of the boost converter(16) and generating the DC voltage to drive a lamp. The half bridge type lamp driving circuit(20) is used for receiving an output of the buck converter(18), generating the high voltage and a square wave of a predetermined frequency to drive stably the lamp, and outputting a lamp current detection signal. The lamp current detection circuit(38) is used for receiving the lamp current detection signal and generating the first switching control signal to control a switching period of the buck converter(18).
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