Stabilizer circuit for high-voltage discharge lamp

An electronic stabilizer for a high-voltage discharge lamp, comprising:

• a rectifying unit for converting an AC voltage to a DC voltage through full-wave rectification;
• a power factor correction (PFC) circuit for controlling a power factor of the DC voltage output from the rectifying unit;
• a booster for boosting the voltage having the power factor controlled by the PFC circuit;
• a buck converter for converting the DC voltage boosted by the booster to a modified DC voltage;
• a commutator for controlling the DC voltage output from the buck converter to provide constant current;
• an igniter for receiving the voltage output from the commutator to generate a high voltage, wherein the high-voltage discharge lamp is turned on by the high voltage generated by the igniter;
• a current detector for detecting current in response to the high-voltage discharge lamp being turned on and the high voltage being fed back from the igniter;
• a voltage detector for detecting the voltage output from the buck converter;
• an igniter voltage controller for receiving the voltage output from the igniter and controlling the voltage so that the voltage is not applied to the igniter when abnormality in the high-voltage discharge lamp occurs;
• a watchdog timer for comparing the detected voltage with a preset reference voltage to output a signal for sensing whether there is abnormality in the high voltage at set time intervals;
• and
• a current and voltage error sensor for receiving the current from the current detector, the voltage from the voltage detector, and a signal for sensing whether there is abnormality in the high voltage output from the watchdog timer, to thereby sense abnormality in the voltage applied to the high-voltage discharge lamp.