| 摘要 |
A discharge lamp driving circuit drives a discharge lamp using a high frequency wave, to start the lamp. A booster/chopper circuit has a switching element FET 1 , and boosts an input power supply voltage by switching the switching element. A boosting transformer supplies the discharge lamp with the voltage boosted by the booster/chopper circuit. A booster/driver circuit supplies the switching element FET 1 of the booster/chopper circuit with a driving signal having a frequency of 10 to 200 kHz, thereby limiting the peak loss of the switching element FET 1 to 200 W or less.
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