| 摘要 |
A ballast (100) and method for regulating power in a high pressure dischar ge lamp (130) is disclosed. In a preferred embodiment, ballast (100) comprises a microcontroller (102), a buck converter (110), and an inverter (120). Microcontroller (102) monitors a signal representative of the lamp voltage and sets a curren t in the lamp based upon the monitored signal via control of a buck current provided by the buck converter (110). A method for regulating power in a high pressure discharge lamp is also described. The method comprises steps of detecting (202) a voltage at the lamp and setting (204) a current in the lamp based upon the detected voltage.
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