| 摘要 |
A ballast for a fluorescent lamp incorporates in an integrated circuit (IC) complex circuit functions, such as driving a switchingarrangement that provides AC power to the lamp. Beneficially, such IC's may be widely available and inexpensive: Additional circuitry complements such IC by protecting against one or more of the following three conditions: (1) the lamp starting to significantly rectify current in either direction, (2) the lamp voltage exceeding a predetermined level for a prolonged duration, and (3) the power mains supply voltage falling below a predetermined level. |
