发明名称 |
MULTI-PHASE INPUT DIMMIMG BALLAST WITH FLYBACK CONVERTER ANDMETHOD THEREFOR |
摘要 |
An apparatus and method for powering a lamp connected to a ballast circuit. The ballast circuit is connected to a first alternating current (AC) source having a first phase and to a second AC source having a second phase. A first rectifier circuit is connected between the first AC source and a first switching circuit. A secon d rectifier circuit is connected between the second AC source and a first switching circuit. A control circuit selectively energizes the first and second switching circuit s to provide power from the first and second AC sources to the lamp load via an inverter circuit. A detection circuit generates a detection signal indicating whether power is being supplied by each the first and second AC sources. The detection signal is provided to a dimming regulation circuit to generate a dim level command signal for dimming the lamp.
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申请公布号 |
CA2537532(A1) |
申请公布日期 |
2006.10.29 |
申请号 |
CA20062537532 |
申请日期 |
2006.02.22 |
申请人 |
OSRAM SYLVANIA INC. |
发明人 |
CHOUDHURY, AYAN KUMAR;RAVINDRA, THOTAKURA VENKATA |
分类号 |
H05B41/38;H05B37/02;H05B41/16;H05B41/28;H05B41/392 |
主分类号 |
H05B41/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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