发明名称 |
Multi-phase input dimming ballast with flyback converter and method 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 second rectifier circuit is connected between the second AC source and a first switching circuit. A control circuit selectively energizes the first and second switching circuits 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.
|
申请公布号 |
US7230391(B2) |
申请公布日期 |
2007.06.12 |
申请号 |
US20050118634 |
申请日期 |
2005.04.29 |
申请人 |
OSRAM SYLVANIA, INC. |
发明人 |
RAVINDRA THOTAKURA VENKATA;CHOUDHURY AYAN KUMAR |
分类号 |
H05B37/02;H05B41/28;H05B41/392 |
主分类号 |
H05B37/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|