发明名称 |
Highly efficient driving of photoflash diodes using low and fixed voltage drop-out current sink |
摘要 |
A circuit according to the present invention is used for driving a photoflash diode and comprises a current sink, a feedback circuit, and a DC-DC converter. The current sink is coupled to the photoflash diode for controlling the current through the photoflash diode. The feedback circuit receives a feedback signal indicative of the electrical condition of said first current regulator. The DC-DC converter is coupled to an external power source and the feedback circuit for powering the photoflash diode so as to control the electrical condition of the current sink to a predetermined value.
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申请公布号 |
US7375472(B2) |
申请公布日期 |
2008.05.20 |
申请号 |
US20050148529 |
申请日期 |
2005.06.08 |
申请人 |
02MICRO INTERNATIONAL LIMITED |
发明人 |
WONG FOOTSHEN;POPESCU-STANESTI VLAD;HAN MINGKWONG;HOU XIACHUA;LIN CHUNHSI |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
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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