发明名称 |
LIGHT-EMITTING DIODE LIGHTING DEVICE |
摘要 |
There is provided an LED lighting device having a satisfactory temperature characteristic and a small amount of variation in output current. The step-down chopper is provided with a first circuit including the switching element, the impedance means and a first inductor connected in series and a second circuit including the first inductor and a diode connected in series. A self-excited drive signal generation circuit is provided with a second inductor magnetically coupled with the first inductor and applies a voltage induced in the second inductor to the switching element to keep the switching element on. A turn-off circuit outputs an output voltage when the voltage of the impedance means detected by a comparator exceeds the reference value, and the output voltage allows a switching element to turn on to short-circuit the output terminals of the self-excited drive signal generation circuit, resulting in that the switching element is turned off.
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申请公布号 |
US2010097007(A1) |
申请公布日期 |
2010.04.22 |
申请号 |
US20090579784 |
申请日期 |
2009.10.15 |
申请人 |
TOSHIBA LIGHTING & TECHNOLOGY CORPORATION;KABUSHIKI KAISHA TOSHIBA |
发明人 |
KAMATA MASAHIKO;OSAKI HAJIME;OTAKE HIROKAZU;HAKUTA SHINYA;HIRAMATSU TAKURO;HIRAOKA TOSHIYUKI;IWAI NAOKO |
分类号 |
H05B41/36 |
主分类号 |
H05B41/36 |
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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