发明名称 |
Dimming buck type LED driving apparatus |
摘要 |
A dimming buck type light emitting diode (LED) driving apparatus includes a main switch controlling a driving current flowing into an LED; a current detector detecting a driving current flowing into the LED; a power level determination unit determining a level of the driving power; a dimming capacitor for dimming control; a dimming control unit controlling charging and discharging of the dimming capacitor according to a power level determination signal and an enable signal; a reset circuit unit generating a reset signal according to a detection voltage from the current detector and a voltage of the dimming capacitor; a pulse generation unit generating a pulse signal; and a latch set by the pulse signal of the pulse generation unit and reset by the reset signal of the reset circuit unit to generate a switching signal, and turning on and off the main switch using the switching signal.
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申请公布号 |
US2009322247(A1) |
申请公布日期 |
2009.12.31 |
申请号 |
US20080213809 |
申请日期 |
2008.06.25 |
申请人 |
SAMSUNG ELECTRO-MECHANICS CO., LTD. |
发明人 |
GOO BON AHM;MIN BYOUNG OWN;LEE YOUNG JIN;HA CHANG WOO;CHEON JEONG IN |
分类号 |
H05B41/36;H01L33/00;H05B37/02 |
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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