发明名称 |
HIGH EFFICIENCY LED DRIVER WITH CURRENT SOURCE REGULATIONS |
摘要 |
The present invention provides a control circuit for LED driver. A voltage-feedback circuit is coupled to LEDs to sense a voltage-feedback signal for generating a voltage loop signal. Current sources are coupled to the LEDs to control LED currents. A detection circuit is connected to sense voltages of current sources for generating a current-source loop signal in response to a minimum voltage of the current sources. Furthermore, a buffer circuit generates a feedback signal in accordance with the voltage loop signal and the current-source loop signal. The feedback signal is coupled to limit a maximum voltage of the LEDs and regulate the minimum voltage across the current sources.
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申请公布号 |
US2011080109(A1) |
申请公布日期 |
2011.04.07 |
申请号 |
US20100762386 |
申请日期 |
2010.04.19 |
申请人 |
YANG TA-YUNG;AHN BYUNG-HAK;CHUNG JIN-HWA;CHEN CHUN-CHI |
发明人 |
YANG TA-YUNG;AHN BYUNG-HAK;CHUNG JIN-HWA;CHEN CHUN-CHI |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
代理机构 |
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主权项 |
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地址 |
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