发明名称 |
Circuits and methods for driving light sources |
摘要 |
A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal. |
申请公布号 |
US8664895(B2) |
申请公布日期 |
2014.03.04 |
申请号 |
US201213556690 |
申请日期 |
2012.07.24 |
申请人 |
YAN TIESHENG;LI YOULING;LIN FENG;SU XINHE;KUO CHING-CHUAN;O2MICRO, INC. |
发明人 |
YAN TIESHENG;LI YOULING;LIN FENG;SU XINHE;KUO CHING-CHUAN |
分类号 |
H05B37/02;G05F1/00;H05B37/00;H05B39/00;H05B39/02;H05B39/04;H05B41/00;H05B41/16;H05B41/24;H05B41/36 |
主分类号 |
H05B37/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|