发明名称 |
Method and system for high efficiency, fast transient multi-channel LED driver |
摘要 |
System and method for a light emitting diode (LED) driver are disclosed. To supply an LED bus voltage to a large array of LEDs organized in multiple channels where one or more LEDs are connected in series in each channel, an LED driver includes a power converter, a feedback generation circuit, and a phase-division based controller. The power converter is configured for providing the LED bus voltage to the multiple LED channels based on a voltage control signal. The feedback generation circuit is configured for generating a feedback signal based on the LED bus voltage supplied to the multiple LED channels. The phase-division based controller is configured for generating the voltage control signal based on the feedback signal and information from the multiple LED channels. The phase-division based controller divides each pulse width modulation (PWM) of each channel into a tracking phase and a pre-charging phase so that the LED bus voltage supplied to the multiple channels changes between the tracking phase and the pre-charging phase. |
申请公布号 |
US8058810(B2) |
申请公布日期 |
2011.11.15 |
申请号 |
US20090437273 |
申请日期 |
2009.05.07 |
申请人 |
CHEN MIN;LEGATES BRYAN AVERY;LINEAR TECHNOLOGY CORPORATION |
发明人 |
CHEN MIN;LEGATES BRYAN AVERY |
分类号 |
H05B39/04 |
主分类号 |
H05B39/04 |
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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