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Li-Ion Driver for 8 White LEDs (TPS61161)

2014-12-23 23:18  
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This article describes the Li-Ion Driver for 8 White LEDs (TPS61161). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:TPS61161.

We can use boost converter such as TPS61160/1 with a 40V rated integrated switch FET to drive up to 10 LEDs in series. We can use it to reduce output ripple, improve conversion efficiency, and allows for the use of small external component. The external sensor resistor Rset is set on the default white LED current with feedback voltage is regulated to 200mV. The LED current can be controlled using the 1-wire digital interface through the CTRL pin during the operation or we can use a pulse width modulation (PWM) signal which is apply to the CTRL pin through which the duty cycle determines the feedback reference voltage. For maximum protection, the device features integrated open LED protection that turn the TPS61160/1 off during open LED conditions to prevent the output from exceeding the absolute maximum ratings.

Li Ion Driver for 8 White LEDs circuit schematic diagram

 


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