LED DRIVING APPARATUS AND OPERATING METHOD THEREOF
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United States of America Patent
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Issued Date -
Mar 13, 2014
app pub date -
Sep 12, 2013
filing date -
Sep 13, 2012
priority date (Note) -
Abandoned
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Abstract
A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes an output stage, a reference voltage regulator, a first input resistor, a second input resistor, and a controller. The output stage includes at least one LED. The reference voltage regulator is coupled to an input voltage and used to receive the input voltage and output a reference voltage signal. One end of the first input resistor is coupled to a node. One end of the second input resistor is coupled to the node, and the other end of the second input resistor is coupled to ground. The controller receives the reference voltage signal from the reference voltage regulator and receives a divided voltage signal from the node respectively, and outputs a setting voltage signal to the output stage.
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