LED DRIVING APPARATUS AND OPERATING METHOD THEREOF
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United States of America Patent
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Issued Date -
Mar 20, 2014
app pub date -
Sep 18, 2013
filing date -
Sep 18, 2012
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Abandoned
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Abstract
A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes a controller and an output stage. The output stage includes at least one LED, a switch, and a setup resistor. The at least one LED, the switch, and the setting resistor are coupled in series between an input voltage and ground. The controller is coupled to the input voltage and the switch respectively. The controller receives at least one voltage sensing signal and outputs a setup voltage signal to the output stage. The at least one voltage sensing signal is received from the node between the at least one LED and the switch, between two LEDs, or between two voltage dividing resistors coupled in series between the input voltage and ground.
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