LED DRIVER CIRCUIT
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United States of America Patent
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N/A
Issued Date -
Jul 24, 2014
app pub date -
Jun 26, 2013
filing date -
Jan 21, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A LED driving circuit is provided. The LED driving circuit includes: an output transistor, having a drain coupled to an LED; a node, coupled to a source of the output transistor; a ground transistor, having a drain coupled to the node, and a source coupled to the ground; an operational amplifier, including: an input stage, for receiving a driving signal and a feedback signal, including a first input end and a second input end; and an output stage, for providing an output signal to a gate of the output transistor; and a first switch assembly, coupled to the driving signal, the feedback signal and the input stage of the operational amplifier, for providing the driving signal to one of the first input end and the second input end of the operational amplifier and coupling the node to the other of the first input end and the second input end of the operational amplifier.
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