LED driver having short circuit protection
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United States of America Patent
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-
Nov 22, 2016
Grant Date -
Sep 15, 2016
app pub date -
Mar 9, 2016
filing date -
Mar 10, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An LED driver having short circuit protection includes a power, a controlling module coupled to the power and be configured to control output thereof, a sampling module electrically connected to the controlling module, a switch controlling module coupled to the sampling module, and a second switch coupled to the switch controlling module 40 and the output end of the power. The controlling module includes a first switch. The sampling module gets a low level signal during that short circuit is occurred in the first switch. When the switch controlling module receives the low level signal, it turns off the second switch so as to reduce the input voltage of the controlling module. The LED driver having short circuit protection can protect the first switch and load during that short circuit is occurred in the first switch.
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