Undervoltage protection circuit for LED lamp
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United States of America Patent
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Mar 28, 2017
Grant Date -
Apr 2, 2015
app pub date -
Sep 26, 2014
filing date -
Sep 29, 2013
priority date (Note) -
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Abstract
An undervoltage protection circuit for LED lamp includes a DC/DC converter, and a controlling circuit module. The controlling circuit module includes a signal collecting unit configured for collecting a signal, a signal comparing unit electrically connected to the signal collecting unit, and a signal processing unit electrically connected to the signal comparing unit. The signal comparing unit is configured for comparing a signal input from the signal collecting unit with a threshold voltage. The signal processing unit is configured for processing the signal output of the signal collecting unit to turn on or turn off the DC/DC converter. Whenever the voltage input is less than the threshold voltage which indicates an undervoltage condition, the controlling circuit module produces a high level and causes the DC/DC converter to not work as a result. Inversely, the controlling circuit module drops to a low level and the DC/DC converter begins to work.
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