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LED POWER CIRCUIT USING DISCRETE COMPONENTS AND CONFIGURATION METHOD

  • US 20160249419A1
  • Filed: 10/17/2014
  • Published: 08/25/2016
  • Est. Priority Date: 03/14/2014
  • Status: Active Grant
First Claim
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1. A power circuit for a light emitting diode (LED) lighting device using discrete components, comprising:

  • a filtering unit configured to filter an inputted alternating current;

    a rectifying unit configured to convert the alternating current to a direct current;

    a transformer connected to the rectifying unit;

    a first switch including a grid electrode, a drain electrode and a source electrode; and

    a second switch including a grid electrode, a drain electrode and a source electrode, wherein;

    the first switch and the second switch are field effect transistors;

    the grid electrode of the first switch is connected to the drain electrode of the second switch;

    the drain electrode of the first switch is connected to the transformer;

    the source electrode of the first switch is connected to the source electrode of the second switch through a detection resistor; and

    the grid electrode of the second switch is connected to the source electrode of the first switch through a thermistor.

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