Patent ID: 9585208
Date: 2017-02-28
CPC Classifications: H05B,Y02B

Claim:
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 gate electrode, a drain electrode and a source electrode; and a second switch including a gate electrode, a drain electrode and a source electrode, wherein: the first switch and the second switch are field effect transistors; the gate 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 gate electrode of the second switch is connected to the source electrode of the first switch through a thermistor.