| 摘要 |
<p>A power supply for a lamp comprising a light emitting diode is provided to generate uniform light by supplying a contest power to each group through a branch circuit. A power supply unit of an LED lamp comprises a rectifier circuit(100) and a power factor correction circuit(200). A rectifier circuit rectifies the AC voltage to the DC voltage, and the power factor correction circuit comprises a boost circuit, resistors. The boost circuit converts the DC voltage rectified by a switching element into a higher output voltage, and a switching controller controls the switching element in order to maintain the output voltage constantly. A first and a second resistor are serially connected between an input terminal and the ground of the boost circuit. A third and a fourth resistor are serially connected between the output terminal and ground of the boost circuit.</p> |
