Patent ID: 8587220

Claim:
A power converter comprising: a first direct current converter configured to convert alternating current voltage from an alternating current power supply through a line filter, into direct current voltage, and to correct a power factor; and a second direct current converter configured to electrically isolate the first direct current converter and an LED group load from each other, and to covert the direct current voltage from the first direct current converter, into predetermined direct current voltage and then supply the predetermined direct voltage to the LED group load, wherein the second direct current converter includes: a transformer configured to isolate a primary side and a secondary side from each other by using a primary winding and a second winding; a rectifying/smoothing circuit disposed on the secondary side, and configured to include a diode and a capacitor in order to output the predetermined direct current voltage; a pulse signal generator configured to generate pulse signal for regulating a current flowing into the LED group load; and at least one switching element disposed on the primary side, and configured to transfer power to the secondary side through the transformer by being turned on/off according to the pulse signal.