APPARATUS FOR CONTROLLING LED POWER USING TRIAC DIMMER

摘要

The present invention provides an alternating current (AC) dimming type light emitting diode (LED) lamp control device using a phase control dimmer for incandescent lamp which improves compatibility and convenience while reducing cost. The LED light control device according to the present invention comprises: a phase control dimmer which controls brightness of an LED lamp by controlling a phase angle of an AC source; a rectification circuit which rectifies the phase-controlled AC source; a power factor correction circuit which corrects a power factor for the rectified AC source; a dimmer discrimination circuit which discriminates a type of the phase control dimmer; a switching circuit which performs switching under the control of the dimmer discrimination circuit; an output voltage and current regulation circuit which regulates an output voltage and an output current according to a load of the LED lamp; a voltage and current detection circuit which senses the output voltage and the output current and delivers the output voltage and current to the switching circuit; and an output high frequency rectification circuit which rectifies the regulated output voltage and current. The rectification circuit is composed of a first diode, a second diode which is connected in a reverse direction with respect to the first diode, and a bridge rectification circuit. The first diode, the second diode, and four diodes constituting the bridge rectification circuit are configured using high speed switching diodes operating at a fast speed which is at least not slower than 100 ns.