DIGITAL SMPS APPARATUS FOR SUPPLYING POWER TO AN LED USING A MIRROR CIRCUIT SYSTEM

摘要

The present invention relates to a digital SMPS apparatus for supplying power to an LED using a mirror circuit system which can adjust a current amount of the LED without including passive devices such as a switching device for supplying power, an inductor for stabilizing a current, and a condenser. The SMPS apparatus includes: a power supply part including AC input terminals connected to a reference terminal in series and a bridge rectifier circuit connected to the AC input terminal in series to supply rectified power into an initial LED and a supplying power control part; and the supplying power control part including a built-in mirror circuit to detect an output voltage and current of a 1st row to an nth row, thereby controlling an output voltage and current so that the output voltage and current are constantly maintained according to a change of the output voltage and current of the 1st row to nth row. Thus, since the digital SMPS apparatus includes the mirror circuit, passive devices such as an inductor and a capacitor are not required. Therefore, an LED device may have an increased life cycle.