| 摘要 |
<p>The present invention relates to an LED driving apparatus for controlling a color temperature. The LED driving apparatus for controlling the color temperature according to one aspect of the present invention includes a voltage selecting unit which selects one voltage level among preset voltage levels which are divided into at least two parts according to an external input, and generates and outputs a voltage level selection signal based on the selected voltage level, a gate driving unit which generates and outputs a gate driving signal composed of a pulse width modulation signal which is on or off according to a preset duty value and changes the voltage level of the gate driving signal according to the voltage level selection signal, a transistor which amplifies the gate driving signal from a gate, amplifies the gate driving signal according to preset transconductance, and outputs a drain-source current, and an LED which is on or off according to the output of the drain-source current.</p> |
