LED lighting apparatus capable of color temperature control

A light-emitting diode (LED) lighting apparatus comprising:

• a color temperature controller to receive a color temperature selection signal and output a first control signal;
• an LED driver connected to a plurality of LED groups and configured to control driving current to be constant, the driving current flowing in each LED group;
• and
• an LED selection circuit comprising:
• a first switch connected to a first node to which a rectified voltage is applied and receiving the first control signal,
• a first LED group selectively connected to the first node by the first switch,
• a second LED group selectively connected to the first node by the first switch,
• a second switch connected to an output terminal of the first LED group and the second LED group, the first and second LED groups being connected in parallel,
• a third LED group selectively connected to the output terminal of the first and second LED groups by the second switch, and
• a fourth LED group selectively connected to the output terminal of the first and second LED groups by the second switch,
• wherein color temperatures of the first LED group and the third LED group are substantially equal but different from a color temperature of second LED group, and the color temperatures of the second LED group and the fourth LED group are substantially equal.