Led driving device and led lighting apparatus

An LED driving device which converts AC input power into desired DC output power and supplies the DC output power to a first LED load and a second LED load whose color temperature is different from a color temperature of the first LED load, the device comprising:

• a switching element configured to be controlled for on-off operation thereof;
• a plurality of ripple current reducers series-connected to the respective LED loads and configured to reduce current ripples flowing through the respective LED loads;
• and
• a control circuit configured to control the DC output power so that the DC output power has a predetermined value, by controlling on-off operation of the switching element based on a feedback voltage at a connecting point between each of the LED loads and a corresponding one of the ripple current reducers, wherein
• each of the ripple current reducers has a feedback-type constant current control circuit configured to perform control for varying impedance, and
• the device further comprises a color controller for performing color control by maintaining a total LED current value of the first LED load and the second LED load at a certain value.