<p>PURPOSE: A low power led driving apparatus minimizes the fluctuation of the total consuming power and LED consuming power, enhancing power-converting efficiency. CONSTITUTION: A rectifier rectifies AC input power to DC input power. A constant voltage unit receives output voltage and outputs constant voltage. An over-current detection unit (13) prevents burn-out of a device. An input voltage controller (14) reduces the output voltage and maintains power consumption to mean power. A load power-setting part (15) increases the output voltage and maintains the power consumption to the mean power. [Reference numerals] (10) Rectifying unit; (11) Smoothing unit; (12) Constant voltage unit; (13) Over-current detection unit; (14) Input voltage controller; (15) Load power-setting part; (16) LED load</p>
