Power supply apparatus for led lighting and led lighting apparatus using the power supply apparatus

An LED lighting apparatus, comprising:

• an LED lighting;
• a sensor board configured to provide a control signal for controlling a dimming of the LED lighting;
• and
• a power supply apparatus configured to comprise a power source unit configured to supply a rectified voltage, a voltage converter configured to comprise at least one first inductor and to convert the rectified voltage, an auxiliary coil configured to comprise a second inductor and to supply a detection voltage corresponding to current of the first inductor of the voltage converter, a controller configured to control current of the voltage converter using a driving pulse generated in response to a control signal and a sensing voltage fed back after sensing the current of the voltage converter, and a voltage regulation circuit configured to regulate the detection voltage and to supply the regulated voltage as an operating voltage for the controller and to supply a power to the LED lighting and a sensor board.