LED driver circuit, LED lighting device, and LED driver circuit control method

摘要

The controller of the LED driver circuit has a first inductor having one end connected to the first battery terminal, one end connected to the other end of the first inductor, and the other end connected to the second battery terminal. A switching element; a capacitor having one end connected to the other end of the first inductor; a second inductor having one end connected to the other end of the capacitor and the other end connected to the output terminal; A rectifying element connected to the battery terminal and having the other end connected to the other end of the capacitor, the direction from the other end of the capacitor toward the second battery terminal being a forward direction, and a first current flowing through the second inductor And a control unit that performs on / off control of the switching element.