LED DRIVE CIRCUIT FOR FLASH AND ELECTRONIC APPARATUS PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an LED drive circuit for flash having excellent transition responsiveness from low current driving to flash current driving and having high efficiency.SOLUTION: The LED drive circuit for flash includes: a booster circuit whose input voltage is voltage of a battery; an electric double layer capacitor that is charged by the booster circuit and drives an LED element with an output current; a step-down circuit whose input power supply is the electric double layer capacitor and whose output is a cathode side of the LED element; and a power switch element for feeding a large current to the LED element.