LED DRIVER, AND LED DRIVE CIRCUIT DEVICE AND ELECTRONIC EQUIPMENT THAT USE SAID LED DRIVER

摘要

An LED driver comprising: an LED constant current source connected to a plurality of LED strings individually with an LED connection terminal interposed therebetween; a selection unit for selecting the LED connection terminal of the LED string, among the plurality of LED strings, for which the LED forward total voltage is greatest as a subsequent detection LED connection terminal; and a comparator for comparing the voltage of the detection LED connection terminal and a first reference voltage; a feedback voltage for which the output voltage has undergone voltage-division undergoing voltage transformation on the basis of the output of the comparator.