概觀
IS31BL3506B is a boost converter featuring an
integrated MOSFET switch designed for driving series
strings of LED or other device. Input operating voltage
range is 2.7V~5.5V. The device regulates the LED load
current is set using an external, low value sensing
resistor. The device adjusts the PWM duty cycle of the
switch to maintain the voltage at the FB pin at a value
of 0.2V. The IS31BL3506B operates at a constant
switching frequency of 1.0MHz to allow for small
component size. IS31BL3506B features an over
voltage shutdown pin which prevents the output
voltage from exceeding 35V (typ.) in the case of an
open circuit condition. The device is offered in a tiny
TSOT-23-6 and SOT-23-6 package and a temperature
rating from -40°C ~ +85°C.