Overview: ISL97671 OBSOLETE PRODUCT REMENDED REPLACEMENT PART
ISL97671A or ISL97672B 6-Channel SMBus/I2C or PWM Dimming LED Driver with Phase Shift Control DATASHEET
FN7631 Rev.4.00 Sep 7, 2017 The ISL97671 is a 6-Channel 45V dual dimming capable LED driver that can be used with either SMBus/I2C or PWM signal for dimming control. The ISL97671 drives 6 channels of LED to support 78 LEDs from 4.5V to 26V or 48 LEDs from a boost supply of 2.7V to 26V and a separate 5V bias on the ISL97671 VIN pin.
The ISL97671 pensates for non-uniformity of the forward voltage drops in the LED strings with its 6 voltage controlled-current source channels. Its headroom control monitors the highest LED forward voltage string for output regulation, to minimize the voltage headroom and power loss in a typical multi-string operation.
