NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PARTS
ISL97671A or ISL97672B ISL97673 DATASHEET
FN7633
Rev.3.00
Sep 19, 2017 6-Channel SMBus or PWM Dimming LED Driver with Phase Shift Control Features The ISL97673 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
ISL97673 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 ISL97673
VIN pin. 6 channels 4.5V to 26.5V input 45V output max Up to 40mA LED current per channel Extensive dimming control The ISL97673 compensates for non-uniformity of the
forward voltage drops in the LED strings with its six
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. -PWM/DPST dimming, I2C 8-bit with equal phase
shift, and 0.007% direct PWM dimming at 200Hz Optional master fault protection PWM dimming linearity 0.4%~100% <30kHz 600kHz/1.2MHz selectable switching frequency Dynamic headroom control The ISL97673 features optional channel phase shift
control to minimize the input, output ripple
characteristics, and load transients, as well as
spreading the light output to help reduce video and
audio interference from the backlight driver operation. …
