DATASHEET
ISL97671A
6-Channel SMBus/I2C FN7709
Rev.4.00
Sep 14, 2017 or PWM Dimming LED Driver with Phase Shift Control Features The ISL97671A 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 ISL97671A can drive six channels of
LEDs from an input of 4.5V~26.5V to an output of up to 45V. It
can also operate from an input as low as 3V to an output of up
to 26.5V in bootstrap configuration (refer to Figure 38 on
page 26). 6 x 50mA channels 4.5V to 26.5V input with 45V maximum output 3V (see Figure 38 on page 26) to 21V input with 26.5V
maximum output PWM dimming with phase shift control The ISL97671A features optional channel phase shift control
to minimize the input/output ripple characteristics, and load
transients to improve efficiency and eliminate audible noise. SMBus/I2C controlled PWM or DC dimming Direct PWM dimming PWM dimming linearity The device can also be configured for Direct PWM Dimming
with a minimum dimming duty cycle of 0.007% at 200Hz. -PWM dimming with adjustable dimming frequency and
duty cycle linear from 0.4% to 100% <30kHz The ISL97671A headroom control circuit monitors the highest
LED forward voltage string for output regulation, to minimize
the voltage headroom and power loss in a typical multi-string
operation. -Direct PWM dimming duty cycle linear from 0.007% to
100% at 200Hz Current matching В±0.7% The ISL97671A is offered in a compact and thermally efficient
20 Ld QFN 4mmx3mm package. 600kHz/1.2MHz selectable switching frequency Dynamic headroom control Related Literature Fault protection
-String open/short-circuit, OVP, OTP, and optional output
short-circuit fault protection 20 Ld 4mmx3mm QFN package For a full list of related documents, visit our website …
