DATASHEET
ISL97682, ISL97683, ISL97684 FN7689
Rev.2.00
Sep 19, 2017 Compact 2-3-4-Ch LED Drivers with Phase Shift Control
The ISL97682, ISL97683, ISL97684 are Intersil’s highly
integrated 2-3-4-channel LED drivers that are suitable for
medium size TFT-LCD backlights. These parts can drive
multiple channels of LEDs from inputs as low as 4V to outputs
of up to 45V. They can also operate from inputs as low as 3V to
outputs of up to 26.5V in bootstrap configuration (see Figure
26 for 3V operation). Features The ISL97682, ISL97683, ISL97684 feature optional channels
phase shift control. This feature is used to minimize the input,
output ripple characteristics and load transient, which help
eliminate or reduce the video and audio noise interference
from the backlight driver operation. Input Voltage 3.0V (see Figure 26)~24V with Max VOUT of 26.5V The ISL97682, ISL97683, ISL97684 offer 8-bit PWM dimming
for systems that need frequency tuning flexibility. With the
unique adaptive boost switching architecture, the ISL97682,
ISL97683, ISL97684 also offer Direct PWM dimming with
output, which follows input and achieves linearity as low as
0.009% at 200Hz or 1.35% at 30kHz.
The drivers incorporate dynamic headroom control that monitors
the highest LED forward voltage string and uses its feedback
signal for the minimum output regulation. The ISL97682, …