6 Channels, Adjust LED Current up to 45mA
2.5V to 24V Input Range
WLED Open Protection
OVP and Thermal Protection
Adjustable 600kHz to 2MHz Switching Frequency
Wide PWM Input Frequency: 100Hz to 20kHz
Analog and Direct PWM Mode Control
Internal Soft-Start and 40V Power MOSFET
Maximum ±1.5% Current Matching
Maximum ±3.0% Current Accuracy
Adjustable OVP Voltage
Compact WQFN24L-4 x 4 Package
General Description

AAT1597 is a DC-DC converter with 6-strings white LEDs backlight driver. It’s input voltage can be operated from 2.5V to 24V. It can drive 6-strings of LEDs using current balance. The mismatch current of every string is within ±1.5%. The maximum mismatch among each IC is ±3.0%. The OVP pin can be setup for different LEDs configuration.
AAT1597 provides protection when the LEDs are in open conditions. The protective function closes the open LEDs string and keep the others working. Users can use the PWM pin to adjust the brightness of these LEDs strings.
AAT1597 offers a simple and economical solution for LCD white LEDs backlight driver.


Notebook Panel Backlight
LCD Monitors Backlight
LCD Panel for Portable Devices