6-Channel LED Driver with Ultra Low Dimming Capability

The ISL97672B is an integrated power LED driver that controls six channels of LED current for LCD backlight applications. The ISL97672B is capable of driving LEDs from 4.5V to 26.5V, with a maximum output of 45V.

The ISL97672B employs an adaptive boost switching architecture that allows Direct PWM dimming with linearity as low as 0.007 at 200Hz or 0.8 at 20kHz. Dimming can be as high as 30kHz.

Features

• 6 x 50mA Channels

• 4.5V to 26.5V Input

• 45V Output Max

• Adaptive Boost Switching Architecture

• Direct PWM Dimming with Dimming Linearity of 0.007~100 at 200Hz or 0.8~100 <20kHz

• Adjustable 200kHz to 1.4MHz Switching Frequency

• Dynamic Headroom Control

• Fault Protections with Latched Flag Indication

- String Open/Short Circuit

- OVP

- OTP

- Optional Output Short-Circuit Fault Protection Switch

• Current Matching ±0.7

• 20 Ld 3x4 QFN Package

Applications

• Notebook Displays LED Backlighting

• LCD Monitor LED Backlighting

• Multi-Function Printer Scanning Light Source