6-Channel LED Driver with Ultra Low Dimming Capability

The ISL97672B is an integrated 6-channel power LED driver for LCD backlight applications. The ISL97672B is capable of driving LEDs with an input from 4.5V to 26.5V and a maximum output up to 45V.
The ISL97672B employs an adaptive boost switching architecture that allows direct PWM dimming with dimming duty cycle as low as 0.007% at 200Hz or 0.8% at 20kHz. PWM Dimming frequency can be as high as 30kHz.

Features
• 6 x 50mA channels
• 4.5V to 26.5V input
• 45V output maximum
• 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
    - Overvoltage Protection (OVP)
    - Over-Temperature Protection (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