ISL97672
6-Channel LED Driver
Not Recommended for New Designs.
Recommended Replacement Parts ISL97671A, ISL97672B.
Key Features
- 6 Channels
- 4.5V to 26.5V Input
- 45V Output Max
- Up to 40mA LED Current per channel
- Direct PWM Dimming without Phase Shift
- PWM Dimming Linearity 0.4%~100% <30kHz
- Adjustable 200kHz to 1.4MHz Switching Frequency
- Dynamic Headroom Control
- Protections with Flag Indication
- String Open/Short Circuit, VOUT Short Circuit, Overvoltage and Over-Temperature Protections
- Optional Master Fault Protection
- Current Matching ±0.7%
- 20 Ld 4mmx3mm QFN Package
Description
The ISL97672 is an integrated power LED driver that controls 6 channels of LED current for LCD backlight applications. The ISL97672 is capable of driving up to 78 LEDs from 4.5V to 26V or 48 LEDs from a boost supply of 2.7V to 26V and a separate 5V bias supply on the VIN pin.
The ISL97672 compensates for non-uniformity of the forward voltage drops in the LED strings with its 6 voltage controlled-current source channels. Its headroom control monitors the highest LED forward voltage string for output regulation, to minimize the voltage headroom and power loss in a typical multi-string operation.
The ISL97672 allows direct PWM mode by following the external signal from 0Hz to 30KHz at 0.4% to 100% duty cycle and maintaining a typical ±0.7% current matching between channels.
The ISL97672 features a separate EN pin and extensive protection functions that flag whenever a fault occurs. The protections include string open and short circuit detections, OVP, OTP, thermal shutdown and an optional input overcurrent protection with fault disconnect switch.
Applications
- Notebook Displays LED Backlighting
- LCD Monitor LED Backlighting
- Automotive Displays LED Backlighting
- Automotive or Traffic Lighting
