ISL97683IRTZ-T

Overview

The ISL97683IRTZ-T is a highly integrated 3-channel LED driver IC from Renesas Electronics, designed for medium-size TFT-LCD backlight applications. It operates as a DC-DC boost controller with an adjustable switching frequency ranging from 200kHz to 1.2MHz. The device supports analog and PWM dimming methods and delivers up to 160mA per channel. It functions within a supply voltage range of 9V to 32V and is housed in a 28-WFQFN exposed pad package. The component is rated for operation between -40°C and 105°C.

Feature Summary

• Features dynamic headroom control that monitors the highest LED forward voltage string to optimize minimum output regulation.
• Incorporates adaptive boost switching architecture enabling direct PWM dimming with high linearity performance.
• Includes comprehensive fault protection mechanisms such as string open/short circuit detection, overvoltage protection, and overtemperature protection.

Applications

• Tablet PC displays
• Notebook PC displays
• Portable media player LED backlighting

Procurement Notes

Verify current availability status as this part number may be subject to discontinuation notices. Confirm package markings and revision levels against official datasheets before integration. Check for alternate manufacturing site certifications if required by specific quality standards. Ensure compatibility with existing PCB footprints and thermal management designs.

Selection Notes

Select this component for designs requiring three independent LED channels with precise current regulation. Consider its wide input voltage range and flexible switching frequency options for efficient power conversion. Evaluate the need for analog versus PWM dimming capabilities based on system requirements. Verify that the 28-pin QFN package fits within the available board space constraints.

Part Context

This device belongs to the ISL9768x series of LED drivers, which includes variants with different channel counts. These components are engineered specifically for portable electronics where space efficiency and power management are critical. The series shares common architectural features like dynamic headroom control and extensive fault protection across all models.

Replacement Considerations

Consult official substitution lists for equivalent parts with matching channel counts and electrical specifications. Verify pin-to-pin compatibility and thermal characteristics when considering alternative manufacturers or updated series revisions.