ISL97635IRZ-TK

Overview

The ISL97635IRZ-TK is an SMBus-controlled LED display driver manufactured by Renesas Electronics Corporation. It features eight output channels capable of driving up to 80 LEDs in a segment configuration. The device operates with a supply voltage range of 6V to 24V and supports a maximum output voltage of 34.5V. It utilizes a boost DC-DC converter topology with selectable switching frequencies of 600kHz or 1.2MHz. The component is housed in a 24-pin QFN package with an exposed pad, designed for surface-mount installation.

Feature Summary

• SMBus interface enables digital control over current regulation and dimming functions
• Dynamic headroom control minimizes power loss by monitoring the highest forward voltage string
• Supports multiple dimming methods including SMBus PWM/DC, external PWM, and analog inputs
• Integrated protections include open circuit detection, short-circuit detection, and over-temperature shutdown

Applications

• LCD backlight systems requiring multi-channel current regulation
• LED display segments driven via SMBus communication
• Portable electronic devices utilizing efficient boost converter topologies

Procurement Notes

Verify component authenticity through authorized distributors as this part is obsolete. Confirm package integrity and moisture sensitivity level handling procedures prior to assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications. Check for available replacement alternatives due to end-of-life status.

Selection Notes

Select this component for designs requiring precise current matching across multiple LED strings. Ensure the input voltage range aligns with system power rails. Verify thermal management capabilities within the specified operating temperature range. Consider the 24-QFN footprint constraints during PCB layout planning.

Part Context

This IC belongs to the ISL97635 family of digitally controlled LED drivers. It integrates an internal switch and regulates current for LCD backlight applications. The series emphasizes uniformity compensation and flexible dimming controls for high-performance display solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for obsolescence management options.