IS32LT3178-GRLA3-TR

Overview

The IS32LT3178-GRLA3-TR is a linear constant current LED driver manufactured by Lumissil Microsystems. It provides a single output channel with a maximum output current of 200mA and supports PWM dimming at a frequency of 1kHz. The device operates within a supply voltage range of 2.5V to 5.5V and can handle output voltages up to 42V. It is housed in an 8-SOP-EP package (5.0mm x 6.0mm) and is rated for automotive applications, functioning reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Linear constant current regulation for stable LED performance
• Integrated 1kHz PWM dimming capability
• Automotive-grade reliability with AEC-Q100 qualification

Applications

• Automotive interior lighting systems
• General illumination applications requiring linear drive
• LED backlighting modules

Procurement Notes

Verify the specific suffix GRLA3-TR against official Lumissil documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage limits and thermal requirements before integration. Cross-reference datasheet revisions to confirm pinout consistency and electrical characteristics match design constraints.

Selection Notes

Select this component for designs requiring a single-channel linear LED driver with integrated PWM dimming. It is suitable for low-voltage supply environments where simplicity and cost-effectiveness are prioritized over high-efficiency switching topologies. Verify that the 200mA current rating meets the target LED string requirements.

Part Context

This part belongs to the IS32LT31xx family of high-side linear LED drivers from Lumissil Microsystems. These devices are designed for automotive and industrial lighting applications, offering simple control interfaces and robust fault protection features within a compact surface-mount package.

Replacement Considerations

IS32LT3173-GRLA3-TR is listed as a similar alternative by distributors.