IS31LT3173-GRLS2-TR

Overview

The IS31LT3173-GRLS2-TR is a single-output linear LED driver IC from Lumissil Microsystems, designed for general lighting applications. It features an internal power MOSFET and supports PWM dimming with a maximum output current of 200mA. The device operates within a supply voltage range of 5V to 42V and offers excellent temperature stability adjustable via a single external resistor. Packaged in an 8-SOP-EP (SOIC) format with an exposed pad, it is rated for an operating temperature range of -40°C to 125°C.

Feature Summary

• Integrates an internal power MOSFET for monolithic design flexibility
• Supports linear regulation with precise PWM dimming capabilities
• Provides built-in protections to ensure extended-life operation

Applications

• Commercial general lighting systems
• Residential lighting fixtures
• Automotive interior illumination

Procurement Notes

Verify the specific suffix GRLS2 against the official datasheet to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements for your assembly process. Ensure the ordering quantity aligns with standard vendor packaging constraints. Cross-reference the manufacturer part number with distributor codes to avoid substitution errors during procurement.

Selection Notes

Select this component for designs requiring a compact, single-channel solution with integrated switching elements. It is suitable for applications needing simple resistor-based current setting and reliable thermal performance. Consider the 8-SOP-EP package for efficient heat dissipation in space-constrained PCB layouts. Validate that the 42V maximum supply voltage meets the system's input requirements.

Part Context

This part belongs to the Lumissil HBLED Drivers portfolio, which addresses general lighting markets through both monolithic and controller-based solutions. The series is optimized for commercial, residential, and automotive sectors, offering design flexibility and protection features for robust long-term operation in various environmental conditions.

Replacement Considerations

The IS31LT3172-GRLS2-TR is a documented variant within the same family. Verify functional equivalence regarding pinout and electrical characteristics before substitution. No other public substitute part numbers are confirmed for this specific model.