IS31FL3299-QFLS4-TR

Overview

The IS31FL3299-QFLS4-TR is a linear constant current LED driver IC manufactured by Lumissil Microsystems. It features nine independent output channels, each capable of sourcing up to 40mA. The device supports individual LED dimming via a 1MHz I2C-compatible interface with 12-bit PWM resolution. It operates within a supply voltage range of 2.7V to 5.5V and functions across an extended temperature range of -40°C to +125°C. The component is housed in a compact 20-pin QFN package measuring 3mm x 3mm.

Feature Summary

• Provides nine individually controllable constant current sinks for precise LED regulation
• Enables high-resolution 12-bit PWM dimming through a standard I2C compatible programming interface
• Supports operation over a wide industrial temperature range from -40°C to +125°C

Applications

• General LED lighting systems requiring multi-channel control
• Portable electronic devices with limited board space constraints
• Automotive interior illumination applications

Procurement Notes

Verify the specific suffix QFLS4 against the manufacturer's latest datasheet to confirm pinout and electrical specifications match your design requirements. Ensure the PCB footprint corresponds to the 20-QFN (3x3) package dimensions. Confirm that the I2C address configuration aligns with your system bus topology before finalizing procurement.

Selection Notes

Select this component when nine independent current sinks are required within a minimal footprint. It is suitable for designs needing high-resolution dimming control without external microcontrollers managing individual GPIO pins. Consider the linear topology efficiency implications at higher voltage differentials compared to switching alternatives.

Part Context

This part belongs to the IS31FL3x series of LED lighting drivers from Lumissil Microsystems. These components are designed for industrial FXLED applications, offering EMI noise reduction technology and support for a wide range of LED configurations. The series targets applications demanding reliable, space-efficient lighting control solutions.

Replacement Considerations

Direct substitutes require matching the 9-channel output count, 40mA sink capability, and 20-QFN package. Verify I2C compatibility and register mapping if replacing with other manufacturers' parts. No official cross-reference part numbers are documented in the provided source material.