IS31FL3258-QFLS4-TR

Overview

The IS31FL3258-QFLS4-TR is an 18-channel LED lighting driver IC manufactured by Lumissil Microsystems. It features a constant current topology with an output current of 27.5 mA per channel. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports PWM dimming. It utilizes an I2C interface for control and functions at a working frequency of 32 MHz. The component is housed in a QFN-28 package measuring 4 mm x 4 mm, suitable for surface mount installation, and operates between -40°C and +125°C.

Feature Summary

• Provides 18 independent constant current outputs for precise LED control
• Integrates I2C communication interface for simplified system connectivity
• Supports PWM dimming functionality for brightness adjustment
• Designed for wide operating temperature ranges in demanding environments

Applications

• Automotive interior and exterior lighting systems
• Industrial indicator panels and signaling devices
• Consumer IoT lighting fixtures and smart home appliances

Procurement Notes

Verify the specific suffix QFLS4 against the manufacturer's latest datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure compatibility with the I2C bus speed and voltage levels used in your target application. Check for any recent Product Change Notifications (PCN) regarding material or process updates that may affect long-term availability or performance specifications.

Selection Notes

Select this component when an 18-channel solution is required for high-density LED arrays. The QFN-28 package offers a compact footprint suitable for space-constrained designs. Consider the 27.5 mA output current capability to ensure it meets the forward current requirements of the connected LEDs without external amplification. Verify thermal management needs given the operating temperature range and power dissipation in the specified package.

Part Context

This part belongs to the IS31FL3x series of LED lighting drivers from Lumissil Microsystems, which are optimized for automotive and industrial applications. The series emphasizes EMI noise reduction and wide input voltage support. The IS31FL3258 specifically targets applications requiring multiple channels with digital control interfaces, distinguishing it from simpler analog drivers or lower-channel-count variants in the product line.

Replacement Considerations

Direct substitutes include other 18-channel LED drivers from Lumissil such as the IS31FL3238-QFLS4-TR, provided the interface and current specifications align. Cross-referencing with similar offerings from other manufacturers requires careful verification of pin compatibility, I2C addressing, and thermal performance metrics.