IS31FL3237-QFLS4-TR

Overview

The IS31FL3237-QFLS4-TR is a linear LED driver IC featuring 36 constant current output channels. It supports I2C control for dimming and configuration. The device operates on a supply voltage range of 2.7 V to 5.5 V, with a maximum power supply current of 8 mA. Each channel delivers an output current of 38 mA. The component utilizes Boost and Buck topologies and includes adjustable output voltage capabilities. It functions within a temperature range of -40°C to +125°C and operates at a frequency of 1 MHz. The part is housed in a QFN-44 package measuring 5.0mm x 5.0mm.

Feature Summary

• Provides 36 independent constant current channels for precise LED control
• Supports pulse width modulation (PWM) dimming via I2C interface
• Integrates Boost and Buck switching topologies for flexible power management

Applications

• LED lighting driver systems
• Color LED display modules
• General-purpose LED illumination circuits

Procurement Notes

Verify the specific suffix QFLS4 against the manufacturer's official datasheet to confirm pinout and electrical specifications match the design requirements. Ensure compliance with RoHS standards as indicated in product documentation. Confirm moisture sensitivity level handling procedures during assembly to prevent damage. Cross-reference the QFN-44 footprint dimensions with PCB layout guidelines provided by Lumissil Microsystems.

Selection Notes

Select this component when designing systems requiring high channel density for LED arrays. The integrated I2C interface simplifies control logic compared to parallel drive solutions. Consider the 38 mA per channel limit when sizing thermal dissipation for the QFN-44 package. The wide operating temperature range suits industrial applications. Verify that the input voltage range aligns with the system power supply architecture.

Part Context

This part belongs to the IS31FL3x series of LED lighting drivers from Lumissil Microsystems. These components are designed for industrial applications supporting a wide range of LED counts. The series emphasizes EMI noise reduction technology. The IS31FL3237 variant specifically targets applications needing multiple constant current outputs within a compact surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.