IS31FL3726-QFLS2-TR

Overview

The IS31FL3726-QFLS2-TR is a 16-channel linear LED driver IC manufactured by Lumissil Microsystems. It features PWM dimming control and operates within a supply voltage range of 3.3V to 5.5V. The device provides an output current of 60mA per channel and supports a switching frequency of 20MHz. It is housed in a 24-VFQFN package with exposed pad, measuring 4x4mm. The component functions as a shift register topology driver with internal switches, suitable for backlight applications across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates 16 independent constant current channels for precise LED control
• Supports pulse-width modulation (PWM) dimming for brightness adjustment
• Utilizes shift register topology for simplified serial data input
• Includes internal power switches to reduce external component count

Applications

• LED backlighting systems
• Portable electronic displays
• Consumer electronics lighting modules

Procurement Notes

Verify component status carefully as the IS31FL3726-QFLS2-TR is officially listed as obsolete or end-of-life by the manufacturer. Confirm availability through authorized distributors only, noting that stock may be limited or exhausted. Ensure design-in decisions account for potential supply chain discontinuation and consider long-term support requirements before finalizing procurement plans.

Selection Notes

Select this component for designs requiring a compact 16-channel solution with integrated shift register functionality. The linear topology suits low-voltage applications operating between 3.3V and 5.5V. Engineers should evaluate the 60mA output capability against specific LED forward current requirements. The QFN-24 package offers thermal advantages but requires appropriate PCB layout considerations for the exposed pad.

Part Context

This part belongs to the IS31FL3726 series of LED drivers from Lumissil Microsystems. It is designed for high-density LED arrays where space efficiency is critical. The series typically targets portable devices and display backlights, offering a balance of performance and integration. The specific suffix indicates the tape and reel packaging format and pin configuration variant.

Replacement Considerations

The IS31FL3726A-QFLS4-TR is identified as a manufacturer-recommended replacement. Verify pin compatibility and electrical specifications before substitution. Note that the A-series variant may have updated features or packaging differences requiring schematic and layout review.