IS31FL3239-QFLS4-TR

Overview

The IS31FL3239-QFLS4-TR is a linear constant current LED driver IC manufactured by Lumissil Microsystems. It features 24 independent output channels housed in a 32-QFN (4x4) package. The device supports a maximum output current of 38mA per channel, adjustable via an 8-bit global control register. It operates without dimming functionality and requires a supply voltage between 2.7V and 5.5V.

Feature Summary

• Provides 24 independent constant current output channels for LED driving applications
• Features adjustable output current controlled by a single 8-bit global register
• Utilizes a compact 32-pin QFN package with a 4mm x 4mm footprint

Applications

• High-density LED matrix displays
• LED backlighting systems requiring multiple uniform channels
• General-purpose LED indicator arrays

Procurement Notes

Verify the specific suffix QFLS4 to confirm the package type and tape-and-reel configuration. Ensure compatibility with the target PCB footprint for the 32-QFN (4x4) housing. Confirm that the application does not require PWM or analog dimming, as this model lacks such features. Check operating temperature ranges against environmental requirements.

Selection Notes

Select this component when a high channel count is required within a small form factor. It is suitable for designs needing fixed current levels adjustable globally rather than individually per channel. Consider alternative models if precise per-channel current trimming or dimming capabilities are necessary for the specific application.

Part Context

This part belongs to the IS31FL32xx series of LED drivers from Lumissil Microsystems. It shares the manufacturer's focus on multi-channel solutions but differs from variants like the IS31FL3209 which offers fewer outputs and I2C control. The IS31FL3239 specifically targets applications prioritizing channel density over complex communication interfaces.

Replacement Considerations

Direct substitutes include other 24-channel linear LED drivers from Lumissil. Cross-reference pinouts carefully when considering competitors, as QFN pin assignments vary significantly between manufacturers.