IS31FL3246-TQLS4-TR

Overview

The IS31FL3246-TQLS4-TR is a 36-channel LED driver IC manufactured by Lumissil Microsystems. It features linear constant current outputs with PWM dimming capability, delivering an output current of 25.3 mA per channel. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports adjustable output voltages. Designed for high-performance lighting applications, it utilizes a 48-pin eTQFP package measuring 9.0 mm x 9.0 mm. The component functions across a wide temperature range from -40°C to +125°C, ensuring reliability in demanding environments.

Feature Summary

• Provides 36 independent constant current channels for precise LED control
• Integrates PWM dimming functionality for smooth brightness adjustment
• Supports wide input voltage ranges for flexible power supply designs

Applications

• General LED lighting systems requiring multi-channel control
• Automotive interior and exterior illumination modules
• Industrial display backlighting arrays

Procurement Notes

Verify the specific suffix TQLS4 to confirm the eTQFP-48 package variant, as other suffixes indicate different form factors like QFN. Ensure compatibility with the required 9.0mm x 9.0mm footprint during PCB layout. Confirm that the 25.3mA output current aligns with the target LED specifications. Check for any recent Product Change Notifications regarding manufacturing updates or material substitutions before finalizing procurement orders.

Selection Notes

Select this component when a high channel count is necessary within a compact surface-mount package. The eTQFP-48 format offers distinct advantages over QFN variants if leaded connections are preferred for thermal dissipation or mechanical stability. Consider the 25.3mA fixed current limit; if higher current per channel is required, alternative drivers in the series must be evaluated. This part is suitable for designs prioritizing integrated PWM control without external microcontroller complexity for each channel.

Part Context

This model belongs to the IS31FL3246 family of LED lighting drivers, which provides industrial-grade solutions for complex LED matrices. While the base IS31FL3246-QFLS4-TR utilizes a QFN-44 package, the TQLS4 suffix specifically denotes the eTQFP-48 configuration. This variation maintains identical electrical performance and channel architecture but differs in physical dimensions and pinout geometry, catering to diverse board space constraints.

Replacement Considerations

Direct substitutes include the IS31FL3246-QFLS4-TR, provided the PCB design accommodates the smaller QFN-44 package instead of the eTQFP-48. Other models in the IS31FL3x series may offer similar channel counts but often differ in current ratings or package types. Verify pin-to-pin compatibility and thermal characteristics before swapping between package variants.