IS31FL3729-TQLS4-TR

Overview

The IS31FL3729-TQLS4-TR is an LED lighting driver IC manufactured by Lumissil Microsystems, designed for matrix LED applications. It features a configurable output structure supporting either 16 channels (n=1-8) or up to 159 LEDs in a matrix configuration. The device integrates PWM control and dot correction capabilities to ensure uniform brightness. It operates within a supply voltage range of 2.7 V to 5.5 V and supports a maximum switching frequency of 1 MHz. The component utilizes a QFN-32 package with dimensions of 4mm x 4mm, suitable for surface mount technology. It includes protection features such as open LED detection and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Integrates PWM dimming and dot correction for precise LED intensity management
• Supports flexible matrix configurations with up to 159 LED addressing capability
• Includes hardware protection mechanisms against open LED faults

Applications

• LED matrix display panels
• Consumer electronics backlighting systems
• Industrial indicator arrays

Procurement Notes

Verify the specific package variant upon ordering, as datasheets indicate both QFN-32 (4mm x 4mm) and eTQFP-32 (7mm x 7mm or 9mm x 9mm) options exist for the IS31FL3729 series. Confirm that the suffix 'TQLS4' corresponds to the exact pinout and thermal pad requirements of your PCB layout. Ensure compatibility with I2C or serial interface signals if programming is required. Check moisture sensitivity levels for reflow soldering profiles.

Selection Notes

Select this component when a high-density LED matrix requires individual channel control without external microcontrollers for basic dimming. The integrated dot correction simplifies calibration processes compared to non-corrected drivers. Consider the 159 LED capacity if space constraints prevent using multiple smaller driver chips. Verify that the 35 mA output current per channel meets the forward current requirements of the selected LED components.

Part Context

This part belongs to the IS31FL3729 family of LED drivers from Lumissil Microsystems. The family focuses on low-power RGB color mixing and general lighting applications. Variants within the series differ primarily by package type (QFN vs. TQFP) and pin count configurations. The TQLS4 designation typically refers to the thin quad flat pack no-lead variant, though cross-referencing with the official datasheet is necessary to distinguish between the 4mm QFN and larger TQFP footprints.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Direct replacements may include other Lumissil models from the IS31FL37xx series, but pin-to-pin compatibility must be verified against the specific package footprint (QFN-32 vs. eTQFP-32). Generic LED matrix drivers with similar I2C interfaces and current ratings may serve as functional alternatives if electrical parameters align.