IS31FL3298-QFLS4-TR

Overview

The IS31FL3298-QFLS4-TR is a linear LED driver IC manufactured by Lumissil Microsystems, designed for multi-channel LED applications. It features nine independent output channels capable of delivering up to 20mA per channel. The device integrates a switched capacitor DC-DC regulator, functioning as a charge pump, to efficiently drive LEDs with varying forward voltage requirements. Control and dimming are managed via I2C interface and PWM signals. The component operates within a supply voltage range of 2.7V to 5.5V and is housed in a compact 24-QFN (4x4mm) package with an exposed pad for thermal dissipation.

Feature Summary

• Integrates a switched capacitor DC-DC charge pump for efficient LED driving across different voltage drops
• Provides nine individually controllable output channels with linear current regulation
• Supports digital control and dimming through standard I2C communication interfaces
• Operates reliably across a wide industrial temperature range from -40°C to 125°C

Applications

• Multi-zone LED backlighting systems
• Status indicator arrays in consumer electronics
• LED matrix displays requiring individual channel control
• Portable devices with limited power supply headroom

Procurement Notes

Verify the specific suffix QFLS4 against the manufacturer's latest datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the 24-QFN package dimensions align with your PCB footprint. Confirm RoHS compliance status if required by your regional regulations. Check for any recent Product Change Notifications (PCN) that may affect material composition or manufacturing location before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring multiple LED channels driven from a single low-voltage source. The integrated charge pump allows driving high-forward-voltage LEDs without external boost converters. Compare channel count and current limits against other IS31FL series parts if more or fewer outputs are needed. Verify I2C addressability and dimming resolution requirements against system constraints.

Part Context

This part belongs to the IS31FL32xx series of LED lighting drivers from Lumissil Microsystems. These drivers are optimized for general-purpose LED illumination tasks where precise current control and minimal external component count are prioritized. The series typically offers various channel counts and packaging options to suit different form factors and application densities.

Replacement Considerations

Direct substitutes include other IS31FL32xx variants with similar channel counts and charge pump integration, such as the IS31FL3209, provided the output current and package compatibility are verified. Cross-referencing with Lumissil's official replacement guide is recommended to ensure functional equivalence.