IS31FL3737B-QFLS4-TR

Overview

The IS31FL3737B-QFLS4-TR is a 12x12 dots matrix LED driver manufactured by Lumissil Microsystems. It operates within a supply voltage range of 2.7V to 5.5V and supports I²C and PWM dimming protocols at a frequency of 1MHz. The device provides 12 outputs with a channel current of 42mA. It is housed in a 40-WFQFN package (5mm x 5mm) with an exposed pad, designed for surface mount installation. The component functions as a linear driver without internal switches and is rated for an operating temperature range of -40°C to +125°C.

Feature Summary

• Supports 12x12 dot matrix configurations with general-purpose operation capabilities
• Enables precise brightness control through integrated I²C and PWM dimming interfaces
• Operates reliably across extended industrial temperature ranges up to 125°C

Applications

• General-purpose LED matrix displays
• Industrial indicator panels
• Consumer electronic status displays

Procurement Notes

Verify the specific suffix QFLS4-TR against official Lumissil documentation to confirm the tape and reel packaging configuration and moisture sensitivity level. Ensure the ordering quantity aligns with the manufacturer's standard factory pack requirements. Confirm that the 40-QFN pinout matches the target PCB footprint design before finalizing procurement decisions.

Selection Notes

Select this component when a compact solution for driving 144 LEDs in a 12x12 grid is required. It is suitable for designs needing independent channel control via I²C or PWM without complex external switching circuitry. Consider the 42mA output capability and 5.5V maximum supply voltage when designing power delivery networks for the LED array.

Part Context

This part belongs to the IS31FL37xx series of LED lighting drivers from Lumissil Microsystems. These devices are engineered for applications requiring efficient matrix scanning and low component count. The series typically integrates constant current sources and communication interfaces to simplify system architecture for display and signaling purposes.

Replacement Considerations

Check Lumissil datasheets for cross-reference compatibility with other models in the IS31FL37xx family. Verify pin-to-pin compatibility and electrical parameter alignment before substituting with alternative part numbers.

FAQ

What is the maximum supply voltage for the IS31FL3737B?

The maximum supply voltage is 5.5V.

Does the IS31FL3737B have internal switches?

No, it is a linear driver type without internal switches.