IS31FL3741A-QFLS4-TR

Overview

The IS31FL3741A-QFLS4-TR is a linear constant current LED driver IC manufactured by Lumissil Microsystems. It features nine independent output channels, each capable of delivering up to 38mA. The device operates within a supply voltage range of 2.7V to 5.5V and supports I²C and PWM dimming interfaces with a clock frequency of 1MHz. Packaged in a 60-WFQFN exposed pad (7x7mm) suitable for surface mount installation, it functions reliably across an ambient temperature range of -40°C to +125°C.

Feature Summary

• Integrates nine linear constant current channels for precise LED control without internal switching components.
• Supports dual dimming methods via I²C digital interface and external PWM signals for flexible brightness adjustment.
• Designed for automotive-grade reliability with extended operating temperature capabilities.

Applications

• Automotive interior lighting systems
• Dashboard and instrument cluster illumination
• General-purpose LED matrix displays

Procurement Notes

Verify the specific suffix QFLS4-TR against the manufacturer's latest datasheet to confirm package dimensions and tape-and-reel specifications. Ensure the design accommodates the exposed pad thermal requirements for the 60-WFQFN package. Confirm RoHS compliance status matches project environmental standards before finalizing procurement orders.

Selection Notes

Select this component when a multi-channel linear driver is required for low-noise applications where switching regulators are unsuitable. The 9-channel configuration suits compact matrix layouts. Verify that the system power budget supports the linear topology dissipation at maximum current loads. Check I²C addressability if multiple units share the same bus lines.

Part Context

This part belongs to the IS31FL37xx series of LED lighting drivers from Lumissil Microsystems. These devices are engineered for industrial and automotive FXLED applications, emphasizing EMI noise reduction and wide LED support ranges. The series provides integrated solutions for complex lighting architectures requiring precise current regulation.

Replacement Considerations

Consult official substitution lists for pin-compatible alternatives within the IS31FL37xx family. Verify electrical parameters such as channel count and maximum current ratings match the original design requirements before swapping components.

FAQ

Does the IS31FL3741A contain internal switches?

No, the datasheet specifies that the topology is linear with no internal switches.

What is the maximum output current per channel?

Each of the nine output channels can deliver up to 38mA.