IS32FL3746B-TQLA3-TR

Overview

The IS32FL3746B-TQLA3-TR is an LED driver IC manufactured by Lumissil Microsystems, designed for matrix display applications. It features 18 output channels arranged in a 4x18 configuration, supporting both linear constant current regulation and PWM dimming capabilities with a channel current of 34.5mA. The device integrates 8-bit PWM and 8-bit DC control for precise brightness adjustment. It is housed in a 32-pin eTQFP package (7x7mm) with exposed pads for thermal management. This component is suitable for automotive intelligent signaling and general LED matrix displays requiring high reliability and efficient heat dissipation.

Feature Summary

• Integrates 18 output channels configured as a 4x18 matrix for driving LED arrays
• Supports linear constant current regulation with independent PWM dimming control
• Features 8-bit PWM and 8-bit DC resolution for precise brightness and color mixing
• Utilizes a 32-pin eTQFP package with exposed thermal pad for enhanced heat dissipation

Applications

• Automotive intelligent signaling displays
• LED matrix dot matrix displays
• General purpose LED lighting control systems

Procurement Notes

Verify the specific suffix TQLA3 to confirm the tape and reel packaging format and pin configuration. Ensure compatibility with the target PCB footprint for the 32-eTQFP package. Confirm that the 34.5mA per channel current rating meets the requirements of the connected LED components. Check for RoHS compliance status if required by the end product specifications.

Selection Notes

Select this component when a compact solution for driving 18 LEDs with individual PWM control is required. The exposed pad design makes it suitable for applications where thermal performance is critical. Consider the 32-pin package size relative to available board space. Verify that the supply voltage range supports the intended LED forward voltage drops in the series/parallel configuration.

Part Context

This part belongs to the Lumissil IS32FL series of LED drivers, which are optimized for automotive and industrial display applications. The series focuses on providing reliable constant current regulation with integrated dimming controls. The IS32FL3746B variant specifically targets matrix configurations, offering a balance between channel count and package density for mid-sized display panels.

Replacement Considerations

Check for direct substitutes within the IS32FL series that offer similar channel counts and package types. Verify electrical parameters such as maximum current per channel and operating temperature range before substitution. Ensure that any replacement part maintains the same interface and control logic compatibility.