A6281EESTR-T

Overview

The A6281EESTR-T is a 3-channel constant current LED driver in a lead-free QFN-16 package (HVQCCN, LCC16,.12SQ,20). It operates from 5 to 17 V with an output current range of 10 to 150 mA per channel. Features include 3x 10-bit PWM brightness settings and 3x 7-bit dot correction. The serial port supports up to 5 MHz. Operating temperature is -40 °C to 85 °C.

Feature Summary

• Provides three channels of constant current drive for LED applications
• Enables high-fidelity color mixing via programmable PWM control
• Supports cascaded connections for large-scale display systems

Applications

• RGB LED clusters requiring precise color mixing
• High-density LED displays
• Automotive interior lighting modules

Procurement Notes

Verify the component matches the specific Allegro MicroSystems datasheet specifications before integration. Confirm that the QFN-16 package dimensions align with the PCB footprint design. Ensure the supply voltage remains within the 5 to 17 V operational range to maintain proper functionality and avoid damage to the internal circuitry.

Selection Notes

Select this part when a compact solution for multi-color LED driving is required. It is suitable for designs needing independent current control and high-resolution dimming. Consider the thermal performance of the QFN package and the need for external current-setting resistors when finalizing the schematic.

Part Context

This device belongs to the A6281 series of linear shift register LED drivers. It is designed for applications requiring serial data input and buffered logic outputs. The component integrates protection features such as thermal shutdown and UVLO to ensure reliability in various operating environments.

Replacement Considerations

Check for direct substitutes like the A6280 if fewer channels are acceptable. Verify pin compatibility and electrical parameters against the original specification sheet before swapping components in existing hardware designs.

FAQ

How is the maximum output current determined?

The maximum current is set by an external resistor connected to the device.

What is the maximum speed of the serial interface?

The serial port operates at speeds up to 5 MHz.