A6277ELW

Overview

The Allegro MicroSystems A6277ELW is an eight-channel linear LED driver IC designed for high-brightness lighting applications. It features a shift register topology with internal switches, delivering up to 120mA per channel. The device operates on a supply voltage range of 4.5V to 5.5V and supports a maximum output voltage of 4V. It utilizes a 20-SOIC surface-mount package and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Eight independent linear output channels controlled via a serial shift register interface
• Integrated internal switches eliminate the need for external pass elements
• Supports PWM dimming capabilities for brightness control

Applications

• Automotive interior illumination systems
• Industrial LED lighting arrays
• Consumer high-brightness LED displays

Procurement Notes

Verify component status as this specific part number is marked as obsolete in distributor records. Confirm RoHS compliance requirements against the specific suffix variant, as some versions are non-compliant. Ensure design-in compatibility with available replacement packages before finalizing procurement plans.

Selection Notes

Select this driver for designs requiring precise current regulation across multiple LEDs without complex switching topologies. The linear architecture simplifies thermal management compared to switching drivers but requires careful consideration of power dissipation. Verify that the 120mA channel current meets the target LED specifications.

Part Context

This component belongs to the A6277 family of LED drivers from Allegro MicroSystems. It serves as a specialized solution for multi-channel lighting control, distinct from single-channel or high-voltage gate driver variants within the manufacturer's broader portfolio.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for active replacements.