A6271KLPTR-T-1

Overview

The A6271KLPTR-T-1 is an automotive-grade LED boost/buck-boost controller manufactured by Allegro MicroSystems. It operates as a DC-DC controller supporting SEPIC, buck, and boost topologies without internal switches. The device features a fixed switching frequency of 700kHz and accepts analog or PWM dimming inputs. It functions within a supply voltage range of 4.2V to 50V and supports junction temperatures from -40°C to 150°C. Packaged in a 16-eTSSOP with an exposed pad, it holds AEC-Q100 qualification for automotive applications.

Feature Summary

• Supports multiple converter topologies including SEPIC, buck, and boost configurations
• Enables precise LED brightness control through analog and PWM dimming methods
• Designed for high reliability in automotive environments with extended temperature ratings

Applications

• Automotive exterior lighting systems
• Automotive interior illumination circuits
• High-brightness LED backlighting drivers

Procurement Notes

Verify the specific suffix '-1' against official datasheets to confirm pinout and functional equivalence, as ordering suffixes may indicate variations in packaging or revision status. Confirm current design status, as some listings indicate this variant may be obsolete or restricted for new designs. Ensure compatibility with existing PCB footprints and thermal management requirements for the 16-eTSSOP package before finalizing procurement.

Selection Notes

Select this component when designing LED drivers requiring flexible topology support for varying input and output voltage conditions. It is suitable for applications demanding high efficiency and precise dimming control in automotive sectors. Consider the fixed 700kHz frequency when selecting external inductors and capacitors to optimize size and performance. Verify that the absence of internal switches aligns with the system's power stage design requirements.

Part Context

This part belongs to the A6271 series of LED driver controllers from Allegro MicroSystems. It is functionally related to variants such as the A6271KLPTR-T and the discontinued A6267KLPTR-T. These components share similar automotive qualifications and control architectures but may differ in specific electrical parameters or packaging revisions. The series targets robust LED driving solutions for demanding vehicular environments.

Replacement Considerations

The A6271KLPTR-T is listed as a parameter-equivalent alternative. Verify functional compatibility and pinout alignment before substitution. Other family members like the A6267 are noted as obsolete.