A6278ELPTR-T

Overview

The Allegro MicroSystems A6278ELPTR-T is a serial-input constant-current latched LED driver IC designed for display applications. It features an 8-channel NPN sink topology with a linear regulation type, housed in a 16-eTSSOP-EP package. The device operates on a logic supply voltage ranging from 3V to 5.5V, delivering up to 75.5mA per channel. It supports data input rates of 25MHz and includes internal UVLO and thermal shutdown circuitry.

Feature Summary

• Integrates CMOS shift register and data latches for direct microprocessor interfacing
• Provides open LED connection detection signaled via serial data output
• Includes Schmitt trigger inputs to enhance noise immunity

Applications

• LED display systems
• Microprocessor-based lighting control interfaces

Procurement Notes

Verify component authenticity through authorized distributors as the part status is obsolete. Confirm package integrity and RoHS compliance against the latest datasheet revisions. Check for valid replacement options such as the MAX6978AUE+ if current production availability is required for new designs.

Selection Notes

Select this component for low-voltage LED matrix displays requiring serial control. Ensure the design accommodates the 16-pin eTSSOP footprint and thermal requirements. Verify that the host system logic levels match the 3.3V or 5V supply range for reliable data transmission at high speeds.

Part Context

This device belongs to the A6278 family of BiCMOS LED drivers manufactured by Allegro MicroSystems. It shares functional similarities with the A6279 but offers eight channels instead of sixteen. The series is engineered for cost-effective, high-speed serial control of LED arrays in consumer and industrial display environments.

Replacement Considerations

Public confirmed substitute part numbers include MAX6978AUE+ and MAX6970AUE+. These alternatives are listed as upgrades by distributors.