A6276ELPTR-T

Overview

The A6276ELPTR-T is a linear LED driver IC manufactured by Allegro MicroSystems, designed for high-brightness LED applications. It features a 16-bit serial input architecture with constant-current latched outputs, providing up to 75.5 mA per channel. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports data input rates up to 20 MHz. Packaged in a 24-SOIC format, it integrates internal switches and includes under-voltage lockout protection. This component is suitable for display and lighting systems requiring precise current regulation and serial control interfacing.

Feature Summary

• Integrates a 16-bit CMOS shift register and data latches for direct microprocessor interfacing
• Provides constant-current sink drivers with user-adjustable output current via a single resistor
• Supports cascade connections through a dedicated CMOS serial data output pin
• Includes functional enable input to disable all output drivers for inter-digit blanking

Applications

• LED display systems requiring serial data control
• High-brightness indicator lighting circuits
• Segmented LED signage applications
• Microprocessor-based lighting control interfaces

Procurement Notes

Verify the exact suffix configuration against the manufacturer's official datasheet to ensure compatibility with specific packaging or temperature grade requirements. Confirm that the 24-SOIC package dimensions align with the target PCB footprint. Check for any recent product change notices regarding lead plating or moisture sensitivity levels prior to finalizing procurement orders.

Selection Notes

Select this component when a fixed linear drive solution is preferred over switching topologies for simpler circuit design. Ensure the application voltage remains within the 4.5 V to 5.5 V range to maintain proper operation. Consider the thermal dissipation capabilities of the SOIC package if driving multiple channels at maximum current ratings simultaneously.

Part Context

This part belongs to the A6276 series of LED drivers from Allegro MicroSystems. It is functionally similar to other variants like the A6276ELW but differs in packaging and reel specifications. The series is characterized by its BiCMOS technology, combining high-speed logic with robust power output stages for reliable LED driving in automotive and industrial environments.

Replacement Considerations

The A6275EA and A6275ELW are noted as similar 8-bit devices within the same family. For direct replacement, verify pin-out compatibility and current rating differences between the 16-channel A6276 and alternative 8-bit drivers.