A6275EA

Overview

The A6275EA is a linear LED driver IC manufactured by Allegro MicroSystems, designed for driving multiple LEDs with constant current. It features an internal shift register topology and provides eight independent output channels. The device operates within a supply voltage range of 4.5V to 5.5V, delivering up to 75.5mA per channel with a maximum output voltage of 4V. It supports PWM dimming at frequencies up to 20MHz and functions reliably in temperatures from -20°C to 85°C. Packaged in a 16-DIP format, it integrates internal switches for direct LED control.

Feature Summary

• Integrates an 8-channel linear driver with internal shift register for serial data input
• Supports high-frequency PWM dimming for precise brightness control
• Provides constant current regulation for stable LED performance
• Includes internal switching elements to simplify circuit design

Applications

• LED indicator arrays
• Low-power LED lighting modules
• Display backlighting systems
• General purpose LED control circuits

Procurement Notes

Verify component authenticity through authorized distributors or the manufacturer directly. Confirm RoHS compliance status as records indicate non-compliance. Check for obsolescence notices since the part is marked as discontinued. Ensure the 16-DIP package matches your PCB footprint requirements. Validate temperature ratings against your specific operating environment constraints before finalizing procurement.

Selection Notes

Select this component when a multi-channel linear LED driver with shift register interface is required. It is suitable for applications needing up to eight independently controlled outputs. Consider the 16-DIP package if through-hole mounting is preferred over surface mount alternatives. Evaluate the 75.5mA current limit against your LED forward current requirements. Ensure the 5.5V maximum supply voltage aligns with your system power rails.

Part Context

The A6275EA belongs to the A6275 series of LED drivers from Allegro MicroSystems. This series focuses on linear regulation for cost-effective LED control solutions. The EA suffix typically denotes a specific package variant, in this case, the 16-DIP configuration. It shares core functionality with other variants like the SLW (SOIC) but differs in physical mounting style. The series is designed for simple serial interface control using standard logic levels.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The A6275SA is listed as a discontinued variant within the same family, offering identical electrical specifications but potentially different packaging or revision details. Verify pin compatibility and thermal characteristics if considering any legacy variants from the A6275 series.