A6277EA

Overview

The A6277EA is a linear LED driver IC manufactured by Allegro MicroSystems, housed in a 20-DIP package. It features an internal shift register topology with eight independent outputs, each capable of delivering up to 120mA. The device operates within a supply voltage range of 4.5V to 5.5V and supports output voltages up to 4V. Designed for through-hole mounting, it functions at frequencies up to 20MHz and maintains an operating temperature range from -40°C to 85°C.

Feature Summary

• Integrates an 8-channel linear shift register architecture for sequential LED control
• Provides individual channel current regulation with a maximum output of 120mA per channel
• Includes built-in dimming capabilities for adjustable brightness management

Applications

• General purpose LED lighting arrays requiring constant current drive
• Industrial display systems utilizing through-hole component layouts
• Consumer electronics featuring multi-zone LED indicators

Procurement Notes

Verify the specific suffix EA indicates the 20-pin DIP configuration before ordering. Confirm that the RoHS status aligns with project requirements, as this variant may not meet current environmental standards. Ensure the design accommodates the specified thermal dissipation characteristics inherent to linear drivers. Validate that the 5.5V maximum supply voltage matches the system power rail to prevent device damage.

Selection Notes

Select this component when a through-hole solution is mandatory for mechanical stability or legacy board compatibility. The 8-output capacity suits applications needing moderate channel counts without external multiplexing. Consider the linear topology limitations regarding heat dissipation compared to switching alternatives. Verify that the 120mA per channel limit satisfies the total load requirements of the connected LED strings.

Part Context

This part belongs to the A6277 series of LED drivers from Allegro MicroSystems. While other variants like the A6277ELW-T offer surface-mount packaging, the EA suffix specifically denotes the dual in-line package format. This series is designed for reliable operation in environments requiring robust physical connections and straightforward integration into existing through-hole manufacturing processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official manufacturer resources for cross-reference data or evaluate alternative packages within the same product family if pin compatibility is required.