A6276ELWTR

Overview

The Allegro A6276ELWTR is a linear LED driver IC featuring 16 constant-current sink outputs. It integrates a 16-bit serial input shift register and data latches for direct microprocessor interfacing. The device operates on a supply voltage range of 4.5V to 5.5V, with individual output voltages up to 4V. Each channel provides a typical output current of 75.5mA, controlled by an external resistor. It supports PWM dimming frequencies up to 20MHz and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a 16-bit CMOS shift register and data latches for simplified serial control interfaces.
• Provides 16 independent constant-current sink drivers for uniform LED brightness regulation.
• Includes under-voltage lockout protection to ensure stable operation during power fluctuations.

Applications

• LED display systems requiring serial data input
• Automotive interior lighting modules
• Industrial indicator panels

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature grade. Ensure the component matches the required automotive qualification standards if used in vehicle applications. Cross-reference pinouts carefully as variations exist within the family. Confirm RoHS compliance status for regulatory adherence. Validate that the 24-SOIC footprint aligns with the target PCB design constraints.

Selection Notes

Select this component when a high-density solution for driving multiple LEDs via a serial interface is required. It is suitable for designs needing precise current matching across channels without complex external circuitry. Consider the thermal dissipation capabilities of the SOIC package for the intended load. Evaluate the 20MHz data rate requirement against the system's processing speed. Ensure the 5V logic compatibility matches the host controller's output levels.

Part Context

This part belongs to the A6276 series of constant-current latch drivers designed primarily for LED display applications. It serves as a functional replacement for legacy components like the TB62706BN/BF. The series offers identical electrical options across different package styles, allowing flexibility in mechanical design while maintaining consistent performance characteristics for segment or matrix displays.

Replacement Considerations

The A6275EA and A6275ELW are similar devices offering 8-bit functionality. Verify that the reduced channel count meets the application requirements before substitution. Check for any differences in package dimensions or thermal characteristics between the 16-bit and 8-bit variants.