A6278ELWTR-T

$1.47

Description：IC LED DRVR LINEAR 75.5MA 16SOIC
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:390af2dcc195 Category: LED Drivers IC Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC LED DRVR LINEAR 75.5MA 16SOIC
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Linear
Topology：Shift Register
Internal Switch(s)：Yes
Number of Outputs：8
Voltage - Supply (Min)：3V
Voltage - Supply (Max)：5.5V
Voltage - Output：-
Current - Output / Channel：75.5mA
Frequency：25MHz
Dimming：-
Applications：-
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：16-SOIC (0.295", 7.50mm Width)
Supplier Device Package：16-SOIC
Grade：-
Qualification：-

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A6278ELWTR-T

Overview

The A6278ELWTR-T is an Allegro Microsystems linear LED driver IC featuring eight outputs and a shift register topology. It operates on a 3V to 5.5V supply with a maximum output current of 75.5mA per channel. The device supports PWM dimming at frequencies up to 25MHz and functions within a -40°C to +85°C temperature range. Packaged in a 16-SOIC surface-mount format, it integrates internal switches for direct LED control.

Feature Summary

Integrates an 8-channel linear driver with serial shift register interface for simplified control
Supports high-frequency PWM dimming for precise brightness adjustment
Includes thermal shutdown protection to safeguard the component during overheating

Applications

General lighting applications requiring multi-channel LED control
Industrial display backlighting systems
Consumer electronics with integrated LED indicators

Procurement Notes

This specific part number is officially marked as obsolete by the manufacturer. Verification of end-of-life status is required before integration into new designs. Engineers must confirm availability through authorized distributors or identify approved replacement components that match the electrical specifications and pinout requirements.

Selection Notes

Designers should evaluate the linear topology limitations regarding power dissipation compared to switching alternatives. The 75.5mA output limit defines the maximum drive capability per channel. Ensure the PCB layout accommodates the thermal requirements of the SOIC package to maintain reliable operation within the specified ambient temperature range.

Part Context

The A6278 belongs to Allegro's dedicated LED driver family designed for constant current regulation. It utilizes a shift register architecture to manage multiple channels efficiently. This series targets applications needing scalable LED control without complex external circuitry.