A3940KLW-T

Description：IC MOTOR DRIVER 7V-40V 28SOIC
Series：-
Mfr：Allegro MicroSystems
Package：Tube

SKU:c9bd75913522 Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MOTOR DRIVER 7V-40V 28SOIC
Series：-
Mfr：Allegro MicroSystems
Package：Tube
Motor Type - Stepper：-
Motor Type - AC, DC：Brushed DC
Function：Controller - Commutation, Direction Management
Output Configuration：Pre-Driver - Half Bridge (2)
Interface：Parallel
Technology：Power MOSFET
Step Resolution：-
Applications：-
Current - Output：-
Voltage - Supply：7V ~ 40V
Voltage - Load：-
Operating Temperature：-40°C ~ 135°C (TA)
Mounting Type：Surface Mount
Package / Case：28-SOIC (0.295", 7.50mm Width)
Supplier Device Package：28-SOIC
Grade：Automotive
Qualification：-

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A3940KLW-T

Overview

The A3940KLW-T is a full-bridge power MOSFET controller designed for brushed DC motor applications. It integrates commutation logic and direction management within a 28-SOIC package. The device operates on a supply voltage range of 7V to 40V and supports surface mount installation. It features an exposed pad for thermal dissipation and functions as a pre-driver for half-bridge configurations. The component is rated for automotive-grade performance with an operating temperature range from -40°C to 135°C.

Feature Summary

Integrates full-bridge power MOSFET control with internal commutation and direction management logic
Provides pre-driver outputs configured for two half-bridge stages
Supports parallel interface operation for brushed DC motor drives

Applications

Brushed DC motor control systems
Automotive motion control applications
Industrial actuator drive circuits

Procurement Notes

Verify the specific suffix 'T' against manufacturer documentation, as standard listings often indicate tube packaging while 'T' may denote tape-and-reel configuration. Confirm RoHS compliance status, as some variants are non-compliant while others meet ROHS3 standards. Check current production status, as this part number family has been subject to end-of-life notifications and discontinuation notices by Allegro MicroSystems.

Selection Notes

Select this component for applications requiring integrated commutation without external microcontrollers. Ensure the PCB layout accommodates the 28-SOIC footprint with an exposed thermal pad for adequate heat dissipation. Verify that the system voltage remains within the 7V to 40V operational window. Consider alternative packages like TSSOP if pin compatibility differs in the target design.

Part Context

The A3940 series represents Allegro MicroSystems' solution for simplified brushed DC motor driving. This specific model combines gate drive capabilities with logical control functions. It belongs to a family of automotive-grade power ICs designed for reliability in harsh environments. The device eliminates the need for separate driver ICs by integrating necessary bridge control logic.