A3940KLPTR

Description：IC MOTOR DRIVER 7V-40V 28TSSOP
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR)

SKU:b485fd9f8e4d Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MOTOR DRIVER 7V-40V 28TSSOP
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR)
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-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package：28-TSSOP-EP
Grade：Automotive
Qualification：-

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A3940KLPTR

Overview

The A3940KLPTR is a discontinued full-bridge power MOSFET controller manufactured by Allegro MicroSystems. Designed for automotive applications, it supports brushed DC motors with a supply voltage range of 7V to 40V. The device operates within an ambient temperature range of -40°C to 135°C and utilizes a 28-TSSOP-EP surface-mount package. It functions as a parallel interface controller providing commutation and direction management capabilities.

Feature Summary

Integrated full-bridge power MOSFET controller architecture
Automotive-grade reliability certification
Supports commutation and direction management functions

Applications

Brushed DC motor control in automotive systems
Direction management circuits
Commutation control interfaces

Procurement Notes

This component has reached end-of-life status and is no longer in production. Verification of current availability requires checking authorized distributors for remaining stock or obsolete inventory. Buyers must confirm the specific revision level and RoHS compliance status, as documentation indicates variations between non-compliant and RoHS3 compliant versions for similar part numbers. Due to discontinuation, lead times are unpredictable and sourcing should be approached with caution regarding authenticity and storage history.

Selection Notes

Designers requiring this functionality should evaluate the A3941KLPTR-T as a documented substitute. The replacement offers similar full-bridge control capabilities while addressing the obsolescence of the A3940 series. Engineers must verify pin compatibility and thermal performance requirements when transitioning from the 28-TSSOP-EP package to ensure seamless integration into existing board layouts without redesigning the mechanical footprint.

Part Context

The A3940 series represents Allegro MicroSystems' legacy solutions for brushed DC motor applications. This specific variant belongs to the automotive-grade product line, emphasizing robustness under harsh environmental conditions. The TSSOP-EP package provides enhanced thermal dissipation through an exposed pad, suitable for high-current motor driving applications where heat management is critical for sustained operation.