A3938SLQ

$3.72

Description：IC MOTOR DRIVER 18V-50V 36QSOP
Series：-
Mfr：Allegro MicroSystems
Package：Tube

SKU:793b60d77f14 Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MOTOR DRIVER 18V-50V 36QSOP
Series：-
Mfr：Allegro MicroSystems
Package：Tube
Motor Type - Stepper：-
Motor Type - AC, DC：Brushless DC (BLDC)
Function：Controller - Commutation, Direction Management
Output Configuration：Pre-Driver - Half Bridge (3)
Interface：Parallel, PWM
Technology：Power MOSFET
Step Resolution：-
Applications：General Purpose
Current - Output：-
Voltage - Supply：18V ~ 50V
Voltage - Load：-
Operating Temperature：-20°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：36-BSOP (0.295", 7.50mm Width)
Supplier Device Package：36-QSOP
Grade：-
Qualification：-

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A3938SLQ

Overview

The A3938SLQ is a three-phase brushless DC (BLDC) motor pre-driver manufactured by Allegro MicroSystems. It provides direct, high-current gate drive for an all N-channel power MOSFET three-phase bridge circuit. The device integrates three Hall-element inputs for commutation control, a sequencer, fixed off-time PWM current control, and locked-rotor detection. It operates within a supply voltage range of 18V to 50V and supports an ambient operating temperature from -20°C to +85°C. The component is housed in a 36-QSOP package with 36 pins.

Feature Summary

Integrates three Hall-element inputs for precise commutation timing control
Provides direct high-current gate drive for external N-channel MOSFETs
Includes internal thermal shutdown with hysteresis and undervoltage lockout protection

Applications

Three-phase brushless DC motor systems
Industrial automation equipment requiring BLDC control
General-purpose motor driver applications

Procurement Notes

Verify the specific suffix SLQ against official datasheets to confirm the 36-QSOP package configuration. Confirm RoHS compliance status as distributor records may vary or indicate non-compliance for this specific variant. Check for obsolescence notices or product change notifications regarding packaging or sourcing before finalizing procurement plans.

Selection Notes

Select this component when designing circuits that require integrated Hall sensor inputs and direct MOSFET gate driving for three-phase BLDC motors. Ensure the application voltage remains within the 18V to 50V range. Verify that the 36-QSOP package dimensions fit the board layout constraints and that the thermal performance meets the system requirements for the specified operating temperature range.

Part Context

The A3938 series serves as a comprehensive pre-driver solution for three-phase BLDC motors. Variants such as the A3938SLDTR-T offer alternative packaging options like the 38-TSSOP. The family focuses on simplifying motor control design by integrating sequencing, current regulation, and protection features, reducing the need for external discrete logic components.