A3953SB

$1.73

Description：IC MTR DRVR BIPOLAR 3-5.5V 16DIP
Series：-
Mfr：Allegro MicroSystems
Package：Tube

SKU:61b138ad81a2 Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MTR DRVR BIPOLAR 3-5.5V 16DIP
Series：-
Mfr：Allegro MicroSystems
Package：Tube
Motor Type - Stepper：Bipolar
Motor Type - AC, DC：Brushed DC
Function：Driver - Fully Integrated, Control and Power Stage
Output Configuration：Half Bridge (2)
Interface：Parallel
Technology：Bipolar
Step Resolution：-
Applications：General Purpose
Current - Output：1.3A
Voltage - Supply：3V ~ 5.5V
Voltage - Load：3V ~ 50V
Operating Temperature：-20°C ~ 150°C (TJ)
Mounting Type：Through Hole
Package / Case：16-PowerDIP (0.300", 7.62mm)
Supplier Device Package：16-DIP
Grade：-
Qualification：-

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A3953SB

Overview

The Allegro MicroSystems A3953SB is a fully integrated bipolar stepper motor driver IC designed for general-purpose applications. It operates on a single power supply ranging from 3V to 5.5V and supports load voltages up to 50V. The device delivers a continuous output current of 1.3A and features an internal control logic and power stage within a 16-DIP package. It includes protection mechanisms such as thermal shutdown, crossover-current protection, and under-voltage lockout.

Feature Summary

Fully integrated design combining control logic and power stages
Supports full-step, half-step, quarter-step, and eighth-step microstepping modes
Internal PWM current control with selectable fast/slow decay modes
Integrated transient-suppression diodes and thermal shutdown circuitry

Applications

Bipolar stepper motor control in office automation equipment
Actuator drive systems in industrial controls
Valve positioning in HVAC systems

Procurement Notes

Verify the specific suffix 'SB' to confirm the 16-DIP through-hole package variant. Check RoHS compliance status as older batches may differ from current specifications. Confirm availability as this component has been marked as obsolete or end-of-life by the manufacturer. Ensure the application voltage does not exceed the 50V rating.

Selection Notes

Select the A3953SB when a low-voltage (3V-5.5V) bipolar stepper driver is required. Choose this part over the SLB variant if through-hole mounting is necessary. Consider the 1.3A current limit for smaller motors. Verify that the 16-DIP footprint fits the PCB layout constraints compared to surface-mount alternatives.

Part Context

The A3953 belongs to Allegro's family of DMOS bipolar stepper motor drivers. It serves as a complete solution for driving small to medium-sized bipolar stepper motors without requiring external power transistors. The SB suffix specifically denotes the dual in-line package version, distinguishing it from the SOIC (SLB) variants.