A3955SB

Name: A3955SB
Brand: Allegro MicroSystems
Rating: 4.5 (10 reviews)
Author: Lisleapex

DIP-16 design in plastic package for bipolar stepper motor controller applications

6,853 Effective Inventory

A3955SB

Effective Inventory6,853

DIP-16 design in plastic package for bipolar stepper motor controller applications

Manufacturer Part # : A3955SB
Package/Case: PDIP Bat
Brand: Allegro MicroSystems
Product Categories : Motor Drivers, Controllers
Series : A3955

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We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.

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About After Sales Service

All Parts Extended Quality Guarantee

Initiate the application within 90 days from the shipment date.

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Maintain the goods in their original condition as received.

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About packaging

Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.

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A3955SB DataSheet

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

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A3955SB Details

The A3955SB is a motor driver IC designed for bidirectional control of DC motors, offering a wide range of supply voltages up to 50V and delivering up to 20A continuous current. This device incorporates protection features like thermal shutdown and overcurrent detection, providing direction and PWM speed control.

Key Features

Bidirectional Motor Control: Designed for bidirectional control of DC motors.
Wide Supply Voltage Range: Supports a wide range of supply voltages up to 50V.
High Current Capability: Delivers up to 20A continuous current.
Protection Features: Incorporates thermal shutdown and overcurrent detection for reliable operation.
PWM Speed Control: Offers direction and PWM speed control for precise motor control.

Applications

High-Current Motor Driver: Suitable for applications requiring high current capabilities.
Industrial Automation Ready: Ideal for industrial automation systems where robust motor control is necessary.
Precise Speed Regulation: Used in applications requiring precise speed regulation and control.
Durable Brushed Motor Control: Suitable for applications involving durable brushed motor control.

Where to Use

The A3955SB is suitable for use in various industrial and commercial applications, including:

- Industrial automation systems

- Robotics

- Electric vehicles

- Aerospace

How to Use

To use the A3955SB, follow these steps:

1. Connect the device to your power supply.

2. Connect the motor leads to the A and B pins.

3. Configure the direction and PWM speed control using the RO, RE, DE, and DI pins.

(Tip: For detailed usage instructions, refer to the datasheet.)

Application Circuit

The application circuit diagram for the A3955SB illustrates how to connect the device to a motor and power supply. Please consult the datasheet for specific connections and guidelines.

Equivalents

L6384H: A similar motor driver IC from STMicroelectronics offering comparable features and performance.

Complementary

The A3955SB can be complemented by the L6206, which offers higher current handling and additional protection features for more demanding applications.

Frequently Asked Questions

Q: What is the maximum supply voltage supported by the A3955SB?

A: The A3955SB supports a wide range of supply voltages up to 50V. For more details, refer to the datasheet for specific operating conditions and limitations.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Name	A3955SB	Product Type !	Motor Driver IC
Manufacturer	Allegro Microsystems	Motor Type	Stepper Motor or DC Motor
Number of Motor Outputs	2	Supply Voltage	5V to 50V
Package Type	Surface-Mount SOIC-16	Operating Temperature Range !	-40°C to 85°C

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification A3955SB PDF Download

FAQs

What is A3955SB?

The A3955SB is a full-bridge PWM motor driver integrated circuit designed by Allegro Microsystems. It is commonly used in applications requiring precise control of bidirectional DC motors or actuators, such as robotics, automotive systems, and industrial automation.

How Does A3955SB Work?

The A3955SB operates by controlling the speed and direction of a DC motor through pulse-width modulation (PWM) techniques. It incorporates a full-bridge power stage to drive the motor in both forward and reverse directions with adjustable speed. The driver offers built-in protection features like thermal shutdown and overcurrent protection for safe motor operation.

How Many Pins does A3955SB have and What are the Functions of the Pinout Configuration?

The A3955SB is housed in a 16-lead SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

VBB: Bootstrap capacitor supply voltage pin.
VCC: Logic power supply pin.
OUT 1A, OUT 1B: Motor output pins for phase A.
OUT 2A, OUT 2B: Motor output pins for phase B.
IN 1, IN 2: Input pins for control signals.
VREF, RC: Reference voltage and resistor-capacitor timing components.
VCP, CP1, CP2: Charge pump and charge pump capacitors.

What are the Pros and Cons of A3955SB?

Pros:

Full-Bridge Configuration: Provides bidirectional control capability for DC motors.
Precision Control: Offers PWM speed control and direction control for accurate motor operation.
Built-in Protections: Includes thermal shutdown and overcurrent protection for motor safety.
Compact Design: Housed in a 16-lead SOIC package for space-efficient integration into systems.
Suitable for Various Applications: Widely used in robotics, automotive, and industrial automation fields.

Cons:

External Components: May require external components for power regulation and motor feedback in some applications.
Complex Configuration: Some users may find the full-bridge control setup initially challenging to implement.
Heat Dissipation: High current handling may require heat sinking for thermal management in demanding applications.

Are There Any Equivalents/Alternatives to A3955SB for Recommendation?

The L298N from STMicroelectronics is a commonly used alternative motor driver with similar functionality.
Alternatives to the A3955SB include the TB6612FNG from Toshiba and the DRV8833 from Texas Instruments.