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A3950ST
AST motor driver chip handles various inductive loads seamlessly
A3950ST
AST motor driver chip handles various inductive loads seamlessly
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A3950ST DataSheet
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Details
The A3950ST is a versatile and robust motor driver IC that is suitable for a wide range of applications, from automotive to industrial. With its wide operating voltage range of 8V to 50V, it can handle demanding motor control systems with ease. The integrated four-channel power DMOS output stage and charge pump provide efficient operation and minimize power dissipation, while the built-in off-time PWM current control ensures smooth and reliable motor control. The A3950ST also includes essential protection features such as overcurrent, overtemperature, and undervoltage lockout to guarantee the safety and reliability of the system. Moreover, its sleep mode function allows for low power consumption when the motor is not in use, further enhancing its energy efficiency. Its small surface-mount package makes it easy to integrate into designs, providing designers with flexibility and convenience
Key Features
- Overcurrent protection with H-bridge
- Undervoltage detection with alarm
- Temperature monitoring and shutdown
- Motor direction control and feedback
Application
- Control printers and scanners
- Automotive power windows
- Home appliances control
- PWM control in automation
- Fan speed and direction
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Manufacturer | ALLEGRO | Product Category ! | IC Chips |
FAQs
What is A3950ST?
The A3950ST is a dual full-bridge PWM motor driver IC designed by Allegro Microsystems. It is commonly used for driving bipolar stepper motors in various applications such as robotics, automation, and 3D printers.
How Does A3950ST Work?
The A3950ST works by receiving control signals from a microcontroller or other control system to drive the connected stepper motor. It provides the necessary power and control signals to precisely move the motor in steps, allowing for accurate positioning and motion control.
How Many Pins does A3950ST have and What are the Functions of the Pinout Configuration?
The A3950ST is housed in a 16-lead SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VBB: Motor supply voltage pin.
- AOUT1A, AOUT2A: Outputs for one phase of the motor winding.
- BOUT1A, BOUT2A: Outputs for the other phase of the motor winding.
- AOUT1B, AOUT2B: Outputs for one phase of the other motor winding.
- BOUT1B, BOUT2B: Outputs for the other phase of the other motor winding.
- PGND: Power ground pin.
- FLG1A, FLG2A, FLG1B, FLG2B: Flag output pins for fault indication.
What are the Pros and Cons of A3950ST?
Pros:
- Full-Bridge Configuration: Allows for precise control of bipolar stepper motors in both directions.
- Integrated Protection Features: Includes thermal shutdown and overcurrent protection for enhanced reliability.
- PWM Control: Enables smooth and quiet operation of stepper motors.
- Compact Package: The 16-lead SOIC package offers a space-efficient solution for motor control applications.
Cons:
- Limited Current Handling: May not be suitable for high-current stepper motor applications.
- External Components: Some applications may require additional external components for optimal performance.
Are There Any Equivalents/Alternatives to A3950ST for Recommendation?
- The DRV8825 from Texas Instruments is a popular alternative motor driver for bipolar stepper motors.
- Alternatives to the A3950ST include the L298N and L6203 H-bridge motor driver ICs from various manufacturers.
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