A3977SEDT
A3977SEDT
Quality Assurance
Quality Assurance
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Shipping & Payment
Shipping & Payment
About Shipping
We generally ship orders within a few business days through reliable shipping carriers such as FedEx, SF, UPS, or DHL. We also have support for other shipping methods. If you would like to inquire about specific shipping details or costs, please don't hesitate to reach out to us.
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
Confirm the return or exchange with our staff.
Maintain the goods in their original condition as received.
Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]
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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A3977SEDT DataSheet
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Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
The A3977 is a complete microstepping motor driver, with builtin translator. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capability of 35 V and ±2.5 A. The A3977 includes a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes. This current-decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.Features and Benefits▪ ±2.5 A, 35 V output rating▪ Low rDS(on) outputs, 0.45 Ω source, 0.36 Ω sink typical▪ Automatic current decay mode detection/selection▪ 3.0 to 5.5 V logic supply voltage range▪ Mixed, fast, and slow current decay modes▪ Home output▪ Synchronous rectification for low power dissipation▪ Internal UVLO and thermal shutdown circuitry▪ Crossover-current protection
![A3977SEDT A3977SEDT](/files/uploads/product/b/1abf20d6-9497-4324-6362-08dbbf1058dd.webp)
Key Features
- ▪ ±2.5 A, 35 V output rating
- ▪ Low rDS(on) outputs, 0.45 Ω source, 0.36 Ω sink typical
- ▪ Automatic current decay mode detection/selection
- ▪ 3.0 to 5.5 V logic supply voltage range
- ▪ Mixed, fast, and slow current decay modes
- ▪ Home output
- ▪ Synchronous rectification for low power dissipation
- ▪ Internal UVLO and thermal shutdown circuitry
- ▪ Crossover-current protection
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Manufacturer | ALEGRO | Product Category ! | Motor Drivers and Controllers |
FAQs
What is A3977SEDT?
The A3977SEDT is a microstepping motor driver integrated circuit designed by Allegro Microsystems. It is specifically designed for driving bipolar stepper motors in various applications, including robotics, automation, and CNC machines.
How Does A3977SEDT Work?
The A3977SEDT works by controlling the current flowing through the windings of a bipolar stepper motor in a microstepping fashion. It incorporates a chopper driver to regulate the current and provide smooth and precise motor movements. The device supports full-step, half-step, quarter-step, and eighth-step microstepping modes for optimal motor control.
How Many Pins does A3977SEDT have and What are the Functions of the Pinout Configuration?
The A3977SEDT is housed in a 24-pin SSOP (Shrink Small Outline Package) package. The pinout configuration includes:
- VREF: Reference voltage output for current sensing.
- 1B, 2B, 3B, 4B: Motor winding output pins.
- VCP, VS, VM: Power supply and motor voltage pins.
- 2A, 1A, 3A, 4A: Motor winding input pins.
- GS2, GS1, GS0: Microstepping mode selection pins.
- DECAY: Decay time control pin.
- ENABLE: Motor driver enable pin.
What are the Pros and Cons of A3977SEDT?
Pros:
- Microstepping Capability: Provides smooth and precise motor control through microstepping modes.
- Integrated Chopper Driver: Regulates current flow for efficient motor operation.
- Flexible Microstepping Modes: Supports multiple microstepping resolutions for customization.
- Thermal Shutdown Protection: Includes thermal shutdown circuitry for overtemperature protection.
- Wide Operating Voltage Range: Works with a wide range of motor and power supply voltages.
Cons:
- Complexity: Requires understanding of motor control concepts for optimal use.
- External Components: May need additional components such as heat sinks or current-sensing resistors for specific applications.
- Package Size: The 24-pin SSOP package may require proper PCB layout and thermal management.
Are There Any Equivalents/Alternatives to A3977SEDT for Recommendation?
- The DRV8825 from Texas Instruments is a comparable microstepping motor driver with similar features.
- Alternatives to the A3977SEDT include the A4988 from Allegro Microsystems and the L298N from STMicroelectronics.
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4,295 In Stock
Cargo cycle: 3~7 Days
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