A3979SLPT
IC MTR DRV BIPOLR 3-5.5V 28TSSOP
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服務與包裝
服務與包裝
About After Sales Service
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例子
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A3979SLPT 數據表
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目前的價格方案正在編制中。請聯絡我們的客戶服務團隊獲取最新的價格資訊。感謝您的理解和支援!
詳細說明
Designed for pulse-width modulated (PWM) current control of bipolar microstepping stepper motors, the A3972 is capable of continuous output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.Features and Benefits ▪ ±1.5 A, 50 V Continuous Output Rating ▪ Low RDS(on) DMOS Output Drivers ▪ Optimized Microstepping via 6-Bit Linear DACs ▪ Programmable Mixed, Fast, and Slow Current-Decay Modes ▪ 4 MHz Internal Oscillator for Digital Timing ▪ Serial-Interface Controls Chip Functions ▪ Synchronous Rectification for Low Power Dissipation ▪ Internal UVLO and Thermal Shutdown Circuitry ▪ Crossover-Current Protection ▪ Precision 2 V Reference ▪ Inputs Compatible with 3.3 or 5 V Control Signals ▪ Sleep and Idle Modes
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主要特徵
- ▪ ±1.5 A, 50 V Continuous Output Rating
- ▪ Low RDS(on) DMOS Output Drivers
- ▪ Optimized Microstepping via 6-Bit Linear DACs
- ▪ Programmable Mixed, Fast, and Slow Current-Decay Modes
- ▪ 4 MHz Internal Oscillator for Digital Timing
- ▪ Serial-Interface Controls Chip Functions
- ▪ Synchronous Rectification for Low Power Dissipation
- ▪ Internal UVLO and Thermal Shutdown Circuitry
- ▪ Crossover-Current Protection
- ▪ Precision 2 V Reference
- ▪ Inputs Compatible with 3.3 or 5 V Control Signals
- ▪ Sleep and Idle Modes
規格
以下是所選零件的基本參數,涉及零件的特性及其所屬類別。
Manufacturer | ALLEGRO | Product Category ! | Motor Drivers and Controllers |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。
常見問題解答
What is A3979SLPT?
The A3979SLPT is a microstepping motor driver integrated circuit designed by Allegro MicroSystems. It is specifically designed for driving bipolar stepper motors in a wide range of applications, including 3D printers, CNC machines, robotics, and automated equipment.
How Does A3979SLPT Work?
The A3979SLPT works by converting digital control signals into precise current waveforms to drive the stepper motor. It utilizes a chopper control technique to regulate the current in each phase of the motor, enabling smooth and accurate microstepping operation. The driver includes built-in translator for easy interfacing with the step and direction signals from a microcontroller or other motion control system.
How Many Pins does A3979SLPT have and What are the Functions of the Pinout Configuration?
The A3979SLPT is housed in a 28-lead HTSSOP (Heat Sink Thin Shrink Small Outline Package) package. The pinout configuration includes:
- VREF: Reference voltage pin for setting motor current.
- DIR: Direction control input for motor rotation.
- STEP: Step input for controlling microstepping rate.
- OUT1, OUT2, OUT3, OUT4: Motor output pins for bipolar motor winding connections.
- GND: Ground connection pin.
- ENABLE: Enable input for activating or deactivating the outputs.
- VMOT: Motor supply voltage input.
- VDD: Logic supply voltage input.
What are the Pros and Cons of A3979SLPT?
Pros:
- Microstepping Capability: Provides smooth and precise microstepping for enhanced motor control.
- Chopper Control: Delivers efficient current regulation for reduced power dissipation and improved thermal performance.
- Built-in Translator: Simplifies interfacing with control signals, reducing the complexity of external circuitry.
- Thermal Shutdown and Overcurrent Protection: Features built-in protection mechanisms for reliable motor operation and safety.
- Wide Application Range: Suitable for various motion control applications requiring precise motor control.
Cons:
- Complexity: Microstepping motor drivers like the A3979SLPT may require careful attention to layout and thermal management for optimal performance.
- External Components: May require additional passive components such as resistors and capacitors for motor current regulation and noise suppression.
Are There Any Equivalents/Alternatives to A3979SLPT for Recommendation?
- The DRV8825 from Texas Instruments is a similar microstepping motor driver with extended features including overcurrent protection and adjustable current control.
- Alternatives to the A3979SLPT include the TMC2100 from Trinamic and the LV8729 from On Semiconductor.
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