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ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip

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    Buy cheap ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip from wholesalers
     
    Buy cheap ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip from wholesalers
    • Buy cheap ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip from wholesalers
    • Buy cheap ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip from wholesalers
    • Buy cheap ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip from wholesalers
    • Buy cheap ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip from wholesalers

    ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip

    Ask Lasest Price
    Brand Name : Allegro MicroSystems
    Model Number : A3977SLPTR-T
    Price : $Negotiate
    Payment Terms : T/T, Western Union, MoneyGram
    Supply Ability : 50000-pcs-Mouth
    Delivery Time : 3-4work days
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    ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip

    A3977 Microstepping DMOS Driver with Translator CHIP


    Description


    The A3977 is a complete microstepping motor driver with built-in 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 currentdecay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.


    The translator is the key to the easy implementation of the A3977. Simply inputting one pulse on the STEP input drives the motor one step (two logic inputs determine if it is a full-, half-, quarter-, or eighth-step). There are no phase-sequence tables, high-frequency control lines, or complex interfaces to program. The A3977 interface is an ideal fit for applications where a complex microprocessor is unavailable or overburdened.


    Internal synchronous-rectification control circuitry is provided to improve power dissipation during PWM operation. Internal circuit protection includes thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power-up sequencing is not required. The A3977 is supplied in a thin (<1.2 mm) 28-pin TSSOP with an exposed thermal pad (suffix LP).


    The A3977 is lead (Pb) free, with 100% matte tin leadframe plating


    Features


    • ±2.5 A, 35 V output rating

    • Low RDS(on) outputs, 0.28 Ω source, 0.22 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



    Applications


    When a PWM off-cycle is triggered by an internal fixed off-time cycle, load current will recirculate according to the decay mode selected by the control logic. The A3977 synchronous rectification feature will turn on the appropriate MOSFETs during the current decay and effectively short out the body diodes with the low RDS(on) driver. This will reduce power dissipation significantly and eliminate the need for external Schottky diodes for most applications. The synchronous rectification can be set in either active mode or disabled mode. Active Mode When the SR input is logic low, active mode is enabled and synchronous rectification will occur. This mode prevents reversal of the load current by turning off synchronous rectification when a zero current level is detected. This prevents the motor winding from conducting in the reverse direction. Disabled Mode When the SR input is logic high, synchronous rectification is disabled. This mode is typically used when external diodes are required to transfer power dissipation from the A3977 package to the external diodes



    Date Sheet

    Product AttributeAttribute Value
    Allegro MicroSystems
    Product Category:Motor / Motion / Ignition Controllers & Drivers
    Brushed DC Motor Drivers
    Microstepping
    8 V to 35 V
    2.5 A
    8 mA
    - 20 C
    + 85 C
    SMD/SMT
    TSSOP-28
    Reel
    Cut Tape
    MouseReel
    Brand:Allegro MicroSystems
    Load Voltage Rating:35 V
    Moisture Sensitive:Yes
    Number of Outputs:2 Output
    Operating Frequency:500 kHz
    Product Type:Motor / Motion / Ignition Controllers & Drivers
    Factory Pack Quantity:4000
    Subcategory:PMIC - Power Management ICs

    Quality Assurance


    1: Before the products are put into storage, we will preliminarily verify the external packaging,labels,

    quantity, etc. of the products;


    2: After the preliminary inspection, the products will enter the inspection waiting area,and thenwe will

    use professional equipment for inspection Equipment such as X-RAY gold sample detection, silk

    screen contrast detection with magnifying glass, and alcohol detection,The silk screen shall be

    checked, and the qualified ones shall be printed and put into storage.


    3: The product will be stored in a constant temperature and humidity environment, and aspecially

    assigned person will check, confirm and record it every day.


    4: Before the products are delivered from the warehouse, the first and second tests will be repeated

    according to the customer's order to ensure that the outgoing products reviewthe customer's

    requirements.



    Transportations & Payments



    Frequently Asked Questions


    Shipping:

    1, We can shipping all over the world by DHL, UPS, FEdex, TNT and EMS.The packaging is very

    safe and strong. Please nitfy me you have any special needs
    2, It will take around 3-5 days to reach your hands.

    Product Type & condition:
    Because of the fluctuant sales situation. the stock parts are always changing and the stock list cannot

    be, promptly updated.So please consult the stock situation when you inquire.

    Buyer Reading:
    1. Please confirm receipt of products if the items you received,and if the goods was damaged please

    contact us immediately. send the photo to us that we can check and give you best solution

    2. We only guarantee delivery in time but we couldn't control the express delivery time. Our related

    sales person will be responsible to send the AWB for the delivered goods in the next workday.

    you can check the AWB in the website which we send to you. For the AWByou also can call to the

    local branch of the express company in your company.

    Pre-sales service :

    1. Our team design and make solutions based on different requirements from different customers.

    2. We provide 24-hours service,and every message you quote inquiry will be replied within12 hours


    Quality ALLEGRO A3977SLPTR-T A3977 Microstepping DMOS Driver with Translator Integrated Circuit IC Chip for sale
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