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2.5A Current Output Integrated Circuit IC Chip A3977SEDT Surface Mounting Type

China 2.5A Current Output Integrated Circuit IC Chip A3977SEDT Surface Mounting Type supplier

Large Image :  2.5A Current Output Integrated Circuit IC Chip A3977SEDT Surface Mounting Type

Product Details:

Place of Origin: Original
Brand Name: Original Manufacturer
Certification: Rosh
Model Number: A3977SEDT

Payment & Shipping Terms:

Minimum Order Quantity: 1
Price: Negotiation
Packaging Details: Original Packing
Delivery Time: In stock
Payment Terms: TT, Paypal, Western Union And So On
Supply Ability: 80000
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Detailed Product Description
Motor Type - Stepper: Bipolar Motor Type - AC, DC: -
Function: Driver - Fully Integrated, Control And Power Stage Output Configuration: Half Bridge (4)
Interface: Logic Technology: DMOS
Applications: General Purpose Current - Output: 2.5A


A3977SEDT Integrated Circuit IC Chip Bipolar Motor Driver DMOS Logic 44-PLCC (16.59x16.59)


Motor Type - Stepper



Motor Type - AC, DC




Driver - Fully Integrated, Control and Power Stage


Output Configuration

Half Bridge (4)








Step Resolution

1, 1/2, 1/4, 1/8



General Purpose


Current - Output



Voltage - Supply

3 V ~ 5.5 V


Voltage - Load

8 V ~ 35 V


Operating Temperature

-20°C ~ 150°C (TJ)


Mounting Type

Surface Mount


Package / Case

44-LCC (J-Lead)


Supplier Device Package

44-PLCC (16.59x16.59)


Base Part Number






• ±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



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 Vand ±2.5A. TheA3977 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.

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 controlcircuitry 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.


2.5A Current Output Integrated Circuit IC Chip A3977SEDT Surface Mounting Type

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Contact Person: Cary

Tel: +8613760106370

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