Quality Standards and Environmental Certifications
×

Contact Sales

Have Questions? Let us help!

We're passionate about innovation. Reach out and you'll hear back from an expert shortly.

Required*

This field is required

This field is required

Please enter a valid Email Address

This field is required

This field is required

This field is required

This field is required

This field is required

This field is required

Thank you for connecting with us!

One of our solution experts will be in touch with you shortly. Keep reading to learn more about our industry leading solutions.


Quad DMOS Full Bridge PWM Motor Driver

A3988

Product Image

The A3988SJPTR-T & A3988SEVTR-T variants are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of these devices is currently restricted to existing customer applications. The devices should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available.
Date of status change: June 1, 2016.

A3988 ECAD Model
Download Datasheet
Navigate

Description

Top Features

Packaging

The A3988 is a quad DMOS full-bridge driver capable of driving up to two stepper motors or four dc motors. Each full-bridge output is rated up to 1.2 A and 36 V. The A3988 includes fixed off-time pulse width modulation (PWM) current regulators, along with 2-bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps, and dc motors in forward, reverse, and coast modes. The PWM current regulator uses the Allegro patented mixed decay mode for reduced audible motor noise, increased step accuracy, and reduced power dissipation.

Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.

Protection features include thermal shutdown with hysteresis, undervoltage lockout (UVLO) and crossover current protection. Special power up sequencing is not required.

The A3988 is supplied in two packages, EV and JP, with exposed power tabs for enhanced thermal performance. The EV is a 6 mm × 6 mm, 36 pin QFN package with a nominal overall package height of 0.90 mm. The JP is a 7 mm × 7 mm 48 pin LQFP. Both packages are lead (Pb) free, with 100% matte tin leadframe plating.


  • 36 V output rating
  • 4 full bridges
  • Dual stepper motor driver
  • High current outputs
  • 3.3 and 5 V compatible logic supply
  • Synchronous rectification
  • Internal undervoltage lockout (UVLO)
  • Thermal shutdown circuitry
  • Crossover-current protection
  • Low profile QFN package

The A3988 is supplied in two packages, EV and JP, with exposed power tabs for enhanced thermal performance. The EV is a 6 mm × 6 mm, 36 pin QFN package with a nominal overall package height of 0.90 mm.

The JP is a 7 mm × 7 mm 48 pin LQFP.

Both packages are lead (Pb) free, with 100% matte tin leadframe plating.

 

 

× not found

Part Number Specifications and Availability