32-V, 1.5-A dual bipolar stepper motor driver with current regulation and 1/8 microstepping  


Product details


Number of full bridges 4 Vs (Min) (V) 8 Vs (Max) (V) 32 Full-scale current (A) 1.5 Peak output current (A) 1.5 RDS(ON) (HS + LS) (mOhms) 550 Control mode STEP/DIR Control interface Hardware (GPIO) Micro-stepping levels 8 Features Current Regulation Approx. price (US$) 1.76 | 1ku open-in-new Find other Stepper motor drivers

Package | Pins | Size

HTSSOP (DCA) 48 101 mm² 12.5 x 8.1 open-in-new Find other Stepper motor drivers


  • Dual PWM Microstepping Motor Driver
    • Built-In Microstepping Indexers
    • Up to 1.5-A Current Per Winding
    • Three-Bit Winding Current Control
      Allows up to Eight Current Levels
    • Low MOSFET On-Resistance
    • Selectable Slow or Mixed Decay Modes
  • 8-V to 32-V Operating Supply Voltage Range
  • Internal Charge Pump for Gate Drive
  • Built-in 3.3-V Reference
  • Simple Step/Direction Interface
  • Fully Protected Against Undervoltage,
    Overtemperature, and Overcurrent
  • Thermally-Enhanced Surface Mount Package
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The DRV8821 provides a dual microstepping-capable stepper motor controller/driver solution for printers, scanners, and other office automation equipment applications.

Two independent stepper motor driver circuits include four H-bridge drivers and microstepping-capable indexer logic. Each of the motor driver blocks employ N-channel power MOSFETs configured as an H-bridge to drive the motor windings.

A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step, half-step, quarter-step, or eighth step modes, and the selection of slow or mixed decay modes.

Internal shutdown functions are provided for over current protection, short-circuit protection, undervoltage lockout, and overtemperature.

The DRV8821 is packaged in a 48-pin HTSSOP package (Eco-friendly : RoHS & no Sb/Br).

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Similar but not functionally equivalent to the compared device:
DRV8885 ACTIVE 37-V, 1.5-A bipolar stepper motor driver with integrated current sensing & 1/16 microstepping The DRV8885 is a single-channel stepper driver with integrated microstepping up to 1/16 and Integrated Current Sensing

Technical documentation

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Type Title Date
* Datasheet DRV8821 Dual Stepper Motor Controller and Driver datasheet (Rev. J) Jan. 06, 2016
Application notes Various Reference Voltage Driving Techniques for Motor Drive Current Regulation (Rev. A) Jan. 27, 2020
Technical articles Anything but discrete: How to simplify 48-V to 60-V DC-fed three-phase inverter design Feb. 01, 2019
Application notes Best Practices for Board Layout of Motor Drivers (Rev. A) Jan. 22, 2019
Application notes PowerPAD™ Thermally Enhanced Package (Rev. H) Jul. 06, 2018
Technical articles Integrated intelligence part 3: motor startup from standstill position Dec. 11, 2017
Technical articles Integrated intelligence part 2: motor startup open loop acceleration Dec. 04, 2017
Technical articles Six weird ways to design with a brushless-DC driver Aug. 28, 2017
User guides DRV8821-23 EVM GUI (Rev. A) Apr. 26, 2017
More literature TM4C123x Stepper Motor Control Product Summary Jul. 06, 2015
Application notes Calculating Motor Driver Power Dissipation Feb. 06, 2012
Application notes Understanding Motor Driver Current Ratings Feb. 06, 2012
Application notes DRV88xx Current Recirculation and Decay Modes Application Report Mar. 02, 2009
Application notes PowerPAD™ Made Easy (Rev. B) May 12, 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The DRV8821 is a dual stepper motor controller evaluation module includes device, cabling and software to ease the evaluation of the device when driving a customer's motor.

  • DRV8821 dual stepper motor controller
  • Easy to use GUI to allow for easy setup
  • Includes all necessary cabling and software to control DRV8821

CAD/CAE symbols

Package Pins Download
HTSSOP (DCA) 48 View options

Ordering & quality

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