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DRV8818A
  • DRV8818A
  • DRV8818A

DRV8818A

PREVIEW

35V, 2.5A stepper motor driver with 1/8 microstepping, STEP/DIR interface and smart tune technology

Texas Instruments DRV8818A Product Info

1 April 2026 3

Parameters

Vs ABS (max) (V)

35

Vs (min) (V)

8

Peak output current (A)

3.5

Control mode

STEP/DIR

Control interface

Hardware (GPIO)

Number of full bridges

2

Full-scale current (A)

2.5

RDS(ON) (HS + LS) (mΩ)

370

Sleep current (µA)

3

Microstepping levels

8

Decay mode

Fast, Mixed, Slow, Smart Tune

Features

Current Regulation, Smart Tune

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Package

HTSSOP (PWP)-28-62.08 mm² 9.7 x 6.4

Features

  • Stepper motor driver
    • Simple STEP/DIR interface
    • Up to 1/8 microstepping indexer
    • Programmable mixed decay, blanking, and off time
  • 8V to 35V operating supply voltage range
  • Smart tune, slow, fast, and mixed decay options
  • High current capacity: 2.5A full-scale, 1.8A RMS
  • Low RDS(ON): 310mΩ HS + LS at 24V, 25°C
  • Separate logic supply voltage (VCC)
  • Pin-to-pin compatible with
  • Thermally-enhanced surface mount package
  • Protection features
    • VM Undervoltage Lockout (UVLO)
    • Overcurrent Protection (OCP)
    • Thermal Shutdown (TSD)
    • Indexer zero position output (HOMEn)
  • Stepper motor driver
    • Simple STEP/DIR interface
    • Up to 1/8 microstepping indexer
    • Programmable mixed decay, blanking, and off time
  • 8V to 35V operating supply voltage range
  • Smart tune, slow, fast, and mixed decay options
  • High current capacity: 2.5A full-scale, 1.8A RMS
  • Low RDS(ON): 310mΩ HS + LS at 24V, 25°C
  • Separate logic supply voltage (VCC)
  • Pin-to-pin compatible with
  • Thermally-enhanced surface mount package
  • Protection features
    • VM Undervoltage Lockout (UVLO)
    • Overcurrent Protection (OCP)
    • Thermal Shutdown (TSD)
    • Indexer zero position output (HOMEn)

Description

The DRV8818A provides an integrated stepper motor driver for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers and microstepping indexer logic to control a stepper motor.

The output driver block for each consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings.

A simple STEP/DIR interface allows controller circuits to be easily interfaced. The mode pins allow for configuration of the motor in full-step, half-step, quarter-step, or eighth-step modes. Decay mode and PWM off time are programmable.

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

The DRV8818A is packaged in a 28-pin HTSSOP package with PowerPAD™.

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