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DRV8849

ACTIVE

38-V 1.5-A dual stepper motor driver with smart tune and integrated current sensing

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Data sheet

DRV8849

ACTIVE
Data sheet Order now

Product details

Number of full bridges 4 Vs (min) (V) 4.5 Vs ABS (max) (V) 40 Full-scale current (A) 1.5 Peak output current (A) 2.5 RDS(ON) (HS + LS) (mΩ) 900 Sleep current (µA) 2 Control mode STEP/DIR Control interface Hardware (GPIO) Microstepping levels 256 Features Current Regulation, Integrated Current Sensing, Low-Power Sleep Mode, Smart Tune Rating Catalog Operating temperature range (°C) -40 to 125
Number of full bridges 4 Vs (min) (V) 4.5 Vs ABS (max) (V) 40 Full-scale current (A) 1.5 Peak output current (A) 2.5 RDS(ON) (HS + LS) (mΩ) 900 Sleep current (µA) 2 Control mode STEP/DIR Control interface Hardware (GPIO) Microstepping levels 256 Features Current Regulation, Integrated Current Sensing, Low-Power Sleep Mode, Smart Tune Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (RHH) 36 36 mm² 6 x 6
  • Dual stepper motor driver
    • STEP/DIR interface
    • Up to 1/256 microstepping indexer
  • 4.5 to 38-V Operating supply voltage range
  • 900 mΩ HS + LS RDS(ON) at 24 V, 25°C
  • 1.5 A full-scale, 1.1 A rms current per H-bridge
  • Integrated current sense functionality
    • ±5% full-scale current accuracy
    • No sense resistors required
  • Smart tune decay technology
  • Configurable off-time PWM chopping in Smart tune
    • 8-µs, 16-µs, or 32-µs
  • Supports 3.3-V, 5.0-V logic inputs
  • Low-current sleep mode (1.3 µA)
  • Protection features for each Stepper
    • VM undervoltage lockout (UVLO)
    • Charge pump undervoltage (CPUV)
    • Overcurrent protection (OCP)
    • Thermal shutdown (OTSD)
    • Fault condition output (nFAULT)
  • Dual stepper motor driver
    • STEP/DIR interface
    • Up to 1/256 microstepping indexer
  • 4.5 to 38-V Operating supply voltage range
  • 900 mΩ HS + LS RDS(ON) at 24 V, 25°C
  • 1.5 A full-scale, 1.1 A rms current per H-bridge
  • Integrated current sense functionality
    • ±5% full-scale current accuracy
    • No sense resistors required
  • Smart tune decay technology
  • Configurable off-time PWM chopping in Smart tune
    • 8-µs, 16-µs, or 32-µs
  • Supports 3.3-V, 5.0-V logic inputs
  • Low-current sleep mode (1.3 µA)
  • Protection features for each Stepper
    • VM undervoltage lockout (UVLO)
    • Charge pump undervoltage (CPUV)
    • Overcurrent protection (OCP)
    • Thermal shutdown (OTSD)
    • Fault condition output (nFAULT)

The DRV8849 is a dual stepper motor driver for industrial and consumer applications. The device is fully integrated with four N-channel power MOSFET H-bridge drivers, one microstepping indexer for each stepper, and integrated current sensing. The DRV8849 is capable of driving up to 1.5-A full-scale output current (dependent on PCB design).

The DRV8849 uses an internal current sense architecture to eliminate the need for four external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune decay mode. Smart tune automatically adjusts for desired current regulation, compensates for motor variation and aging effects and reduces audible noise and vibration from the motor.

Simple STEP/DIR interfaces allow an external controller to manage the direction and step rate of the stepper motors. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin. Protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by one nFAULT pin for each stepper.

The DRV8849 is a dual stepper motor driver for industrial and consumer applications. The device is fully integrated with four N-channel power MOSFET H-bridge drivers, one microstepping indexer for each stepper, and integrated current sensing. The DRV8849 is capable of driving up to 1.5-A full-scale output current (dependent on PCB design).

The DRV8849 uses an internal current sense architecture to eliminate the need for four external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune decay mode. Smart tune automatically adjusts for desired current regulation, compensates for motor variation and aging effects and reduces audible noise and vibration from the motor.

Simple STEP/DIR interfaces allow an external controller to manage the direction and step rate of the stepper motors. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin. Protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by one nFAULT pin for each stepper.
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Technical documentation

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* Data sheet DRV8849: 38 V, 1.5 A Dual Stepper Driver with Integrated Current Sense, 1/256 Microstepping, STEP/DIR Interface and Smart Tune datasheet (Rev. A) PDF | HTML 13 Jul 2023
Product overview Brushed and Stepper Motor Drivers in Video Surveillance PDF | HTML 22 Feb 2024
Product overview Two New Dual-Stepper Motor Drivers PDF | HTML 22 Feb 2024
Certificate DRV8849EVM EU RoHS Declaration of Conformity (DoC) 28 Mar 2023

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Evaluation board

DRV8849EVM — DRV8849 evaluation module for dual stepper motor driver with smart tune and integrated current sense

The DRV8849 is a dual stepper motor driver for industrial and consumer applications. The device is fully integrated with four N-channel power MOSFET H-bridge drivers, one microstepping indexer for each stepper and integrated current sensing. The DRV8849 is capable of driving up to 1.5-A (limited (...)
User guide: PDF | HTML
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VQFN (RHH) 36 View options
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