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DRV8434A

ACTIVE

48-V, 2.5-A bipolar stepper motor driver, integrated current sensing & stall detection (GPIO)

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Product details

Parameters

Number of full bridges 2 Vs (Min) (V) 4.5 Vs (Max) (V) 48 Full-scale current (A) 2.5 Peak output current (A) 4 RDS(ON) (HS + LS) (mOhms) 330 Sleep current (uA) 2 Control mode STEP/DIR Control interface Hardware (GPIO) Micro-stepping levels 256 Features Current Regulation, Integrated Current Sensing, Smart Tune, Stall Detection open-in-new Find other Stepper motor drivers

Package | Pins | Size

VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other Stepper motor drivers

Features

  • PWM Microstepping Stepper Motor Driver
    • Simple STEP/DIR Interface
    • Up to 1/256 Microstepping Indexer
  • Integrated Current Sense Functionality
    • No Sense Resistors Required
    • ±4% Full-Scale Current Accuracy
  • Smart tune ripple control decay
  • Stall Detection using GPIO pins

  • 4.5 to 48-V Operating Supply Voltage Range
  • Low RDS(ON): 330 mΩ HS + LS at 24 V, 25°C
  • High Current Capacity: 2.5 A Full-Scale, 1.8 A rms
  • Supports 1.8 V, 3.3 V, 5.0 V Logic Inputs
  • Low-Current Sleep Mode (2 µA)
  • Spread spectrum clocking for low EMI
  • Small Package and Footprint

  • Protection Features
    • VM Undervoltage Lockout (UVLO)
    • Charge Pump Undervoltage (CPUV)
    • Overcurrent Protection (OCP)
    • Sensorless stall detection
    • Open Load Detection (OL)
    • Thermal Shutdown (OTSD)
    • Fault Condition Output (nFAULT)

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Description

The DRV8434A is a stepper motor driver for industrial and consumer applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8434A is capable of driving up to 2.5 A full-scale output current (dependent on PCB thermal design).

The DRV8434A uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune ripple control decay. Smart tune automatically adjusts for optimal current regulation, compensates for motor variation and aging effects and reduces audible noise from the motor.

A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin.

The DRV8434A features advanced stall detection algorithm configurable by two digital IO and one analog IO pins, and does not require an SPI interface to detect stall. By detecting motor stall, system designers can identify if the motor was obstructed and take action as needed which can improve efficiency, prevent damage and reduce audible noise. Other protection features include supply undervoltage, charge pump faults, overcurrent, short circuits, open load, and overtemperature. Fault conditions are indicated by the nFAULT pin.

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Technical documentation

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Type Title Date
* Datasheet DRV8434A Stepper Driver With Integrated Current Sense, 1/256 Microstepping, smart tune and Stall Detection using GPIO pins datasheet Dec. 03, 2020
More literature DRV8434AEVM EU RoHS Declaration of Conformity (DoC) Dec. 03, 2020
Technical articles Drive unipolar stepper motors as bipolar stepper motors with a simple wiring reconfiguration Apr. 09, 2020
Technical articles How stepper motors improve noise and efficiency in automotive system design Nov. 19, 2019
Technical articles Getting smart about tuning your stepper motor Aug. 23, 2018
Technical articles The story of motor-drive integration Jan. 09, 2017

Design & development

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Hardware development

EVALUATION BOARD Download
75
Description

The DRV8434A evaluation module (EVM) allows easy evaluation of the DRV8434A device.

The DRV8434A devices are integrated motor-driver solutions for bipolar stepper motors. The device integrates two N-channel power MOSFET H-bridges, integrated current sense and regulation circuitry, analog stall (...)

Features
  • 4.5-V to 48-V operating voltage range
  • Up to 4-A peak current
  • A simple STEP/DIR input interface
  • Integrated current sense and microstepping indexer
  • Smart tune technology
  • Analog stall detection

CAD/CAE symbols

Package Pins Download
VQFN (RGE) 24 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

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