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DRV8434

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48-V, 2.5-A bipolar stepper motor driver with integrated current sensing and 1/256 microstepping

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Product details

Parameters

Number of full bridges 2 Vs (Min) (V) 4.5 Vs ABS (Max) (V) 50 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 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Stepper motor drivers

Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 9.7 x 4.4 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
    • ±5% Full-Scale Current Accuracy
  • Smart tune decay technology, Fixed slow, and mixed decay options
  • 4.5 to 48-V Operating Supply Voltage Range
  • Low RDS(ON): 330 mΩ HS + LS at 24 V, 25°C
  • High Current Capacity Per Bridge: 4 A peak, 2.5 A Full-Scale, 1.8 A rms
  • Configurable Off-Time PWM Chopping
    • 7-µs, 16-µs, 24-µs, or 32-µs.
  • Supports 1.8-V, 3.3-V, 5.0-V Logic Inputs
  • Low-Current Sleep Mode (2 µA)
  • Spread spectrum clocking for low electromagnetic interference (EMI)
  • Protection Features
    • VM Undervoltage Lockout (UVLO)
    • Charge Pump Undervoltage (CPUV)
    • Overcurrent Protection (OCP)
    • Open Load Detection (OL)
    • Thermal Shutdown (OTSD)
    • Fault Condition Output (nFAULT)
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Description

The DRV8434 is a stepper motor driver for industrial and consumer end equipment applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8434 is capable of providing an output current up to 4-A peak, 2.5-A full-scale, or 1.8-A root mean square (rms) (dependent on PCB design).

The DRV8434 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 selectable between smart tune, slow and mixed decay options. Smart tune decay technology automatically adjusts for optimal current regulation performance and compensates for motor variation and aging effects.

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 different step modes ranging from full-step to 1/256 microstepping. A low-power sleep mode is provided for very low standby quiescent standby current using a dedicated nSLEEP pin. Protection features are provided for 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
* Data sheet DRV8434/35 Stepper Drivers With Integrated Current Sense datasheet Oct. 31, 2019
Application note Intelligent Stepper Motor Driver (Rev. B) Jan. 20, 2021
Application note Methods to Configure Current Regulation for Brushed and Stepper Motors (Rev. B) Jan. 19, 2021
Certificate DRV8434EVM EU RoHS Declaration of Conformity (DoC) Jan. 18, 2021
Technical article 4 key questions about motor design challenges Nov. 30, 2020
Application note Smart Tune for Quiet and Smooth Stepper Motor Operation (Rev. A) Nov. 01, 2020
White paper Stepper Motors Made Easy with Smart Tune (Rev. C) Nov. 01, 2020
Application note Advantages of Integrated Current Sensing (Rev. A) Oct. 09, 2020
Application note How to Improve Motion Smoothness and Accuracy of Stepper Motors Sep. 18, 2020
Technical article Drive unipolar stepper motors as bipolar stepper motors with a simple wiring reconfiguration Apr. 09, 2020
Technical article How stepper motors improve noise and efficiency in automotive system design Nov. 19, 2019
Application note Open Load Detection in Intergrated Drivers (Rev. A) Nov. 07, 2019
White paper How smart tune regulates current in stepper motors (Rev. A) Mar. 19, 2019
Application note Smart Tuning for Efficient Stepper Driving Nov. 20, 2018
Technical article Getting smart about tuning your stepper motor Aug. 23, 2018
Application note PowerPAD™ Thermally Enhanced Package (Rev. H) Jul. 06, 2018
Application note PowerPAD™ Made Easy (Rev. B) May 12, 2004

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
75
Description

The DRV8434 evaluation module (EVM) allows easy evaluation of the DRV8434 device.

The DRV8434 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, and a microstepping (...)

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

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 28 View options
VQFN (RGE) 24 View options

Ordering & quality

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  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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