SLOSE54C June   2020  – July 2022 DRV8428

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1. 5.1 Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Indexer Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Stepper Motor Driver Current Ratings
        1. 7.3.1.1 Peak Current Rating
        2. 7.3.1.2 RMS Current Rating
        3. 7.3.1.3 Full-Scale Current Rating
      2. 7.3.2 PWM Motor Drivers
      3. 7.3.3 Microstepping Indexer
      4. 7.3.4 Controlling VREF with an MCU DAC
      5. 7.3.5 Current Regulation, Off-time and Decay Modes
        1. 7.3.5.1 Mixed Decay
        2. 7.3.5.2 Smart tune Dynamic Decay
        3. 7.3.5.3 Smart tune Ripple Control
        4. 7.3.5.4 Blanking time
      6. 7.3.6 Linear Voltage Regulators
      7. 7.3.7 Logic Level, tri-level, quad-level and seven-level Pin Diagrams
        1. 7.3.7.1 EN/nFAULT Pin
      8. 7.3.8 Protection Circuits
        1. 7.3.8.1 VM Undervoltage Lockout (UVLO)
        2. 7.3.8.2 Overcurrent Protection (OCP)
        3. 7.3.8.3 Thermal Shutdown (OTSD)
        4. 7.3.8.4 Fault Condition Summary
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode (nSLEEP = 0)
      2. 7.4.2 Disable Mode (nSLEEP = 1, EN/nFAULT = 0/Hi-Z)
      3. 7.4.3 Operating Mode (nSLEEP = 1, EN/nFAULT = 1)
      4. 7.4.4 Functional Modes Summary
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Stepper Motor Speed
        2. 8.2.2.2 Current Regulation
        3. 8.2.2.3 Decay Modes
        4. 8.2.2.4 Application Curves
      3. 8.2.3 Thermal Application
        1. 8.2.3.1 Power Dissipation
          1. 8.2.3.1.1 Conduction Loss
          2. 8.2.3.1.2 Switching Loss
          3. 8.2.3.1.3 Power Dissipation Due to Quiescent Current
          4. 8.2.3.1.4 Total Power Dissipation
        2. 8.2.3.2 Device Junction Temperature Estimation
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.6 Indexer Timing Requirements

Typical limits are at TJ = 25°C and VVM = 24 V. Over recommended operating conditions unless otherwise noted.
NO. MIN MAX UNIT
1 ƒSTEP Step frequency 500(1) kHz
2 tWH(STEP) Pulse duration, STEP high 970 ns
3 tWL(STEP) Pulse duration, STEP low 970 ns
4 tSU(DIR, Mx) Setup time, DIR or MODEx to STEP rising 200 ns
5 tH(DIR, Mx) Hold time, DIR or MODEx to STEP rising 200 ns
(1) STEP input can operate up to 500 kHz, but system bandwidth is limited by the motor load.
GUID-3EFA9B26-8B0E-421A-B203-6527EA40CA27-low.gifFigure 6-1 STEP and DIR Timing Diagram