JAJSM95A May   2023  – December 2023 DRV8845

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 Typical Operating Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Motor Configurations
      2. 7.3.2 Stepper Control Logic
      3. 7.3.3 DC Motor Control
      4. 7.3.4 PWM Current Control
      5. 7.3.5 Current Regulation and Decay Mode
      6. 7.3.6 Blanking Time
      7. 7.3.7 Charge Pump
      8. 7.3.8 Logic-Level Pin Diagram
      9. 7.3.9 Protection Circuits
        1. 7.3.9.1 VM Undervoltage Lockout (UVLO)
        2. 7.3.9.2 VCP Undervoltage Lockout (CPUV)
        3. 7.3.9.3 Overcurrent Protection (OCP)
        4. 7.3.9.4 Thermal Shutdown (OTSD)
        5. 7.3.9.5 Fault Condition Summary
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode (nSLEEP = 0)
      2. 7.4.2 Operating Mode (nSLEEP = 1)
      3. 7.4.3 nSLEEP Reset Pulse
      4. 7.4.4 Functional Modes Summary
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Application Schematics
    3. 8.3 Application Curves
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Bulk Capacitance
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.3.1 Motor Configurations

Each of the four H-bridges have independent PWM current control circuitry, that makes the DRV8845 capable of driving the following configurations -

  • Two stepper motors

  • One stepper motor and two BDC motors

  • Four BDC motors

In addition, H-bridge 3 and H-bridge 4 can be paralleled together. To enable this, PHASE4 must be left OPEN at start-up or when the device exits from sleep mode. By paralleling the two H-bridges, the DRV8845 supports two more configurations -

  • One stepper motor (H-bridge 1 and 2) and one BDC motor (paralleled H-bridge 3, 4)

  • Three BDC motors (H-bridge 1, H-bridge 2, paralleled H-bridge 3, 4)

Each H-bridge can deliver up to 1.5 A current. When paralleled, the combined H-bridge 3 and 4 can deliver up to 3 A current. Ensure OUT3A is shorted to OUT4A, OUT3B is shorted to OUT4B and SENSE3 is shorted to SENSE4 pin.