SLVSBA2E July   2012  – July 2025 DRV8844

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Output Stage
      2. 6.3.2 Logic Inputs
      3. 6.3.3 Bridge Control
      4. 6.3.4 Charge Pump
      5. 6.3.5 Protection Circuits
        1. 6.3.5.1 Overcurrent Protection (OCP)
        2. 6.3.5.2 Thermal Shutdown (TSD)
        3. 6.3.5.3 Undervoltage Lockout (UVLO)
    4. 6.4 Device Functional Modes
      1. 6.4.1 nRESET and nSLEEP Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Motor Voltage
      3. 7.2.3 Application Curves
    3.     Power Supply Recommendations
      1. 7.3.1 Bulk Capacitance
    4. 7.3 Layout
      1. 7.3.1 Layout Guidelines
      2. 7.3.2 Layout Example
      3. 7.3.3 Thermal Considerations
        1. 7.3.3.1 Heatsinking
      4. 7.3.4 Power Dissipation
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Community Resources
    3. 8.3 Trademarks
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.1 Output Stage

The DRV8844 contains four 1/2-H-bridge drivers using N-channel MOSFETs. A block diagram of the output circuitry is shown in Figure 6-1.

DRV8844 Motor Control CircuitryFigure 6-1 Motor Control Circuitry

The output pins are driven between VM and VNEG. VNEG is normally ground for single supply applications, and a negative voltage for dual supply applications.

Note that there are multiple VM motor power supply pins. All VM pins must be connected together to the motor supply voltage.