SLVSHB2 February   2024 DRV8262-Q1

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
      1. 5.4.1 Transient Thermal Impedance & Current Capability
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1  Overview
    2. 6.2  Functional Block Diagram
    3. 6.3  Feature Description
    4. 6.4  Device Operational Modes
      1. 6.4.1 Dual H-Bridge Mode (MODE1 = 0)
      2. 6.4.2 Single H-Bridge Mode (MODE1 = 1)
    5. 6.5  Current Sensing and Regulation
      1. 6.5.1 Current Sensing and Feedback
      2. 6.5.2 Current Regulation
        1. 6.5.2.1 Mixed Decay
        2. 6.5.2.2 Smart tune Dynamic Decay
      3. 6.5.3 Current Sensing with External Resistor
    6. 6.6  Charge Pump
    7. 6.7  Linear Voltage Regulator
    8. 6.8  VCC Voltage Supply
    9. 6.9  Logic Level, Tri-Level and Quad-Level Pin Diagrams
    10. 6.10 Protection Circuits
      1. 6.10.1 VM Undervoltage Lockout (UVLO)
      2. 6.10.2 VCP Undervoltage Lockout (CPUV)
      3. 6.10.3 Logic Supply Power on Reset (POR)
      4. 6.10.4 Overcurrent Protection (OCP)
      5. 6.10.5 Thermal Shutdown (OTSD)
      6. 6.10.6 nFAULT Output
      7. 6.10.7 Fault Condition Summary
    11. 6.11 Device Functional Modes
      1. 6.11.1 Sleep Mode
      2. 6.11.2 Operating Mode
      3. 6.11.3 nSLEEP Reset Pulse
      4. 6.11.4 Functional Modes Summary
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Driving Brushed-DC Motors
        1. 7.1.1.1 Brushed-DC Motor Driver Typical Application
        2. 7.1.1.2 Power Loss Calculations - Dual H-bridge
        3. 7.1.1.3 Power Loss Calculations - Single H-bridge
        4. 7.1.1.4 Junction Temperature Estimation
        5. 7.1.1.5 Application Performance Plots
      2. 7.1.2 Driving Stepper Motors
        1. 7.1.2.1 Stepper Driver Typical Application
        2. 7.1.2.2 Power Loss Calculations
        3. 7.1.2.3 Junction Temperature Estimation
      3. 7.1.3 Driving Thermoelectric Coolers (TEC)
  9. 8 Package Thermal Considerations
    1. 8.1 DDW Package
      1. 8.1.1 Thermal Performance
        1. 8.1.1.1 Steady-State Thermal Performance
        2. 8.1.1.2 Transient Thermal Performance
    2. 8.2 PCB Material Recommendation
  10. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
    2. 9.2 Power Supplies
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Tape and Reel Information

Package Options

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

9.1 Bulk Capacitance

Having appropriate local bulk capacitance is an important factor in motor drive system design. It is generally beneficial to have more bulk capacitance, while the disadvantages are increased cost and physical size.

The amount of local capacitance needed depends on a variety of factors, including:

  • The highest current required by the motor system
  • The power supply’s capacitance and ability to source current
  • The amount of parasitic inductance between the power supply and motor system
  • The acceptable voltage ripple
  • The type of motor used (brushed DC, brushless DC, stepper)
  • The motor braking method

The inductance between the power supply and motor drive system will limit the rate current can change from the power supply. If the local bulk capacitance is too small, the system will respond to excessive current demands or dumps from the motor with a change in voltage. When adequate bulk capacitance is used, the motor voltage remains stable and high current can be quickly supplied.

The data sheet generally provides a recommended value, but system-level testing is required to determine the appropriate sized bulk capacitor.

The voltage rating for bulk capacitors should be higher than the operating voltage, to provide margin for cases when the motor transfers energy to the supply.

GUID-6EB2B631-1277-4E41-B203-82CDBEC7359D-low.gifFigure 9-1 Example Setup of Motor Drive System With External Power Supply