SLVSFV5A july   2023  – july 2023 DRV8262

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  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
      1. 6.4.1 Transient Thermal Impedance & Current Capability
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1  Overview
    2. 7.2  Functional Block Diagram
    3. 7.3  Feature Description
    4. 7.4  Device Operational Modes
      1. 7.4.1 Dual H-Bridge Mode (MODE1 = 0)
      2. 7.4.2 Single H-Bridge Mode (MODE1 = 1)
    5. 7.5  Current Sensing and Regulation
      1. 7.5.1 Current Sensing and Feedback
      2. 7.5.2 Current Regulation
        1. 7.5.2.1 Mixed Decay
        2. 7.5.2.2 Smart tune Dynamic Decay
      3. 7.5.3 Current Sensing with External Resistor
    6. 7.6  Charge Pump
    7. 7.7  Linear Voltage Regulator
    8. 7.8  VCC Voltage Supply
    9. 7.9  Logic Level, Tri-Level and Quad-Level Pin Diagrams
    10. 7.10 Protection Circuits
      1. 7.10.1 VM Undervoltage Lockout (UVLO)
      2. 7.10.2 VCP Undervoltage Lockout (CPUV)
      3. 7.10.3 Logic Supply Power on Reset (POR)
      4. 7.10.4 Overcurrent Protection (OCP)
      5. 7.10.5 Thermal Shutdown (OTSD)
      6. 7.10.6 nFAULT Output
      7. 7.10.7 Fault Condition Summary
    11. 7.11 Device Functional Modes
      1. 7.11.1 Sleep Mode
      2. 7.11.2 Operating Mode
      3. 7.11.3 nSLEEP Reset Pulse
      4. 7.11.4 Functional Modes Summary
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Driving Brushed-DC Motors
        1. 8.1.1.1 Brushed-DC Motor Driver Typical Application
        2. 8.1.1.2 Power Loss Calculations - Dual H-bridge
        3. 8.1.1.3 Power Loss Calculations - Single H-bridge
        4. 8.1.1.4 Junction Temperature Estimation
        5. 8.1.1.5 Application Performance Plots
      2. 8.1.2 Driving Stepper Motors
        1. 8.1.2.1 Stepper Driver Typical Application
        2. 8.1.2.2 Power Loss Calculations
        3. 8.1.2.3 Junction Temperature Estimation
      3. 8.1.3 Driving Thermoelectric Coolers (TEC)
  10. 9 Package Thermal Considerations
    1. 9.1 DDW Package
      1. 9.1.1 Thermal Performance
        1. 9.1.1.1 Steady-State Thermal Performance
        2. 9.1.1.2 Transient Thermal Performance
    2. 9.2 DDV Package
    3. 9.3 PCB Material Recommendation
  11. 10Power Supply Recommendations
    1. 10.1 Bulk Capacitance
    2. 10.2 Power Supplies
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  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

8.1.2.1 Stepper Driver Typical Application

The following schematic shows the DRV8262 driving a stepper motor.

GUID-20220714-SS0I-M4QR-6V3Q-D04PVXXGQGTS-low.svg Figure 8-5 Driving One Stepper Motor

The full-scale current (IFS) is the maximum current driven through either winding. This quantity will depend on the VREF voltage and the resistor connected from IPROPI pin to ground.

IFS x AIPROPI = VVREF / RIPROPI

The maximum allowable voltage on the VREF pins is 3.3 V. DVDD can be used to provide VREF through a resistor divider.

Note:

The IFS current must also follow Equation 6 to avoid saturating the motor. VM is the motor supply voltage, and RL is the motor winding resistance.

Equation 6. GUID-3DD1F9AE-9EC1-4E01-A720-98A0EF89BB58-low.gif

If the target motor speed is too high, the motor will not spin. Make sure that the motor can support the target speed.

For a desired motor speed (v), microstepping level (nm), and motor full step angle (θstep), determine the frequency of the input waveform as follows -

Equation 7. GUID-BD4BA16A-9F42-4D19-87AB-E48D54AA15D9-low.gif

θstep can be found in the stepper motor data sheet or written on the motor itself.

The frequency ƒstep gives the frequency of input change on the DRV8262. 1/ ƒstep = tSTEP on the diagram below. Equation 8 shows an example calculation for a 120 rpm target speed and 1/2 step.

Equation 8. GUID-8B3B4AE0-41E9-43FC-945E-D0BF6B40EF22-low.gif
GUID-20220708-SS0I-LGKZ-PV3X-0FWBPRHJGVX9-low.svgFigure 8-6 Example 1/2 Stepping Operation

The IPROPI pins output the current of each H-bridge, corresponding to current of coil A and coil B of the stepper motor during drive and slow-decay (high-side recirculation) modes.