SLVSHN2 July   2024 DRV8962-Q1

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    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 Typical Characteristics
  7. 6Detailed Description
    1. 6.1  Overview
    2. 6.2  Functional Block Diagram
    3. 6.3  Feature Description
    4. 6.4  Independent Half-bridge Operation
    5. 6.5  Current Sensing and Regulation
      1. 6.5.1 Current Sensing and Feedback
      2. 6.5.2 Current Sensing with External Resistor
      3. 6.5.3 Current Regulation
    6. 6.6  Charge Pump
    7. 6.7  Linear Voltage Regulator
    8. 6.8  VCC Voltage Supply
    9. 6.9  Logic Level Pin Diagram
    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. 7Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Driving Solenoid Loads
        1. 7.1.1.1 Solenoid Driver Typical Application
        2. 7.1.1.2 Thermal Calculations
          1. 7.1.1.2.1 Power Loss Calculations
          2. 7.1.1.2.2 Junction Temperature Estimation
        3. 7.1.1.3 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 Brushed-DC Motors
        1. 7.1.3.1 Brushed-DC Driver Typical Application
        2. 7.1.3.2 Power Loss Calculation
        3. 7.1.3.3 Junction Temperature Estimation
        4. 7.1.3.4 Driving Single Brushed-DC Motor
      4. 7.1.4 Driving Thermoelectric Coolers (TEC)
      5. 7.1.5 Driving Brushless DC Motors
    2. 7.2 Package Thermal Considerations
      1. 7.2.1 Thermal Performance
        1. 7.2.1.1 Steady-State Thermal Performance
        2. 7.2.1.2 Transient Thermal Performance
      2. 7.2.2 PCB Material Recommendation
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 Bulk Capacitance
      2. 7.3.2 Power Supplies
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8Device and Documentation Support
    1. 8.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9Mechanical, Packaging, and Orderable Information
    1. 9.1 Tape and Reel 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

7.1.3.2 Power Loss Calculation

For a H-bridge with high-side recirculation, power dissipation for each FET can be approximated as follows:

  • PHS1 = RDS(ON) × IL2

  • PLS1 = 0

  • PHS2 = [RDS(ON) × IL2 x (1-D)] + [2 x VD x IL x tD x fPWM]

  • PLS2 = [RDS(ON) × IL2 x D] + [VM x IL x tRF x fPWM]

For estimating power dissipation for load current flow in the reverse direction, identical equations apply, with only swapping of HS1 with HS2 and LS1 with LS2.

Substituting the following values in the equations above -

  • VM = 24 V

  • IL = 4 A

  • RDS(ON) = 53 mΩ

  • D = 0.5

  • VD = 1 V

  • tD = 300 ns

  • tRF = 70 ns

  • fPWM = 20 kHz

The losses in each FET can be calculated as follows -

PHS1 = 53 mΩ × 42 = 0.848 W

PLS1 = 0

PHS2 = [53 mΩ × 42 x (1-0.5)] + [2 x 1 V x 4 A x 300 ns x 20 KHz] = 0.472 W

PLS2 = [ 53 mΩ × 42 x 0.5] + [24 x 4 A x 70 ns x 20 kHz] = 0.558 W

Quiescent Current Loss PQ = 24 V × 4 mA = 0.096 W

PTOT = 2 x (PHS1 + PLS1 + PHS2 + PLS2) + PQ = 2 x (0.848 + 0 + 0.472 + 0.558) + 0.096 = 3.852 W