SLUUDH9 April   2026 MCF8329HS-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Spinning the motor
    1. 2.1 Connecting to the GUI
    2. 2.2 SmartTune
      1. 2.2.1 SmartTune Execution
    3. 2.3 Manual Tuning
      1. 2.3.1 Loading Recommended Default Values
      2. 2.3.2 Setting Base Current
      3. 2.3.3 Setting Current Limits
      4. 2.3.4 Setting Voltage Limits
      5. 2.3.5 Maximum Electrical Speed (Hz)
      6. 2.3.6 Input the Motor's Phase Resistance, Inductance and BEMF Constant
      7. 2.3.7 Speed loop Manual Tuning
    4. 2.4 Testing for Successful Startup Into Closed Loop
  6. 3Basic Controls
    1. 3.1 Speed Input Mode
    2. 3.2 Preventing Back Spin of Rotor During Startup
    3. 3.3 Faster Startup Timing
    4. 3.4 Improving Current and Speed Regulation
    5. 3.5 Limiting and Regulating Supply Power
    6. 3.6 MTPA Tuning
    7. 3.7 Motor Studio Optimization Wizards
  7. 4Fault Handling
    1. 4.1 Abnormal BEMF Fault [ABN_BEMF]
    2. 4.2 Lock Current Limit [LOCK_LIMIT]
    3. 4.3 Hardware Lock Current Limit [HW_LOCK_LIMIT]
    4. 4.4 No Motor Fault [NO_MTR]
    5. 4.5 Abnormal Speed [ABN_SPEED]
  8. 5Hardware Design and Setup
    1. 5.1 Board Design
      1. 5.1.1 External MOSFET Selection
      2. 5.1.2 Gate Resistor Selection
      3. 5.1.3 Bootstrap and GVDD Capacitor Selection
      4. 5.1.4 Current Shunt Resistor Selection
      5. 5.1.5 VREG MOSFET Selection
      6. 5.1.6 Additional External Power Stage Components

5.1.3 Bootstrap and GVDD Capacitor Selection

The bootstrap and GVDD capacitors must both be sized appropriately to maintain the bootstrap voltage above the under-voltage lockout threshold during normal operation. For instructions to determine an appropriate capacitance for both the bootstrap capacitors and GVDD capacitor, see the Bootstrap Capacitor and GVDD Capacitor Selection sections of the MCF8329HS Sensorless Field Oriented Control (FOC) Three-phase BLDC Gate Driver Data Sheet.