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

3.5 Limiting and Regulating Supply Power

MCF8329HS provides options to limit and regulate supply power. This feature can be utilized in battery powered motor driver applications such as cordless vacuum cleaners, power tools etc.

Use the following steps to limit supply power. In this mode, supply power is only limited to reference power and not actively regulated.

  1. Configure CTRL_MODE to power control (1b).
  2. Configure MAX_POWER. This sets the maximum power that MCF8329HS can draw from the DC input supply at 100% duty command. For example, if MAX_POWER is configured to 25 W, MCF8329HS draws 12.5 W from power supply at 50% duty command.
  3. The power control loop uses the same PI controller parameters as in the speed loop mode. Kp and Ki coefficients are configured through SPD_POWER_KP and SPD_POWER_KI. Tuning SPD_POWER_KP and SPD_POWER_KI is experimental. The recommendation is to manually tune both parameters until the desired results are achieved.
Power Control Settings Figure 3-9 Power Control Settings