SLLSFZ8 November   2025 MCF8329HS-Q1

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 Auto
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Characteristics of the SDA and SCL bus for Standard and Fast mode
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Three Phase BLDC Gate Drivers
      2. 7.3.2  Gate Drive Architecture
        1. 7.3.2.1 Dead time and Cross Conduction Prevention
      3. 7.3.3  AVDD Linear Voltage Regulator
      4. 7.3.4  Low-Side Current Sense Amplifier
      5. 7.3.5  Device Interface Modes
        1. 7.3.5.1 Interface - Control and Monitoring
        2. 7.3.5.2 I2C Interface
      6. 7.3.6  Motor Control Input Options
        1. 7.3.6.1 Analog-Mode Motor Control
        2. 7.3.6.2 PWM-Mode Motor Control
        3. 7.3.6.3 Frequency-Mode Motor Control
        4. 7.3.6.4 I2C based Motor Control
        5. 7.3.6.5 Input Control Signal Profiles
          1. 7.3.6.5.1 Linear Control Profiles
          2. 7.3.6.5.2 Staircase Control Profiles
          3. 7.3.6.5.3 Forward-Reverse Profiles
          4. 7.3.6.5.4 Multi-Reference Mode Operation
          5. 7.3.6.5.5 Input Reference Transfer Function without Profiler
      7. 7.3.7  Bootstrap Capacitor Initial Charging
      8. 7.3.8  Starting the Motor Under Different Initial Conditions
        1. 7.3.8.1 Case 1 – Motor is Stationary
        2. 7.3.8.2 Case 2 – Motor is Spinning in the Forward Direction
        3. 7.3.8.3 Case 3 – Motor is Spinning in the Reverse Direction
      9. 7.3.9  Motor Start Sequence (MSS)
        1. 7.3.9.1 Initial Speed Detect (ISD)
        2. 7.3.9.2 Motor Resynchronization
        3. 7.3.9.3 Reverse Drive
          1. 7.3.9.3.1 Reverse Drive Tuning
        4. 7.3.9.4 Motor Start-up
          1. 7.3.9.4.1 Align
          2. 7.3.9.4.2 Double Align
          3. 7.3.9.4.3 Initial Position Detection (IPD)
            1. 7.3.9.4.3.1 IPD Operation
            2. 7.3.9.4.3.2 IPD Release
            3. 7.3.9.4.3.3 IPD Advance Angle
          4. 7.3.9.4.4 Slow First Cycle Startup
          5. 7.3.9.4.5 Open Loop
          6. 7.3.9.4.6 Transition from Open to Closed Loop
      10. 7.3.10 Closed Loop Operation
        1. 7.3.10.1 Closed loop accelerate
        2. 7.3.10.2 Speed PI Control
        3. 7.3.10.3 Current PI Control
        4. 7.3.10.4 Overmodulation
        5. 7.3.10.5 Power Loop
        6. 7.3.10.6 Modulation Index Control
        7. 7.3.10.7 Motor Speed Limit
        8. 7.3.10.8 Input DC Power Limit
      11. 7.3.11 Maximum Torque Per Ampere (MTPA) Control
      12. 7.3.12 Flux Weakening Control
      13. 7.3.13 Motor Parameters
        1. 7.3.13.1 Motor Resistance
        2. 7.3.13.2 Motor Inductance
        3. 7.3.13.3 Motor Back-EMF constant
      14. 7.3.14 Motor Parameter Extraction Tool (MPET)
      15. 7.3.15 Single Hall Sensor Operation
      16. 7.3.16 Anti-Voltage Surge (AVS)
      17. 7.3.17 Active Braking
      18. 7.3.18 Output PWM Switching Frequency
      19. 7.3.19 Dead Time Compensation
      20. 7.3.20 Voltage Sense Scaling
      21. 7.3.21 Motor Stop Options
        1. 7.3.21.1 Coast (Hi-Z) Mode
        2. 7.3.21.2 Recirculation Mode
        3. 7.3.21.3 Low-Side Braking
        4. 7.3.21.4 Active Spin-Down
      22. 7.3.22 FG Configuration
        1. 7.3.22.1 FG Output Frequency
        2. 7.3.22.2 FG in Open-Loop
        3. 7.3.22.3 FG During Motor Stop
        4. 7.3.22.4 FG Behavior During Fault
      23. 7.3.23 Protections
        1. 7.3.23.1  PVDD Supply Undervoltage Lockout (PVDD_UV)
        2. 7.3.23.2  AVDD Power on Reset (AVDD_POR)
        3. 7.3.23.3  GVDD Undervoltage Lockout (GVDD_UV)
        4. 7.3.23.4  BST Undervoltage Lockout (BST_UV)
        5. 7.3.23.5  MOSFET VDS Overcurrent Protection (VDS_OCP)
        6. 7.3.23.6  VSENSE Overcurrent Protection (SEN_OCP)
        7. 7.3.23.7  Thermal Shutdown (OTSD)
        8. 7.3.23.8  Hardware Lock Detection Current Limit (HW_LOCK_ILIMIT)
          1. 7.3.23.8.1 HW_LOCK_ILIMIT Latched Shutdown (HW_LOCK_ILIMIT_MODE = 00xb or 010b)
          2. 7.3.23.8.2 HW_LOCK_ILIMIT Automatic recovery (HW_LOCK_ILIMIT_MODE = 011b or 10xb)
          3. 7.3.23.8.3 HW_LOCK_ILIMIT Report Only (HW_LOCK_ILIMIT_MODE = 110b)
          4. 7.3.23.8.4 HW_LOCK_ILIMIT Disabled (HW_LOCK_ILIMIT_MODE = 111b)
        9. 7.3.23.9  Lock Detection Current Limit (LOCK_ILIMIT)
          1. 7.3.23.9.1 LOCK_ILIMIT Latched Shutdown (LOCK_ILIMIT_MODE = 00xb or 010b)
          2. 7.3.23.9.2 LOCK_ILIMIT Automatic Recovery (LOCK_ILIMIT_MODE = 011b or 10xb)
          3. 7.3.23.9.3 LOCK_ILIMIT Report Only (LOCK_ILIMIT_MODE = 110b)
          4. 7.3.23.9.4 LOCK_ILIMIT Disabled (LOCK_ILIMIT_MODE = 111b)
        10. 7.3.23.10 Motor Lock (MTR_LCK)
          1. 7.3.23.10.1 MTR_LCK Latched Shutdown (MTR_LCK_MODE = 00xb or 010b)
          2. 7.3.23.10.2 MTR_LCK Automatic Recovery (MTR_LCK_MODE = 011b or 10xb)
          3. 7.3.23.10.3 MTR_LCK Report Only (MTR_LCK_MODE = 110b)
          4. 7.3.23.10.4 MTR_LCK Disabled (MTR_LCK_MODE = 111b)
        11. 7.3.23.11 Motor Lock Detection
          1. 7.3.23.11.1 Lock 1: Abnormal Speed (ABN_SPEED)
          2. 7.3.23.11.2 Lock 2: Abnormal BEMF (ABN_BEMF)
          3. 7.3.23.11.3 Lock3: No-Motor Fault (NO_MTR)
        12. 7.3.23.12 MPET Faults
        13. 7.3.23.13 IPD Faults
        14. 7.3.23.14 Dry Run Detection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Functional Modes
        1. 7.4.1.1 Sleep Mode
        2. 7.4.1.2 Standby Mode
        3. 7.4.1.3 Fault Reset (CLR_FLT)
    5. 7.5 External Interface
      1. 7.5.1 DRVOFF - Gate Driver Shutdown Functionality
      2. 7.5.2 Oscillator Source
      3. 7.5.3 External Watchdog with MCU Reset
    6. 7.6 EEPROM access and I2C interface
      1. 7.6.1 EEPROM Access
        1. 7.6.1.1 EEPROM Write
        2. 7.6.1.2 EEPROM Read
        3. 7.6.1.3 EEPROM Security
      2. 7.6.2 I2C Serial Interface
        1. 7.6.2.1 I2C Data Word
        2. 7.6.2.2 I2C Write Operation
        3. 7.6.2.3 I2C Read Operation
        4. 7.6.2.4 Examples of I2C Communication Protocol Packets
        5. 7.6.2.5 Internal Buffers
        6. 7.6.2.6 CRC Byte Calculation
  9. 8 EEPROM (Non-Volatile) Register Map
    1. 8.1 Algorithm_Configuration Registers
    2. 8.2 Fault_Configuration Registers
    3. 8.3 Hardware_Configuration Registers
    4. 8.4 Internal_Algorithm_Configuration Registers
  10. 9 RAM (Volatile) Register Map
    1. 9.1 Fault_Status Registers
    2. 9.2 System_Status Registers
    3. 9.3 Algorithm_Control Registers
    4. 9.4 Device_Control Registers
    5. 9.5 Algorithm_Variables Registers
  11. 10Typical Applications
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1.      Detailed Design Procedure
      2.      Bootstrap Capacitor and GVDD Capacitor Selection
      3.      Gate Drive Current
      4.      Gate Resistor Selection
      5.      System Considerations in High Power Designs
      6.      Capacitor Voltage Ratings
      7.      External Power Stage Components
    3. 10.3 Power Supply Recommendations
      1. 10.3.1 Bulk Capacitance
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
      3. 10.4.3 Thermal Considerations
        1. 10.4.3.1 Power Dissipation
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  13. 12Mechanical, Packaging, and Orderable Information

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7.3.11 Maximum Torque Per Ampere (MTPA) Control

PMSM or BLDC motors with magnetic saliency produces a reluctance torque from the difference between the direct-d axis inductance and the quadrature q-axis inductance. The maximum efficiency of the IPM motors can be achieved by proper selection of the current vector ratio between magnetic torque current and reluctance torque current in the total current. MCF8329HS-Q1 provides the maximum torque per ampere control and in that, for a given bus current, it is possible to obtain the best torque performance by setting the d axis current reference as a function of the q axis current reference as per the equation below.

Equation 10. id_MTPA=ψm2Lq-Ld1-1+4Lq-Ld2iq2

Ld and Lq are inductance of the d and q axis respectively. iq is the Q-axis current and ψm is the BEMF constant. In case of motors without saliency in the rotor, the inductances of d and q axis are the same and hence the point of maximum torque is always the one where d-axis current reference is 0. For motors with saliency, the d-axis reference can be set as a function of the q-axis reference as derived in the equation above so as to generate the maximum torque for any current drawn from the DC bus.