SLLSFU1A December   2023  – July 2024 MCF8315C

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    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 Characteristics of the SDA and SCL bus for Standard and Fast mode
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Output Stage
      2. 6.3.2  Device Interface
        1. 6.3.2.1 Interface - Control and Monitoring
        2. 6.3.2.2 I2C Interface
      3. 6.3.3  Step-Down Mixed-Mode Buck Regulator
        1. 6.3.3.1 Buck in Inductor Mode
        2. 6.3.3.2 Buck in Resistor mode
        3. 6.3.3.3 Buck Regulator with External LDO
        4. 6.3.3.4 AVDD Power Sequencing from Buck Regulator
        5. 6.3.3.5 Mixed Mode Buck Operation and Control
        6. 6.3.3.6 Buck Under Voltage Protection
        7. 6.3.3.7 Buck Over Current Protection
      4. 6.3.4  AVDD Linear Voltage Regulator
      5. 6.3.5  Charge Pump
      6. 6.3.6  Slew Rate Control
      7. 6.3.7  Cross Conduction (Dead Time)
      8. 6.3.8  Motor Control Input Sources
        1. 6.3.8.1 Analog Mode Motor Control
        2. 6.3.8.2 PWM Mode Motor Control
        3. 6.3.8.3 I2C based Motor Control
        4. 6.3.8.4 Frequency Mode Motor Control
        5. 6.3.8.5 Speed Profiles
          1. 6.3.8.5.1 Linear Reference Profiles
          2. 6.3.8.5.2 Staircase Reference Profiles
          3. 6.3.8.5.3 Forward-Reverse Reference Profiles
      9. 6.3.9  Starting the Motor Under Different Initial Conditions
        1. 6.3.9.1 Case 1 – Motor is Stationary
        2. 6.3.9.2 Case 2 – Motor is Spinning in the Forward Direction
        3. 6.3.9.3 Case 3 – Motor is Spinning in the Reverse Direction
      10. 6.3.10 Motor Start Sequence (MSS)
        1. 6.3.10.1 Initial Speed Detect (ISD)
        2. 6.3.10.2 Motor Resynchronization
        3. 6.3.10.3 Reverse Drive
          1. 6.3.10.3.1 Reverse Drive Tuning
      11. 6.3.11 Motor Start-up
        1. 6.3.11.1 Align
        2. 6.3.11.2 Double Align
        3. 6.3.11.3 Initial Position Detection (IPD)
          1. 6.3.11.3.1 IPD Operation
          2. 6.3.11.3.2 IPD Release Mode
          3. 6.3.11.3.3 IPD Advance Angle
        4. 6.3.11.4 Slow First Cycle Start-up
        5. 6.3.11.5 Open loop
        6. 6.3.11.6 Transition from Open to Closed Loop
      12. 6.3.12 Closed Loop Operation
        1. 6.3.12.1 Closed Loop Acceleration/Deceleration Slew Rate
        2. 6.3.12.2 Speed PI Control
        3. 6.3.12.3 Current PI Control
        4. 6.3.12.4 Torque Mode
        5. 6.3.12.5 Overmodulation
      13. 6.3.13 Motor Parameters
        1. 6.3.13.1 Motor Resistance
        2. 6.3.13.2 Motor Inductance
        3. 6.3.13.3 Motor Back-EMF constant
      14. 6.3.14 Motor Parameter Extraction Tool (MPET)
      15. 6.3.15 Anti-Voltage Surge (AVS)
      16. 6.3.16 Active Braking
      17. 6.3.17 Output PWM Switching Frequency
      18. 6.3.18 PWM Modulation Schemes
      19. 6.3.19 Dead Time Compensation
      20. 6.3.20 Motor Stop Options
        1. 6.3.20.1 Coast (Hi-Z) Mode
        2. 6.3.20.2 Low-Side Braking
        3. 6.3.20.3 Active Spin-Down
      21. 6.3.21 FG Configuration
        1. 6.3.21.1 FG Output Frequency
        2. 6.3.21.2 FG during open loop
        3. 6.3.21.3 FG during idle and fault
      22. 6.3.22 DC Bus Current Limit
      23. 6.3.23 Protections
        1. 6.3.23.1  VM Supply Undervoltage Lockout
        2. 6.3.23.2  AVDD Undervoltage Lockout (AVDD_UV)
        3. 6.3.23.3  BUCK Under Voltage Lockout (BUCK_UV)
        4. 6.3.23.4  VCP Charge Pump Undervoltage Lockout (CPUV)
        5. 6.3.23.5  Overvoltage Protection (OVP)
        6. 6.3.23.6  Overcurrent Protection (OCP)
          1. 6.3.23.6.1 OCP Latched Shutdown (OCP_MODE = 00b)
          2. 6.3.23.6.2 OCP Automatic Retry (OCP_MODE = 01b)
        7. 6.3.23.7  Buck Overcurrent Protection
        8. 6.3.23.8  Hardware Lock Detection Current Limit (HW_LOCK_ILIMIT)
          1. 6.3.23.8.1 HW_LOCK_ILIMIT Latched Shutdown (HW_LOCK_ILIMIT_MODE = 00xxb)
          2. 6.3.23.8.2 HW_LOCK_ILIMIT Automatic recovery (HW_LOCK_ILIMIT_MODE = 01xxb)
          3. 6.3.23.8.3 HW_LOCK_ILIMIT Report Only (HW_LOCK_ILIMIT_MODE = 1000b)
          4. 6.3.23.8.4 HW_LOCK_ILIMIT Disabled (HW_LOCK_ILIMIT_MODE= 1xx1b)
        9. 6.3.23.9  Motor Lock (MTR_LCK)
          1. 6.3.23.9.1 MTR_LCK Latched Shutdown (MTR_LCK_MODE = 00xxb)
          2. 6.3.23.9.2 MTR_LCK Automatic Recovery (MTR_LCK_MODE= 01xxb)
          3. 6.3.23.9.3 MTR_LCK Report Only (MTR_LCK_MODE = 1000b)
          4. 6.3.23.9.4 MTR_LCK Disabled (MTR_LCK_MODE = 1xx1b)
        10. 6.3.23.10 Motor Lock Detection
          1. 6.3.23.10.1 Lock 1: Abnormal Speed (ABN_SPEED)
          2. 6.3.23.10.2 Lock 2: Abnormal BEMF (ABN_BEMF)
          3. 6.3.23.10.3 Lock3: No-Motor Fault (NO_MTR)
        11. 6.3.23.11 Minimum VM (undervoltage) Protection
        12. 6.3.23.12 Maximum VM (overvoltage) Protection
        13. 6.3.23.13 MPET Faults
        14. 6.3.23.14 IPD Faults
        15. 6.3.23.15 Thermal Warning (OTW)
        16. 6.3.23.16 Thermal Shutdown (TSD)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Functional Modes
        1. 6.4.1.1 Sleep Mode
        2. 6.4.1.2 Standby Mode
        3. 6.4.1.3 Fault Reset (CLR_FLT)
    5. 6.5 External Interface
      1. 6.5.1 DRVOFF Functionality
      2. 6.5.2 DAC output
      3. 6.5.3 Oscillator Source
        1. 6.5.3.1 External Clock Source
      4. 6.5.4 External Watchdog
    6. 6.6 EEPROM access and I2C interface
      1. 6.6.1 EEPROM Access
        1. 6.6.1.1 EEPROM Write
        2. 6.6.1.2 EEPROM Read
      2. 6.6.2 I2C Serial Interface
        1. 6.6.2.1 I2C Data Word
        2. 6.6.2.2 I2C Write Transaction
        3. 6.6.2.3 I2C Read Transaction
        4. 6.6.2.4 I2C Communication Protocol Packet Examples
        5. 6.6.2.5 I2C Clock Stretching
        6. 6.6.2.6 CRC Byte Calculation
  8. 7 EEPROM (Non-Volatile) Register Map
    1. 7.1 Algorithm_Configuration Registers
    2. 7.2 Fault_Configuration Registers
    3. 7.3 Hardware_Configuration Registers
    4. 7.4 Internal_Algorithm_Configuration Registers
  9. 8 RAM (Volatile) Register Map
    1. 8.1 Fault_Status Registers
    2. 8.2 System_Status Registers
    3. 8.3 Device_Control Registers
    4. 8.4 Algorithm_Control Registers
    5. 8.5 Algorithm_Variables Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Application Curves
        1. 9.2.1.1 Motor startup
        2. 9.2.1.2 MPET
        3. 9.2.1.3 Dead time compensation
        4. 9.2.1.4 Auto handoff
        5. 9.2.1.5 Anti voltage surge (AVS)
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Bulk Capacitance
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Thermal Considerations
        1. 9.4.2.1 Power Dissipation
  11. 10Device and Documentation Support
    1. 10.1 Support Resources
    2. 10.2 Trademarks
    3. 10.3 Electrostatic Discharge Caution
    4. 10.4 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
6.3.8.5.1 Linear Reference Profiles
Note:
  1. For all types of reference profiles, a zero input reference (0-V in analog mode, 0% duty in PWM mode, DIGITAL_SPEED_CTRL = 0b I2C mode or 0-Hz in frequency mode) stops the motor irrespective of the reference profile configuration.
  2. The reference value in Figure 6-19, Figure 6-20 and Figure 6-21 is decided by control mode (SPEED_LOOP_DIS) as follows,
    • Speed control mode (SPEED_LOOP_DIS = 0b): SPEED_REF (Hz) = (REF_x/255) x MAX_SPEED (Hz)
    • Current control mode (SPEED_LOOP_DIS = 1b): CURRENT_REF (A) = (REF_x/255) x ILIMIT (A)
MCF8315C Linear Reference Profiles Figure 6-19 Linear Reference Profiles

Linear reference profiles can be configured by setting REF_PROFILE_CONFIG to 01b. Linear profiles feature input references (SPEED_REF or CURRENT_REF) which change linearly between REF_CLAMP1 and REF_CLAMP2 with different slopes which can be set by configuring DUTY_x and REF_x.

  • DUTY_OFF1 configures the duty command below which the reference will be REF_OFF1.
  • DUTY_OFF1 and DUTY_ON1 configure a hysteresis between reference levels, REF_CLAMP1 and REF_OFF1 as shown in Figure 6-19.
  • DUTY_CLAMP1 configures the duty command till which reference will be constant with a value REF_CLAMP1. DUTY_CLAMP1 can be placed anywhere between DUTY_ON1 and DUTY_A.
  • DUTY_A configures the duty command for reference REF_A. The reference changes from REF_CLAMP1 to REF_A linearly between DUTY_CLAMP1 and DUTY_A. DUTY_A to DUTY_E has to be in the same order as shown in Figure 6-19.
  • DUTY_B configures the duty command for reference REF_B. The reference changes linearly between DUTY_A and DUTY_B.
  • DUTY_C configures the duty command for reference REF_C. The reference changes linearly between DUTY_B and DUTY_C.
  • DUTY_D configures the duty command for reference REF_D. The reference changes linearly between DUTY_C and DUTY_D.
  • DUTY_E configures the duty command for reference REF_E. The reference changes linearly between DUTY_D and DUTY_E.
  • DUTY_CLAMP2 configures the duty command above which the reference will be constant at REF_CLAMP2. REF_CLAMP2 configures this constant reference between DUTY_CLAMP2 and DUTY_OFF2 . The reference changes linearly between DUTY_E and DUTY_CLAMP2. DUTY_CLAMP2 can be placed anywhere between DUTY_E and DUTY_ON2.
  • DUTY_OFF2 and DUTY_ON2 configure a hysteresis between reference levels REF_CLAMP2 and REF_OFF2 as shown in Figure 6-19.
  • DUTY_OFF2 configures the duty command above which the reference will change from REF_CLAMP2 to REF_OFF2.