JAJSNS6A december   2022  – april 2023 MCF8315A

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    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  Output Stage
      2. 7.3.2  Device Interface
        1. 7.3.2.1 Interface - Control and Monitoring
        2. 7.3.2.2 I2C Interface
      3. 7.3.3  Step-Down Mixed-Mode Buck Regulator
        1. 7.3.3.1 Buck in Inductor Mode
        2. 7.3.3.2 Buck in Resistor mode
        3. 7.3.3.3 Buck Regulator with External LDO
        4. 7.3.3.4 AVDD Power Sequencing from Buck Regulator
        5. 7.3.3.5 Mixed Mode Buck Operation and Control
        6. 7.3.3.6 Buck Under Voltage Protection
        7. 7.3.3.7 Buck Over Current Protection
      4. 7.3.4  AVDD Linear Voltage Regulator
      5. 7.3.5  Charge Pump
      6. 7.3.6  Slew Rate Control
      7. 7.3.7  Cross Conduction (Dead Time)
      8. 7.3.8  Speed Control
        1. 7.3.8.1 Analog Mode Speed Control
        2. 7.3.8.2 PWM Mode Speed Control
        3. 7.3.8.3 I2C based Speed Control
        4. 7.3.8.4 Frequency Mode Speed Control
        5. 7.3.8.5 Speed Profiles
          1. 7.3.8.5.1 Linear Speed Profiles
          2. 7.3.8.5.2 Staircase Speed Profile
          3. 7.3.8.5.3 Forward-Reverse Speed Profile
      9. 7.3.9  Starting the Motor Under Different Initial Conditions
        1. 7.3.9.1 Case 1 – Motor is Stationary
        2. 7.3.9.2 Case 2 – Motor is Spinning in the Forward Direction
        3. 7.3.9.3 Case 3 – Motor is Spinning in the Reverse Direction
      10. 7.3.10 Motor Start Sequence (MSS)
        1. 7.3.10.1 Initial Speed Detect (ISD)
        2. 7.3.10.2 Motor Resynchronization
        3. 7.3.10.3 Reverse Drive
          1. 7.3.10.3.1 Reverse Drive Tuning
        4. 7.3.10.4 Motor Start-up
          1. 7.3.10.4.1 Align
          2. 7.3.10.4.2 Double Align
          3. 7.3.10.4.3 Initial Position Detection (IPD)
            1. 7.3.10.4.3.1 IPD Operation
            2. 7.3.10.4.3.2 IPD Release Mode
            3. 7.3.10.4.3.3 IPD Advance Angle
          4. 7.3.10.4.4 Slow First Cycle Startup
          5. 7.3.10.4.5 Open loop
          6. 7.3.10.4.6 Transition from Open to Closed Loop
      11. 7.3.11 Closed Loop Operation
        1. 7.3.11.1 Closed loop accelerate
        2. 7.3.11.2 Speed PI Control
        3. 7.3.11.3 Current PI Control
        4. 7.3.11.4 Overmodulation
      12. 7.3.12 Motor Parameters
        1. 7.3.12.1 Motor Resistance
        2. 7.3.12.2 Motor Inductance
        3. 7.3.12.3 Motor Back-EMF constant
      13. 7.3.13 Motor Parameter Extraction Tool (MPET)
      14. 7.3.14 Anti-Voltage Surge (AVS)
      15. 7.3.15 Output PWM Switching Frequency
      16. 7.3.16 Active Braking
      17. 7.3.17 PWM Modulation Schemes
      18. 7.3.18 Dead Time Compensation
      19. 7.3.19 Motor Stop Options
        1. 7.3.19.1 Coast (Hi-Z) Mode
        2. 7.3.19.2 Recirculation Mode
        3. 7.3.19.3 Low-Side Braking
        4. 7.3.19.4 High-Side Braking
        5. 7.3.19.5 Active Spin-Down
        6. 7.3.19.6 Align Braking
      20. 7.3.20 FG Configuration
        1. 7.3.20.1 FG Output Frequency
        2. 7.3.20.2 FG Open-Loop and Lock Behavior
      21. 7.3.21 DC Bus Current Limit
      22. 7.3.22 Protections
        1. 7.3.22.1  VM Supply Undervoltage Lockout
        2. 7.3.22.2  AVDD Undervoltage Lockout (AVDD_UV)
        3. 7.3.22.3  BUCK Undervoltage Lockout (BUCK_UV)
        4. 7.3.22.4  VCP Charge Pump Undervoltage Lockout (CPUV)
        5. 7.3.22.5  Overvoltage Protection (OVP)
        6. 7.3.22.6  Overcurrent Protection (OCP)
          1. 7.3.22.6.1 OCP Latched Shutdown (OCP_MODE = 00b)
          2. 7.3.22.6.2 OCP Automatic Retry (OCP_MODE = 01b)
          3. 7.3.22.6.3 OCP Report Only (OCP_MODE = 10b)
          4. 7.3.22.6.4 OCP Disabled (OCP_MODE = 11b)
        7. 7.3.22.7  Buck Overcurrent Protection
        8. 7.3.22.8  Hardware Lock Detection Current Limit (HW_LOCK_ILIMIT)
          1. 7.3.22.8.1 HW_LOCK_ILIMIT Latched Shutdown (HW_LOCK_ILIMIT_MODE = 00xxb)
          2. 7.3.22.8.2 HW_LOCK_ILIMIT Automatic recovery (HW_LOCK_ILIMIT_MODE = 01xxb)
          3. 7.3.22.8.3 HW_LOCK_ILIMIT Report Only (HW_LOCK_ILIMIT_MODE = 1000b)
          4. 7.3.22.8.4 HW_LOCK_ILIMIT Disabled (HW_LOCK_ILIMIT_MODE= 1xx1b)
        9. 7.3.22.9  Thermal Warning (OTW)
        10. 7.3.22.10 Thermal Shutdown (TSD)
        11. 7.3.22.11 Motor Lock (MTR_LCK)
          1. 7.3.22.11.1 MTR_LCK Latched Shutdown (MTR_LCK_MODE = 00xxb)
          2. 7.3.22.11.2 MTR_LCK Automatic Recovery (MTR_LCK_MODE= 01xxb)
          3. 7.3.22.11.3 MTR_LCK Report Only (MTR_LCK_MODE = 1000b)
          4. 7.3.22.11.4 MTR_LCK Disabled (MTR_LCK_MODE = 1xx1b)
        12. 7.3.22.12 Motor Lock Detection
          1. 7.3.22.12.1 Lock 1: Abnormal Speed (ABN_SPEED)
          2. 7.3.22.12.2 Lock 2: Abnormal BEMF (ABN_BEMF)
          3. 7.3.22.12.3 Lock3: No-Motor Fault (NO_MTR)
        13. 7.3.22.13 MPET Faults
        14. 7.3.22.14 IPD Faults
    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 Functionality
      2. 7.5.2 DAC outputs
      3. 7.5.3 Current Sense Output
      4. 7.5.4 Oscillator Source
        1. 7.5.4.1 External Clock Source
      5. 7.5.5 External Watchdog
    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
      2. 7.6.2 I2C Serial Interface
        1. 7.6.2.1 I2C Data Word
        2. 7.6.2.2 I2C Write Transaction
        3. 7.6.2.3 I2C Read Transaction
        4. 7.6.2.4 I2C Communication Protocol Packet Examples
        5. 7.6.2.5 I2C Clock Stretching
        6. 7.6.2.6 CRC Byte Calculation
    7. 7.7 EEPROM (Non-Volatile) Register Map
      1. 7.7.1 Algorithm_Configuration Registers
      2. 7.7.2 Fault_Configuration Registers
      3. 7.7.3 Hardware_Configuration Registers
      4. 7.7.4 Internal_Algorithm_Configuration Registers
    8. 7.8 RAM (Volatile) Register Map
      1. 7.8.1 Fault_Status Registers
      2. 7.8.2 System_Status Registers
      3. 7.8.3 Device_Control Registers
      4. 7.8.4 Algorithm_Control Registers
      5. 7.8.5 Algorithm_Variables Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Speed Input before VM Power-up
      2. 8.2.2 Application Curves
        1. 8.2.2.1 Motor startup
        2. 8.2.2.2 MPET
        3. 8.2.2.3 Dead time compensation
        4. 8.2.2.4 Auto handoff
        5. 8.2.2.5 Motor stop – recirculation mode
        6. 8.2.2.6 Anti voltage surge (AVS)
        7. 8.2.2.7 Real time variable tracking using DACOUT
  10. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
      1. 10.3.1 Power Dissipation
  12. 11Device and Documentation Support
    1. 11.1 サポート・リソース
    2. 11.2 Trademarks
    3. 11.3 静電気放電に関する注意事項
    4. 11.4 用語集
  13. 12Mechanical, Packaging, and Orderable 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

7.3.12.3 Motor Back-EMF constant

The back-EMF constant describes the motor phase-to-neutral back-EMF voltage as a function of the motor speed. For a wye-connected motor, the motor BEMF constant refers to the BEMF as a function of time from the phase output to the center tap, KtPH_N (denoted as KtPH_N in Figure 7-40). For a delta-connected motor, the motor BEMF constant refers to the equivalent phase to center tap in the wye configuration in Figure 7-40.

GUID-8559DDA2-B0DB-45EA-89C2-849DF5D0AB86-low.svgFigure 7-40 Motor back-EMF constant

For both the delta-connected motor and the wye-connected motor, the easy way to get the equivalent KtPH_N is to measure the peak value of BEMF on scope for one electrical cycle between two phase terminals (EPH), and then multiply by time duration of one electrical cycle and in order to convert from phase-to-phase to phase-to-neutral divide by sqrt(3) as shown in Equation 5 .

Equation 5. KtPH_N= 13×EPH×tE

Configure the motor BEMF constant (KtPH_N) to a nearest value from Table 7-4.

Table 7-4 Motor BEMF constant Look-Up Table
MOTOR_BEMF_CONST (HEX)KtPH_N (mV/Hz)MOTOR_BEMF_CONST (HEX)KtPH_N (mV/Hz)MOTOR_BEMF_CONST (HEX)KtPH_N (mV/Hz)MOTOR_BEMF_CONST (HEX)KtPH_N (mV/Hz)
0x00Self Measurement (see Motor Parameter Extraction Tool (MPET)Motor Parameter Extraction Tool (MPET))0x4014.50x8046.50xC0210
0x010.60x4115.00x8147.00xC1220
0x020.70x4215.50x8247.50xC2230
0x030.80x4316.00x8348.00xC3240
0x040.90x4416.50x8448.50xC4250
0x051.00x4517.00x8549.00xC5260
0x061.10x4617.50x8649.50xC6270
0x071.20x4718.00x8750.00xC7280
0x081.30x4818.50x88510xC8290
0x091.40x4919.00x89520xC9300
0x0A1.50x4A19.50x8A530xCA320
0x0B1.60x4B20.00x8B540xCB340
0x0C1.70x4C20.50x8C550xCC360
0x0D1.80x4D21.00x8D560xCD380
0x0E1.90x4E21.50x8E570xCE400
0x0F2.00x4F22.00x8F580xCF420
0x102.20x5022.50x90590xD0440
0x112.40x5123.00x91600xD1460
0x122.60x5223.50x92610xD2480
0x132.80x5324.00x93620xD3500
0x143.00x5424.50x94630xD4520
0x153.20x5525.00x95640xD5540
0x163.40x5625.50x96650xD6560
0x173.60x5726.00x97660xD7580
0x183.80x5826.50x98670xD8600
0x194.00x5927.00x99680xD9620
0x1A4.20x5A27.50x9A690xDA640
0x1B4.40x5B28.00x9B700xDB660
0x1C4.60x5C28.50x9C720xDC680
0x1D4.80x5D29.00x9D740xDD700
0x1E5.00x5E29.50x9E760xDE720
0x1F5.20x5F30.00x9F780xDF740
0x205.40x6030.50xA0800xE0760
0x215.60x6131.00xA1820xE1780
0x225.80x6231.50xA2840xE2800
0x236.00x6332.00xA3860xE3820
0x246.20x6432.50xA4880xE4840
0x256.40x6533.00xA5900xE5860
0x266.60x6633.50xA6920xE6880
0x276.80x6734.00xA7940xE7900
0x287.00x6834.50xA8960xE8920
0x297.20x6935.00xA9980xE9940
0x2A7.40x6A35.50xAA1000xEA960
0x2B7.60x6B36.00xAB1050xEB980
0x2C7.80x6C36.50xAC1100xEC1000
0x2D8.00x6D37.00xAD1150xED1050
0x2E8.20x6E37.50xAE1200xEE1100
0x2F8.40x6F38.00xAF1250xEF1150
0x308.60x7038.50xB01300xF01200
0x318.80x7139.00xB11350xF11250
0x329.00x7239.50xB21400xF21300
0x339.20x7340.00xB31450xF31350
0x349.40x7440.50xB41500xF41400
0x359.60x7541.00xB51550xF51450
0x369.80x7641.50xB61600xF61500
0x3710.00x7742.00xB71650xF71550
0x3810.50x7842.50xB81700xF81600
0x3911.00x7943.00xB91750xF91650
0x3A11.50x7A43.50xBA1800xFA1700
0x3B12.00x7B44.00xBB1850xFB1750
0x3C12.50x7C44.50xBC1900xFC1800
0x3D13.00x7D45.00xBD1950xFD1850
0x3E13.50x7E45.50xBE2000xFE1900
0x3F14.00x7F46.00xBF2050xFF2000