SLLSFQ2 January   2023 MCT8317A

ADVANCE INFORMATION  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Characteristics of the SDA and SCL bus for Standard and Fast mode
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Output Stage
      2. 8.3.2  Device Interface
        1. 8.3.2.1 Interface - Control and Monitoring
        2. 8.3.2.2 I2C Interface
      3. 8.3.3  AVDD Linear Voltage Regulator
      4. 8.3.4  Charge Pump
      5. 8.3.5  Slew Rate Control
      6. 8.3.6  Cross Conduction (Dead Time)
      7. 8.3.7  Motor Control Input Options
        1. 8.3.7.1 Analog Mode Speed Control
        2. 8.3.7.2 PWM-Mode Speed Control
        3. 8.3.7.3 I2C based Speed Control
        4. 8.3.7.4 Frequency-Mode Speed Control
        5. 8.3.7.5 Reference Profiles
          1. 8.3.7.5.1 Linear Reference Profile
          2. 8.3.7.5.2 Staircase Reference Profile
          3. 8.3.7.5.3 Forward-Reverse Reference Profile
      8. 8.3.8  Starting the Motor Under Different Initial Conditions
        1. 8.3.8.1 Case 1 – Motor is Stationary
        2. 8.3.8.2 Case 2 – Motor is Spinning in the Forward Direction
        3. 8.3.8.3 Case 3 – Motor is Spinning in the Reverse Direction
      9. 8.3.9  Motor Start Sequence (MSS)
        1. 8.3.9.1 Initial Speed Detect (ISD)
        2. 8.3.9.2 Motor Resynchronization
        3. 8.3.9.3 Reverse Drive
        4. 8.3.9.4 Motor Start-up
          1. 8.3.9.4.1 Align
          2. 8.3.9.4.2 Double Align
          3. 8.3.9.4.3 Initial Position Detection (IPD)
            1. 8.3.9.4.3.1 IPD Operation
            2. 8.3.9.4.3.2 IPD Release Mode
            3. 8.3.9.4.3.3 IPD Advance Angle
          4. 8.3.9.4.4 Slow First Cycle Startup
          5. 8.3.9.4.5 Open loop
          6. 8.3.9.4.6 Transition from Open to Closed Loop
      10. 8.3.10 Closed Loop Operation
        1. 8.3.10.1 120o Commutation
          1. 8.3.10.1.1 High-Side Modulation
          2. 8.3.10.1.2 Low-Side Modulation
          3. 8.3.10.1.3 Mixed Modulation
        2. 8.3.10.2 Variable Commutation
        3. 8.3.10.3 Lead Angle Control
        4. 8.3.10.4 Closed loop accelerate
      11. 8.3.11 Speed Loop
      12. 8.3.12 Input Power Regulation
      13. 8.3.13 Anti-Voltage Surge (AVS)
      14. 8.3.14 Output PWM Switching Frequency
      15. 8.3.15 Fast Start-up (< 50 ms)
        1. 8.3.15.1 BEMF Threshold
        2. 8.3.15.2 Dynamic Degauss
      16. 8.3.16 Fast Deceleration
      17. 8.3.17 Motor Stop Options
        1. 8.3.17.1 Coast (Hi-Z) Mode
        2. 8.3.17.2 Recirculation Mode
        3. 8.3.17.3 Low-Side Braking
        4. 8.3.17.4 High-Side Braking
        5. 8.3.17.5 Active Spin-Down
      18. 8.3.18 FG Configuration
        1. 8.3.18.1 FG Output Frequency
        2. 8.3.18.2 FG Open-Loop and Lock Behavior
      19. 8.3.19 Protections
        1. 8.3.19.1  VM Supply Undervoltage Lockout
        2. 8.3.19.2  VIN_AVDD Undervoltage Lockout (VIN_AVDD_UV)
        3. 8.3.19.3  AVDD Undervoltage Lockout (AVDD_UV)
        4. 8.3.19.4  Charge Pump Undervoltage Lockout (CP_UV)
        5. 8.3.19.5  Overvoltage Protection (OVP)
        6. 8.3.19.6  Overcurrent Protection (OCP)
          1. 8.3.19.6.1 OCP Latched Shutdown (OCP_MODE = 010b)
          2. 8.3.19.6.2 OCP Automatic Retry (OCP_MODE = 000b)
          3. 8.3.19.6.3 OCP Report Only (OCP_MODE = 011b)
          4. 8.3.19.6.4 OCP Disabled (OCP_MODE = 111b)
        7. 8.3.19.7  Cycle-by-Cycle (CBC) Current Limit (CBC_ILIMIT)
          1. 8.3.19.7.1 CBC_ILIMIT Automatic Recovery next PWM Cycle (CBC_ILIMIT_MODE = 000xb)
          2. 8.3.19.7.2 CBC_ILIMIT Automatic Recovery Threshold Based (CBC_ILIMIT_MODE = 001xb)
          3. 8.3.19.7.3 CBC_ILIMIT Automatic Recovery after 'n' PWM Cycles (CBC_ILIMIT_MODE = 010xb)
          4. 8.3.19.7.4 CBC_ILIMIT Report Only (CBC_ILIMIT_MODE = 0110b)
          5. 8.3.19.7.5 CBC_ILIMIT Disabled (CBC_ILIMIT_MODE = 0111b or 1xxxb)
        8. 8.3.19.8  Lock Detection Current Limit (LOCK_ILIMIT)
          1. 8.3.19.8.1 LOCK_ILIMIT Latched Shutdown (LOCK_ILIMIT_MODE = 00xxb)
          2. 8.3.19.8.2 LOCK_ILIMIT Automatic Recovery (LOCK_ILIMIT_MODE = 01xxb)
          3. 8.3.19.8.3 LOCK_ILIMIT Report Only (LOCK_ILIMIT_MODE = 1000b)
          4. 8.3.19.8.4 LOCK_ILIMIT Disabled (LOCK_ILIMIT_MODE = 1xx1b)
        9. 8.3.19.9  Over Temperature Warning (OTW)
        10. 8.3.19.10 Over Temperature Shutdown (OTS)
        11. 8.3.19.11 Motor Lock (MTR_LCK)
          1. 8.3.19.11.1 MTR_LCK Latched Shutdown (MTR_LCK_MODE = 00xxb)
          2. 8.3.19.11.2 MTR_LCK Automatic Recovery (MTR_LCK_MODE= 01xxb)
          3. 8.3.19.11.3 MTR_LCK Report Only (MTR_LCK_MODE = 1000b)
          4. 8.3.19.11.4 MTR_LCK Disabled (MTR_LCK_MODE = 1xx1b)
        12. 8.3.19.12 Motor Lock Detection
          1. 8.3.19.12.1 Lock 1: Abnormal Speed (ABN_SPEED)
          2. 8.3.19.12.2 Lock 2: Loss of Sync (LOSS_OF_SYNC)
          3. 8.3.19.12.3 Lock3: No-Motor Fault (NO_MTR)
        13. 8.3.19.13 IPD Faults
    4. 8.4 Device Functional Modes
      1. 8.4.1 Functional Modes
        1. 8.4.1.1 Sleep Mode
        2. 8.4.1.2 Standby Mode
        3. 8.4.1.3 Fault Reset (CLR_FLT)
    5. 8.5 External Interface
      1. 8.5.1 DAC outputs
      2. 8.5.2 SOX Output
      3. 8.5.3 Oscillator Source
        1. 8.5.3.1 External Clock Source
      4. 8.5.4 External Watchdog
    6. 8.6 EEPROM access and I2C interface
      1. 8.6.1 EEPROM Access
        1. 8.6.1.1 EEPROM Write
        2. 8.6.1.2 EEPROM Read
      2. 8.6.2 I2C Serial Interface
        1. 8.6.2.1 I2C Data Word
        2. 8.6.2.2 I2C Write Operation
        3. 8.6.2.3 I2C Read Operation
        4. 8.6.2.4 Examples of MCT8317A I2C Communication Protocol Packets
        5. 8.6.2.5 Internal Buffers
        6. 8.6.2.6 CRC Byte Calculation
    7. 8.7 EEPROM (Non-Volatile) Register Map
      1. 8.7.1 Algorithm_Configuration Registers
      2. 8.7.2 Fault_Configuration Registers
      3. 8.7.3 Hardware_Configuration Registers
      4. 8.7.4 Gate_Driver_Configuration Registers
    8. 8.8 RAM (Volatile) Register Map
      1. 8.8.1 Fault_Status Registers
      2. 8.8.2 System_Status Registers
      3. 8.8.3 Algo_Control Registers
      4. 8.8.4 Device_Control Registers
      5. 8.8.5 Algorithm_Variables Registers
  9. 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 120o and variable commutation
        3. 9.2.1.3 Faster startup time
        4. 9.2.1.4 Setting the BEMF threshold
        5. 9.2.1.5 Maximum speed
        6. 9.2.1.6 Faster deceleration
  10. 10Power Supply Recommendations
    1. 10.1 Bulk Capacitance
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
      1. 11.3.1 Power Dissipation
  12. 12Device and Documentation Support
    1. 12.1 Support Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
  • REE|36
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Three-phase BLDC motor driver with integrated sensorless motor control algorithm
    • Code-free high speed Trapezoidal Control
    • Supports up to 3 kHz (electrical frequency)
    • Very fast start-up time (< 50 ms)
    • Fast Deceleration (< 150 ms)
    • Supports 120° or 150° modulation to improve acoustic performance
    • Closed loop speed or power control
    • Configurable profiles for speed or power input reference
    • Windmilling support through forward resynchronization and reverse drive
    • Analog, PWM, freq. or I2C based speed input
    • Configurable motor start-up and stop options
    • Anti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration
    • Variable monitoring through DACOUT
  • 4.5- to 20-V operating voltage (24-V abs max)
  • High output current capability: 5-A peak
  • Low MOSFET on-state resistance
    • RDS(ON) (HS + LS) at TA = 25°C : 130-mΩ
  • Low power sleep mode
    • 7-µA (maximum) at VVM = 12-V, TA = 25°C
  • Speed loop accuracy: 3% with internal clock and 1% with external clock reference
  • Supports up to 100-kHz PWM frequency for low inductance motor support
  • Does not require external current sense resistor
  • Built-in 3.3-V ±5%, 20-mA LDO regulator
  • Spread spectrum and slew rate for EMI mitigation
  • Suite of Integrated protection features
    • Supply under voltage lockout (UVLO)
    • Motor lock detection (5 different types)
    • Over current protection (OCP)
    • Over temperature warning and shutdown (OTW/OTS)
    • Fault condition indication pin (nFAULT)
    • Optional fault diagnostics over I2C interface