SLVSH86A December   2023  – June 2024 MCT8314Z

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 SPI Timing Requirements
    7. 6.7 SPI Secondary Device Mode Timings
    8. 6.8 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  PWM Control Mode (1x PWM Mode)
        1. 7.3.2.1 Analog Hall Input Configuration
        2. 7.3.2.2 Digital Hall Input Configuration
        3. 7.3.2.3 Asynchronous Modulation
        4. 7.3.2.4 Synchronous Modulation
        5. 7.3.2.5 Motor Operation
      3. 7.3.3  Device Interface Modes
        1. 7.3.3.1 Serial Peripheral Interface (SPI)
        2. 7.3.3.2 Hardware Interface
      4. 7.3.4  AVDD Linear Voltage Regulator
      5. 7.3.5  Charge Pump
      6. 7.3.6  Slew Rate
      7. 7.3.7  Cross Conduction (Dead Time)
      8. 7.3.8  Propagation Delay
      9. 7.3.9  Pin Diagrams
        1. 7.3.9.1 Logic Level Input Pin (Internal Pulldown)
        2. 7.3.9.2 Logic Level Input Pin (Internal Pullup)
        3. 7.3.9.3 Open Drain Pin
        4. 7.3.9.4 Push Pull Pin
        5. 7.3.9.5 Seven Level Input Pin
      10. 7.3.10 Automatic Synchronous Rectification Mode (ASR Mode)
      11. 7.3.11 Cycle-by-Cycle Current Limit
        1. 7.3.11.1 Cycle by Cycle Current Limit with 100% Duty Cycle Input
      12. 7.3.12 Hall Comparators (Analog Hall Inputs)
      13. 7.3.13 Advance Angle
      14. 7.3.14 FG Signal
      15. 7.3.15 Protections
        1. 7.3.15.1 VM Supply Undervoltage Lockout (NPOR)
        2. 7.3.15.2 AVDD Undervoltage Lockout (AVDD_UV)
        3. 7.3.15.3 VCP Charge Pump Undervoltage Lockout (CPUV)
        4. 7.3.15.4 Overvoltage Protections (OVP)
        5. 7.3.15.5 Overcurrent Protection (OCP)
          1. 7.3.15.5.1 OCP Latched Shutdown (OCP_MODE = 00b or MCT8314ZH)
          2. 7.3.15.5.2 OCP Automatic Retry (OCP_MODE = 01b)
          3. 7.3.15.5.3 OCP Report Only (OCP_MODE = 10b)
          4. 7.3.15.5.4 OCP Disabled (OCP_MODE = 11b)
        6. 7.3.15.6 Motor Lock (MTR_LOCK)
          1. 7.3.15.6.1 MTR_LOCK Latched Shutdown (MTR_LOCK_MODE = 00b)
          2. 7.3.15.6.2 MTR_LOCK Automatic Retry (MTR_LOCK_MODE = 01b or MCT8314ZH)
          3. 7.3.15.6.3 MTR_LOCK Report Only (MTR_LOCK_MODE= 10b)
          4. 7.3.15.6.4 MTR_LOCK Disabled (MTR_LOCK_MODE = 11b)
        7. 7.3.15.7 Thermal Warning (OTW)
        8. 7.3.15.8 Thermal Shutdown (OTS)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Functional Modes
        1. 7.4.1.1 Sleep Mode
        2. 7.4.1.2 Operating Mode
        3. 7.4.1.3 Fault Reset (CLR_FLT or nSLEEP Reset Pulse)
    5. 7.5 SPI Communication
      1. 7.5.1 Programming
        1. 7.5.1.1 SPI Format
  9. 8 Register Map
    1. 8.1 STATUS Registers
    2. 8.2 CONTROL Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Hall Sensor Configuration and Connection
      1. 9.2.1 Typical Configuration
      2. 9.2.2 Open Drain Configuration
      3. 9.2.3 Series Configuration
      4. 9.2.4 Parallel Configuration
    3. 9.3 Typical Applications
      1. 9.3.1 Three-Phase Brushless-DC Motor Control With Current Limit
        1. 9.3.1.1 Detailed Design Procedure
          1. 9.3.1.1.1 Motor Voltage
          2. 9.3.1.1.2 Using Automatic Synchronous Rectification Mode (ASR Mode)
          3. 9.3.1.1.3 Power Dissipation and Junction Temperature Losses
        2. 9.3.1.2 Application Curves
    4. 9.4 Power Supply Recommendations
      1. 9.4.1 Bulk Capacitance
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
      3. 9.5.3 Thermal Considerations
        1. 9.5.3.1 Power Dissipation
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Package Option Addendum
    2. 12.2 Tape and Reel Information

Package Options

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

7.3.15 Protections

The MCT8314Z family of devices is protected against VM undervoltage, charge pump undervoltage, and overcurrent events. Table 7-7 summarizes various faults details.

Table 7-7 Fault Action and Response
FAULTCONDITIONCONFIGURATIONREPORTH-BRIDGELOGICRECOVERY
VM undervoltage
(NPOR)		VVM < VUVLODevice default—Hi-ZDisabledAutomatic:
VVM > VUVLO_R
CLR_FLT, nSLEEP Reset Pulse (NPOR bit)
AVDD undervoltage
(NPOR)		VAVDD < VAVDD_UVDevice default—Hi-ZDisabledAutomatic:
VAVDD > VAVDD_UV_R
CLR_FLT, nSLEEP Reset Pulse (NPOR bit)
Charge pump undervoltage
(VCP_UV)		VCP < VCPUVDevice defaultnFAULTHi-ZActiveAutomatic:
VVCP > VCPUV
CLR_FLT, nSLEEP Reset Pulse (VCP_UV bit)
Overvoltage Protection
(OVP)		VVM > VOVPOVP_EN = 0bNoneActiveActiveNo action (OVP Disabled)
OVP_EN = 1b, HW device defaultFAULTHi-ZActiveAutomatic:
VVM < VOVP
CLR_FLT, nSLEEP Reset Pulse (OVP bit)
Overcurrent Protection
(OCP)		IPHASE > IOCPOCP_MODE = 00b, HW device defaultnFAULTHi-ZActiveLatched:
CLR_FLT, nSLEEP Reset Pulse (OCP bits)
OCP_MODE = 01bnFAULTHi-ZActiveRetry:
tRETRY
OCP_MODE = 10bnFAULTActiveActiveAutomatic:
CLR_FLT, nSLEEP Reset Pulse (OCP bits)
OCP_MODE = 11bNoneActiveActiveNo action
SPI Error
(SPI_FLT)		SCLK fault and ADDR faultSPI_FLT_REP = 0bnFAULTActiveActiveAutomatic:
CLR_FLT, nSLEEP Reset Pulse (SPI_FLT bit)
SPI_FLT_REP = 1bNoneActiveActiveNo action
OTP Error
(OTP_ERR)		OTP reading is erroneousDevice defaultnFAULTHi-ZActiveLatched:
Power Cycle, nSLEEP Reset Pulse
Motor Lock
(MTR_LOCK)		 No Hall Signals > tMTR_LOCK_TDET MTR_LOCK_MODE = 00b nFAULT Hi-Z Active Latched:
CLR_FLT, nSLEEP Pulse (MTR_LOCK bit)
MTR_LOCK_MODE = 01b, HW device default nFAULT Hi-Z Active Retry:
tMTR_LOCK_RETRY
MTR_LOCK_MODE = 10b nFAULT Active Active Automatic:
CLR_FLT, nSLEEP Reset Pulse (OCP bits)
MTR_LOCK_MODE = 11b None Active Active No action
Thermal warning
(OTW)		TJ > TOTWOTW_REP = 0bNoneActiveActiveNo action
OTW_REP = 1b, HW device defaultnFAULTActiveActiveAutomatic:
TJ < TOTW – TOTW_HYS
CLR_FLT, nSLEEP Pulse (OTW bit)
Thermal shutdown
(OTSD_FET)		TJ > TTSD_FETDevice defaultnFAULTHi-ZActiveAutomatic:
TJ < TTSD_FET – TTSD_FET_HYS
CLR_FLT, nSLEEP Pulse (OTS bit)