SLVSH53 December   2023 MCT8315Z

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 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 SPI Timing Requirements
    7. 7.7 SPI Secondary Device Mode Timings
    8. 7.8 Typical Characteristics
  9. 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  PWM Control Mode (1x PWM Mode)
        1. 8.3.2.1 Analog Hall Input Configuration
        2. 8.3.2.2 Digital Hall Input Configuration
        3. 8.3.2.3 Asynchronous Modulation
        4. 8.3.2.4 Synchronous Modulation
        5. 8.3.2.5 Motor Operation
      3. 8.3.3  Device Interface Modes
        1. 8.3.3.1 Serial Peripheral Interface (SPI)
        2. 8.3.3.2 Hardware Interface
      4. 8.3.4  Step-Down Mixed-Mode Buck Regulator
        1. 8.3.4.1 Buck in Inductor Mode
        2. 8.3.4.2 Buck in Resistor mode
        3. 8.3.4.3 Buck Regulator with External LDO
        4. 8.3.4.4 AVDD Power Sequencing on Buck Regulator
        5. 8.3.4.5 Mixed mode Buck Operation and Control
      5. 8.3.5  AVDD Linear Voltage Regulator
      6. 8.3.6  Charge Pump
      7. 8.3.7  Slew Rate Control
      8. 8.3.8  Cross Conduction (Dead Time)
      9. 8.3.9  Propagation Delay
        1. 8.3.9.1 Driver Delay Compensation
      10. 8.3.10 Pin Diagrams
        1. 8.3.10.1 Logic Level Input Pin (Internal Pulldown)
        2. 8.3.10.2 Logic Level Input Pin (Internal Pullup)
        3. 8.3.10.3 Open Drain Pin
        4. 8.3.10.4 Push Pull Pin
        5. 8.3.10.5 Four Level Input Pin
        6. 8.3.10.6 Seven Level Input Pin
      11. 8.3.11 Active Demagnetization
        1. 8.3.11.1 Automatic Synchronous Rectification Mode (ASR Mode)
          1. 8.3.11.1.1 Automatic Synchronous Rectification in Commutation
          2. 8.3.11.1.2 Automatic Synchronous Rectification in PWM Mode
        2. 8.3.11.2 Automatic Asynchronous Rectification Mode (AAR Mode)
      12. 8.3.12 Cycle-by-Cycle Current Limit
        1. 8.3.12.1 Cycle by Cycle Current Limit with 100% Duty Cycle Input
      13. 8.3.13 Hall Comparators (Analog Hall Inputs)
      14. 8.3.14 Advance Angle
      15. 8.3.15 FGOUT Signal
      16. 8.3.16 Protections
        1. 8.3.16.1  VM Supply Undervoltage Lockout (NPOR)
        2. 8.3.16.2  AVDD Undervoltage Lockout (AVDD_UV)
        3. 8.3.16.3  Buck Undervoltage Lockout (BUCK_UV)
        4. 8.3.16.4  VCP Charge Pump Undervoltage Lockout (CPUV)
        5. 8.3.16.5  Overvoltage Protection (OVP)
        6. 8.3.16.6  Overcurrent Protection (OCP)
          1. 8.3.16.6.1 OCP Latched Shutdown (OCP_MODE = 00b)
          2. 8.3.16.6.2 OCP Automatic Retry (OCP_MODE = 01b)
        7. 8.3.16.7  Buck Overcurrent Protection
        8. 8.3.16.8  Motor Lock (MTR_LOCK)
          1. 8.3.16.8.1 MTR_LOCK Latched Shutdown (MTR_LOCK_MODE = 00b)
          2. 8.3.16.8.2 MTR_LOCK Automatic Retry (MTR_LOCK_MODE = 01b)
          3. 8.3.16.8.3 MTR_LOCK Report Only (MTR_LOCK_MODE= 10b)
          4. 8.3.16.8.4 MTR_LOCK Disabled (MTR_LOCK_MODE = 11b)
          5. 8.3.16.8.5 75
        9. 8.3.16.9  Thermal Warning (OTW)
        10. 8.3.16.10 Thermal Shutdown (OTSD)
          1. 8.3.16.10.1 OTSD FET
          2. 8.3.16.10.2 OTSD (Non-FET)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Functional Modes
        1. 8.4.1.1 Sleep Mode
        2. 8.4.1.2 Operating Mode
        3. 8.4.1.3 Fault Reset (CLR_FLT or nSLEEP Reset Pulse)
      2. 8.4.2 DRVOFF
    5. 8.5 SPI Communication
      1. 8.5.1 Programming
        1. 8.5.1.1 SPI Format
    6. 8.6 Register Map
      1. 8.6.1 STATUS Registers
      2. 8.6.2 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 Active Demagnetization
          3. 9.3.1.1.3 Using Delay Compensation
          4. 9.3.1.1.4 Using the Buck Regulator
          5. 9.3.1.1.5 Power Dissipation and Junction Temperature Losses
        2. 9.3.1.2 Application Curves
  11. 10Power Supply Recommendations
    1. 10.1 Bulk Capacitance
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
      1. 11.3.1 Power Dissipation
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.16 Protections

The MCT8315Z devices are protected against VM, AVDD, charge pump and buck undervoltage, VM overvoltage, buck and FET overcurrent, motor lock, SPI and OTP error and over temperature events. Table 8-8 summarizes various faults details.

Table 8-8 Fault Action and Response (SPI Devices)
FAULTCONDITIONCONFIGURATIONREPORTFETsLOGICRECOVERY
VM undervoltage
(NPOR)		VVM < VUVLO (falling)——Hi-ZDisabledAutomatic:
VVM > VUVLO (rising)
CLR_FLT, nSLEEP Reset Pulse (NPOR bit)
AVDD undervoltage
(NPOR)		VAVDD < VAVDD_UV (falling)——Hi-ZDisabledAutomatic:
VAVDD > VAVDD_UV (rising)
CLR_FLT, nSLEEP Reset Pulse (NPOR bit)
Buck undervoltage
(BUCK_UV)		VFB_BK < VBK_UV (falling)—nFAULTActiveActiveAutomatic:
VFB_BK > VBUCK_UV (rising)
CLR_FLT, nSLEEP Reset Pulse (BUCK_UV bit)
Charge pump undervoltage
(VCP_UV)		VCP < VCPUV (falling)—nFAULTHi-ZActiveAutomatic:
VVCP > VCPUV (rising)
CLR_FLT, nSLEEP Reset Pulse (VCP_UV bit)
Overvoltage Protection
(OVP)		VVM > VOVP (rising)OVP_EN = 0bNoneActiveActiveNo action (OVP Disabled)
OVP_EN = 1bnFAULTHi-ZActiveAutomatic:
VVM < VOVP (falling)
CLR_FLT, nSLEEP Reset Pulse (OVP bit)
Overcurrent Protection
(OCP)		IPHASE > IOCPOCP_MODE = 00bnFAULTHi-ZActiveLatched:
CLR_FLT, nSLEEP Reset Pulse (OCP bits)
OCP_MODE = 01bnFAULTHi-ZActiveRetry:
tRETRY
Buck Overcurrent Protection
(BUCK_OCP)		IBK > IBK_OCP—nFAULTActiveActiveRetry:
tBK_RETRY
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 erroneous—nFAULTHi-ZActiveLatched:
Power Cycle, nSLEEP Reset Pulse
Motor Lock
(MTR_LOCK)		No hall signals > tMTR_LOCK_TDETMTR_LOCK_MODE = 00bnFAULTHi-ZActiveLatched:
CLR_FLT, nSLEEP Pulse (MTR_LOCK bit)
MTR_LOCK_MODE = 01bnFAULTHi-ZActiveRetry:
tMTR_LOCK_RETRY
MTR_LOCK_MODE = 10bnFAULTActiveActiveAutomatic:
CLR_FLT, nSLEEP Reset Pulse (OCP bits)
MTR_LOCK_MODE = 11bNoneActiveActiveNo action
Thermal warning
(OTW)		TJ > TOTWOTW_REP = 0bNoneActiveActiveNo action
OTW_REP = 1bnFAULTActiveActiveAutomatic:
TJ < TOTW – TOTW_HYS
CLR_FLT, nSLEEP Pulse (OTW bit)
Thermal shutdown
(TSD)		 TJ > TTSD — nFAULT Hi-Z Active Automatic:
TJ < TTSD – TTSD_HYS
Thermal shutdown
(TSD_FET)		TJ > TTSD_FET—nFAULTHi-ZActiveAutomatic:
TJ < TTSD_FET – TTSD_FET_HYS
CLR_FLT, nSLEEP Pulse (OTS bit)