SLVSF18B March   2021  – November 2021 MCT8316Z

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 SPI Timing Requirements
    7. 7.7 SPI Secondary Mode Timings
    8. 7.8 Typical Characteristics
  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  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 Protections (OV)
        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)
          3. 8.3.16.6.3 OCP Report Only (OCP_MODE = 10b)
          4. 8.3.16.6.4 OCP Disabled (OCP_MODE = 11b)
        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 77
        9. 8.3.16.9  Thermal Warning (OTW)
        10. 8.3.16.10 Thermal Shutdown (OTS)
    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 functionality
    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
  9. 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
  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

Package Options

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

Pin Functions

PIN 40-pin Package TYPE(1) DESCRIPTION
NAME MCT8316ZR MCT8316ZT
ADVANCE — 35 I Advance angle level setting. This pin is a 7-level input pin set by an external resistor.
AGND 2, 26 2, 26 GND Device analog ground. Refer Section 11.1 for connections recommendation.
AVDD 25 25 PWR O 3.3-V internal regulator output. Connect an X5R or X7R, 1-µF, 6.3-V ceramic capacitor between the AVDD and AGND pins. This regulator can source up to 30 mA externally.
BRAKE 38 38 I High → Brake the motor when High by turning all low side MOSFETs ON
Low → normal operation
CP 8 8 PWR O Charge pump output. Connect a X5R or X7R, 1-µF, 16-V ceramic capacitor between the CP and VM pins.
CPH 7 7 PWR Charge pump switching node. Connect a X5R or X7R, 47-nF, ceramic capacitor between the CPH and CPL pins. TI recommends a capacitor voltage rating at least twice the normal operating voltage of the device.
CPL 6 6 PWR
DIR — 36 I Direction pin for setting the direction of the motor rotation to clockwise or counterclockwise.
DRVOFF 21 21 I When this pin is pulled high the six MOSFETs in the power stage are turned OFF making all outputs Hi-Z.
FB_BK 3 3 PWR I Feedback for buck regulator. Connect to buck regulator output after the inductor/resistor.
FGOUT 40 40 O Motor Speed indicator output. Open-drain output requires an external pull-up resistor to 1.8V to 5.0V. It can be set to different division factor of Hall signals (see Section 8.3.15)
GND_BK 4 4 GND Buck regulator ground. Refer Section 11.1 for connections recommendation.
HPA 27 27 I Phase A hall element positive input. Noise filter capacitors may be desirable, connected between the positive and negative hall inputs.
HPB 29 29 I Phase B hall element positive input. Noise filter capacitors may be desirable, connected between the positive and negative hall inputs.
HPC 31 31 I Phase C hall element positive input. Noise filter capacitors may be desirable, connected between the positive and negative hall inputs.
HNA 28 28 I Phase A hall element negative input. Noise filter capacitors may be desirable, connected between the positive and negative hall inputs.
HNB 30 30 I Phase B hall element negative input. Noise filter capacitors may be desirable, connected between the positive and negative hall inputs.
HNC 32 32 I Phase C hall element negative input. Noise filter capacitors may be desirable, connected between the positive and negative hall inputs.
ILIM 37 37 I Set the threshold for phase current used in cycle by cycle current limit.
MODE — 33 I PWM input mode setting. This pin is a 7-level input pin set by an external resistor.
NC 1, 24 1 — No connection, open
nFAULT 22 22 O Fault indicator. Pulled logic-low with fault condition; Open-drain output requires an external pull-up resistor to 1.8V to 5.0V. If external supply is used to pull up nFAULT, ensure that it is pulled to >2.2V on power up or the device will enter test mode
nSCS 36 — I Serial chip select. A logic low on this pin enables serial interface communication.
nSLEEP 23 23 I Driver nSLEEP. When this pin is logic low, the device goes into a low-power sleep mode. An 20 to 40-µs low pulse can be used to reset fault conditions without entering sleep mode.
OUTA 13, 14 13, 14 PWR O Half bridge output A
OUTB 16, 17 16, 17 PWR O Half bridge output B
OUTC 19, 20 19, 20 PWR O Half bridge output C
PGND 12, 15, 18 12, 15, 18 GND Device power ground. Refer Section 11.1 for connections recommendation.
PWM 39 39 I PWM input for motor control. Set the duty cycle and switching frequency of the phase voltage of the motor.
SCLK 35 — I Serial clock input. Serial data is shifted out and captured on the corresponding rising and falling edge on this pin (SPI devices).
SDI 34 — I Serial data input. Data is captured on the falling edge of the SCLK pin (SPI devices).
SDO 33 — O Serial data output. Data is shifted out on the rising edge of the SCLK pin. This pin requires an external pullup resistor (SPI devices).
SLEW — 34 I Slew rate control setting. This pin is a 4-level input pin set by an external resistor (Hardware devices).
SW_BK 5 5 PWR O Buck switch node. Connect this pin to an inductor or resistor.
VM 9, 10, 11 9, 10, 11 PWR I Power supply. Connect to motor supply voltage; bypass to PGND with two 0.1-µF capacitors (for each pin) plus one bulk capacitor rated for VM. TI recommends a capacitor voltage rating at least twice the normal operating voltage of the device.
VSEL_BK — 24 I Buck output voltage setting. This pin is a 4-level input pin set by an external resistor.
Thermal pad GND Must be connected to analog ground.
(1) I = input, O = output, GND = ground pin, PWR = power, NC = no connect