SLVSGK9 January   2022 DRV8316-Q1

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
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings AUTO
    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 Slave 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  Control Modes
        1. 8.3.2.1 6x PWM Mode (MODE = 00b or MODE Pin Tied to AGND)
        2. 8.3.2.2 3x PWM Mode (MODE = 10b or MODE Pin is Connected to AGND with RMODE)
        3. 8.3.2.3 Current Limit Mode (MODE = 01b / 11b or MODE Pin is Hi-Z or Connected to AVDD)
      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
        6. 8.3.4.6 Buck Undervoltage Protection
        7. 8.3.4.7 Buck Overcurrent Protection
      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
      11. 8.3.11 Current Sense Amplifiers
        1. 8.3.11.1 Current Sense Amplifier Operation
      12. 8.3.12 Current Sense Amplifier Offset Correction
      13. 8.3.13 Active Demagnetization
        1. 8.3.13.1 Automatic Synchronous Rectification Mode (ASR Mode)
          1. 8.3.13.1.1 Automatic Synchronous Rectification in Commutation
          2. 8.3.13.1.2 Automatic Synchronous Rectification in PWM Mode
        2. 8.3.13.2 Automatic Asynchronous Rectification Mode (AAR Mode)
      14. 8.3.14 Cycle-by-Cycle Current Limit
        1. 8.3.14.1 Cycle by Cycle Current Limit with 100% Duty Cycle Input
      15. 8.3.15 Protections
        1. 8.3.15.1 VM Supply Undervoltage Lockout (NPOR)
        2. 8.3.15.2 AVDD Undervoltage Lockout (AVDD_UV)
        3. 8.3.15.3 BUCK Undervoltage Lockout (BUCK_UV)
        4. 8.3.15.4 VCP Charge Pump Undervoltage Lockout (CPUV)
        5. 8.3.15.5 Overvoltage Protections (OV)
        6. 8.3.15.6 Overcurrent Protection (OCP)
          1. 8.3.15.6.1 OCP Latched Shutdown (OCP_MODE = 00b)
          2. 8.3.15.6.2 OCP Automatic Retry (OCP_MODE = 01b)
          3. 8.3.15.6.3 OCP Report Only (OCP_MODE = 10b)
          4. 8.3.15.6.4 OCP Disabled (OCP_MODE = 11b)
        7. 8.3.15.7 Buck Overcurrent Protection
        8. 8.3.15.8 Thermal Warning (OTW)
        9. 8.3.15.9 Thermal Shutdown (OTS)
          1. 8.3.15.9.1 OTS FET
          2. 8.3.15.9.2 OTS (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 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 Typical Applications
      1. 9.2.1 Three-Phase Brushless-DC Motor Control
        1. 9.2.1.1 Detailed Design Procedure
          1. 9.2.1.1.1 Motor Voltage
          2. 9.2.1.1.2 Using Active Demagnetization
          3. 9.2.1.1.3 Driver Propagation Delay and Dead Time
          4. 9.2.1.1.4 Using Delay Compensation
          5. 9.2.1.1.5 Using the Buck Regulator
          6. 9.2.1.1.6 Current Sensing and Output Filtering
          7. 9.2.1.1.7 Power Dissipation and Junction Temperature Losses
        2. 9.2.1.2 Application Curves
      2. 9.2.2 Three-Phase Brushless-DC Motor Control With Current Limit
        1. 9.2.2.1 Block Diagram
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Motor Voltage
          2. 9.2.2.2.2 ILIM Implementation
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Brushed-DC and Solenoid Load
        1. 9.2.3.1 Block Diagram
        2. 9.2.3.2 Design Requirements
          1. 9.2.3.2.1 Detailed Design Procedure
      4. 9.2.4 Three Solenoid Loads
        1. 9.2.4.1 Block Diagram
        2. 9.2.4.2 Design Requirements
          1. 9.2.4.2.1 Detailed Design Procedure
  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

Package Options

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

10.1 Bulk Capacitance

Having an appropriate local bulk capacitance is an important factor in motor drive system design. It is generally beneficial to have more bulk capacitance, while the disadvantages are increased cost and physical size.

The amount of local capacitance needed depends on a variety of factors, including:

  • The highest current required by the motor system
  • The capacitance and current capability of the power supply
  • The amount of parasitic inductance between the power supply and motor system
  • The acceptable voltage ripple
  • The type of motor used (brushed dc, brushless DC, stepper)
  • The motor braking method

The inductance between the power supply and the motor drive system limits the rate current can change from the power supply. If the local bulk capacitance is too small, the system responds to excessive current demands or dumps from the motor with a change in voltage. When adequate bulk capacitance is used, the motor voltage remains stable and high current can be quickly supplied.

The data sheet generally provides a recommended value, but system-level testing is required to determine the appropriate sized bulk capacitor.

GUID-3F64F282-4EF2-4CB2-B726-8581C0636986-low.gifFigure 10-1 Example Setup of Motor Drive System With External Power Supply

The voltage rating for bulk capacitors should be higher than the operating voltage, to provide margin for cases when the motor transfers energy to the supply.