ZHCSUL8 December   2023 DRV8334

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
    1. 5.1 Pin Functions 48-Pin DRV8334
  7. 6 Specification
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings DRV8334
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information DRV8334
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 SPI Timing Diagrams
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Three BLDC Gate Drivers
        1. 7.3.1.1 PWM Control Modes
          1. 7.3.1.1.1 6x PWM Mode
          2. 7.3.1.1.2 3x PWM Mode with INLx enable control
          3. 7.3.1.1.3 3x PWM Mode with SPI enable control
          4. 7.3.1.1.4 1x PWM Mode
          5. 7.3.1.1.5 SPI Gate Drive Mode
        2. 7.3.1.2 Gate Drive Architecture
          1. 7.3.1.2.1 Bootstrap diode
          2. 7.3.1.2.2 GVDD Charge pump
          3. 7.3.1.2.3 VCP Trickle Charge pump
          4. 7.3.1.2.4 Gate Driver Output
          5. 7.3.1.2.5 Passive and Semi-active pull-down resistor
          6. 7.3.1.2.6 TDRIVE Gate Drive Timing Control
          7. 7.3.1.2.7 Propagation Delay
          8. 7.3.1.2.8 Deadtime and Cross-Conduction Prevention
      2. 7.3.2 Low-Side Current Sense Amplifiers
        1. 7.3.2.1 Unidirectional Current Sense Operation
        2. 7.3.2.2 Bidirectional Current Sense Operation
      3. 7.3.3 Gate Driver Shutdown
        1. 7.3.3.1 DRVOFF Gate Driver Shutdown
        2. 7.3.3.2 Gate Driver Shutdown Timing Sequence
      4. 7.3.4 Gate Driver Protective Circuits
        1. 7.3.4.1  PVDD Supply Undervoltage Lockout (PVDD_UV)
        2. 7.3.4.2  GVDD Undervoltage Lockout (GVDD_UV)
        3. 7.3.4.3  BST Undervoltage Lockout (BST_UV)
        4. 7.3.4.4  MOSFET VDS Overcurrent Protection (VDS_OCP)
        5. 7.3.4.5  VSENSE Overcurrent Protection (SEN_OCP)
        6. 7.3.4.6  Phase Comparators
        7. 7.3.4.7  Thermal Shutdown (OTSD)
        8. 7.3.4.8  Thermal Warning (OTW)
        9. 7.3.4.9  OTP CRC
        10. 7.3.4.10 SPI Watchdog Timer
    4. 7.4 Device Functional Modes
      1. 7.4.1 Gate Driver Functional Modes
        1. 7.4.1.1 Sleep Mode
        2. 7.4.1.2 Operating Mode
      2. 7.4.2 Device Power Up Sequence
    5. 7.5 Programming
      1. 7.5.1 SPI
      2. 7.5.2 SPI Format
      3. 7.5.3 SPI Format Diagrams
    6. 7.6 Register Maps
      1. 7.6.1 STATUS Registers
      2. 7.6.2 CONTROL Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Typical Application with 48-pin package
        1. 8.2.1.1 External Components
      2. 8.2.2 Application Curves
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Community Resources
    4. 10.4 Trademarks
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Option Addendum
    2. 11.2 Tape and Reel Information

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7.3.4.1 PVDD Supply Undervoltage Lockout (PVDD_UV)

If at any time the power supply voltage on the PVDD pin falls below the VPVDD_UV threshold for longer than the tPVDD_UV_DG time, the DRV8334 detects a PVDD undervoltage event. After detecting the undervoltage condition, the gate driver disabled, charge pump disabled and nFAULT pin is driven low. After PVDD_UV condition is cleared, the fault state remains latched and can be cleared through an SPI command.

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