ZHCSJ76A March   2018  – April 2019 DRV8343-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     简化原理图
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions—DRV8343H
    2.     Pin Functions—DRV8343S
  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 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 Three Phase Smart Gate Drivers
        1. 8.3.1.1 PWM Control Modes
          1. 8.3.1.1.1 6x PWM Mode (PWM_MODE = 000b or MODE Pin Tied to AGND)
          2. 8.3.1.1.2 3x PWM Mode (PWM_MODE = 001b or MODE Pin = 18 kΩ to AGND)
          3. 8.3.1.1.3 1x PWM Mode (PWM_MODE = 010b or MODE Pin = 75 kΩ to AGND)
          4. 8.3.1.1.4 Independent Half-Bridge PWM Mode (PWM_MODE = 011b or MODE Pin is > 1.5 MΩ to AGND or Hi-Z)
          5. 8.3.1.1.5 Phases A and B are Independent Half-Bridges, Phase C is Independent FET (MODE = 100b)
          6. 8.3.1.1.6 Phases B and C are Independent Half-Bridges, Phase A is Independent FET (MODE = 101b or MODE Pin is 75 kΩ to DVDD)
          7. 8.3.1.1.7 Phases A is Independent Half-Bridge, Phases B and C are Independent FET (MODE = 110b or MODE Pin is 18 kΩ to DVDD)
          8. 8.3.1.1.8 Independent MOSFET Drive Mode (PWM_MODE = 111b or MODE Pin = 0.47 kΩ to DVDD)
        2. 8.3.1.2 Device Interface Modes
          1. 8.3.1.2.1 Serial Peripheral Interface (SPI)
          2. 8.3.1.2.2 Hardware Interface
        3. 8.3.1.3 Gate Driver Voltage Supplies
        4. 8.3.1.4 Smart Gate Drive Architecture
          1. 8.3.1.4.1 IDRIVE: MOSFET Slew-Rate Control
          2. 8.3.1.4.2 TDRIVE: MOSFET Gate Drive Control
          3. 8.3.1.4.3 Propagation Delay
          4. 8.3.1.4.4 MOSFET VDS Monitors
          5. 8.3.1.4.5 VDRAIN Sense Pin
          6. 8.3.1.4.6 nFAULT Pin
      2. 8.3.2 DVDD Linear Voltage Regulator
      3. 8.3.3 Pin Diagrams
      4. 8.3.4 Low-Side Current Sense Amplifiers
        1. 8.3.4.1 Bidirectional Current Sense Operation
        2. 8.3.4.2 Unidirectional Current Sense Operation (SPI only)
        3. 8.3.4.3 Amplifier Calibration Modes
        4. 8.3.4.4 MOSFET VDS Sense Mode (SPI Only)
      5. 8.3.5 Gate Driver Protective Circuits
        1. 8.3.5.1  VM Supply Undervoltage Lockout (UVLO)
        2. 8.3.5.2  VCP Charge Pump Undervoltage Lockout (CPUV)
        3. 8.3.5.3  MOSFET VDS Overcurrent Protection (VDS_OCP)
          1. 8.3.5.3.1 VDS Latched Shutdown (OCP_MODE = 00b)
          2. 8.3.5.3.2 VDS Automatic Retry (OCP_MODE = 01b)
          3. 8.3.5.3.3 VDS Report Only (OCP_MODE = 10b)
          4. 8.3.5.3.4 VDS Disabled (OCP_MODE = 11b)
        4. 8.3.5.4  VSENSE Overcurrent Protection (SEN_OCP)
          1. 8.3.5.4.1 VSENSE Latched Shutdown (OCP_MODE = 00b)
          2. 8.3.5.4.2 VSENSE Automatic Retry (OCP_MODE = 01b)
          3. 8.3.5.4.3 VSENSE Report Only (OCP_MODE = 10b)
          4. 8.3.5.4.4 VSENSE Disabled (OCP_MODE = 11b)
        5. 8.3.5.5  Gate Driver Fault (GDF)
        6. 8.3.5.6  Thermal Warning (OTW)
        7. 8.3.5.7  Thermal Shutdown (OTSD)
          1. 8.3.5.7.1 Latched Shutdown (OTSD_MODE = 0b)
          2. 8.3.5.7.2 Automatic Recovery (OTSD_MODE = 1b)
        8. 8.3.5.8  Open Load Detection (OLD)
          1. 8.3.5.8.1 Open Load Detection in Passive Mode (OLP)
            1. 8.3.5.8.1.1 OLP Steps
          2. 8.3.5.8.2 Open Load Detection in Active Mode (OLA)
        9. 8.3.5.9  Offline Shorts Diagnostics
          1. 8.3.5.9.1 Offline Short-to-Supply Diagnostic (SHT_BAT)
          2. 8.3.5.9.2 Offline Short-to-Ground Diagnostic (SHT_GND)
        10. 8.3.5.10 Reverse Supply Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Gate Driver 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 ENABLE Reset Pulse)
    5. 8.5 Programming
      1. 8.5.1 SPI Communication
        1. 8.5.1.1 SPI
          1. 8.5.1.1.1 SPI Format
    6. 8.6 Register Maps
      1. 8.6.1 Status Registers
        1. 8.6.1.1 FAULT Status Register (Address = 0x00) [reset = 0x00]
          1. Table 16. FAULT Status Register Field Descriptions
        2. 8.6.1.2 DIAG Status A Register (Address = 0x01) [reset = 0x00]
          1. Table 17. DIAG Status A Register Field Descriptions
        3. 8.6.1.3 DIAG Status B Register (Address = 0x02) [reset = 0x00]
          1. Table 18. DIAG Status B Register Field Descriptions
        4. 8.6.1.4 DIAG Status C Register (address = 0x03) [reset = 0x00]
          1. Table 19. DIAG Status C Register Field Descriptions
      2. 8.6.2 Control Registers
        1. 8.6.2.1  IC1 Control Register (Address = 0x04) [reset = 0x00]
          1. Table 21. IC1 Control Field Descriptions
        2. 8.6.2.2  IC2 Control Register (address = 0x05) [reset = 0x40]
          1. Table 22. IC2 Control Field Descriptions
        3. 8.6.2.3  IC3 Control Register (Address = 0x06) [reset = 0xFF]
          1. Table 23. IC3 Control Field Descriptions
        4. 8.6.2.4  IC4 Control Register (Address = 0x07) [reset = 0xFF]
          1. Table 24. IC4 Control Field Descriptions
        5. 8.6.2.5  IC5 Control Register (Address = 0x08) [reset = 0xFF]
          1. Table 25. IC5 Control Field Descriptions
        6. 8.6.2.6  IC6 Control Register (Address = 0x09) [reset = 0x99]
          1. Table 26. IC6 Control Field Descriptions
        7. 8.6.2.7  IC7 Control Register (Address = 0x0A) [reset = 0x99]
          1. Table 27. IC7 Control Field Descriptions
        8. 8.6.2.8  IC8 Control Register (Address = 0x0B) [reset = 0x99]
          1. Table 28. IC8 Control Field Descriptions
        9. 8.6.2.9  IC9 Control Register (Address = 0x0C) [reset = 0x2F]
          1. Table 29. IC9 Control Field Descriptions
        10. 8.6.2.10 IC10 Control Register (Address = 0x0D) [reset = 0x61]
          1. Table 30. IC10 Control Field Descriptions
        11. 8.6.2.11 IC11 Control Register (Address = 0x0E) [reset = 0x00]
          1. Table 31. IC11 Control Field Descriptions
        12. 8.6.2.12 IC12 Control Register (Address = 0x0F) [reset = 0x2A]
          1. Table 32. IC12 Control Field Descriptions
        13. 8.6.2.13 IC13 Control Register (Address = 0x10) [reset = 0x7F]
          1. Table 33. IC13 Control Field Descriptions
        14. 8.6.2.14 IC14 Control Register (Address = 0x10) [reset = 0x00]
          1. Table 34. IC14 Control Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Primary Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 External MOSFET Support
            1. 9.2.1.2.1.1 Example
          2. 9.2.1.2.2 IDRIVE Configuration
            1. 9.2.1.2.2.1 Example
          3. 9.2.1.2.3 VDS Overcurrent Monitor Configuration
            1. 9.2.1.2.3.1 Example
          4. 9.2.1.2.4 Sense Amplifier Bidirectional Configuration
            1. 9.2.1.2.4.1 Example
          5. 9.2.1.2.5 External Components
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Application With One Sense Amplifier
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Sense Amplifier Unidirectional Configuration
            1. 9.2.2.2.1.1 Example
            2. 9.2.2.2.1.2 Unused pins
          2. 9.2.2.2.2 External Components
  10. 10Power Supply Recommendations
    1. 10.1 Power Supply Consideration in Generator Mode
    2. 10.2 Bulk Capacitance Sizing
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 器件命名规则
    2. 12.2 文档支持
      1. 12.2.1 相关文档
    3. 12.3 接收文档更新通知
    4. 12.4 社区资源
    5. 12.5 商标
    6. 12.6 静电放电警告
    7. 12.7 术语表
  13. 13机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.3.5.8.1 Open Load Detection in Passive Mode (OLP)

In open load detection in passive mode, open load diagnosis is performed without the motor in motion. If the motor is disconnected from the device an open load is detected and the nFAULT pin will latch low until a clear faults command is issued by the MCU either through the CLR_FLT bit or an ENABLE reset pulse. The fault also clears when the device is power cycled or comes out of sleep mode. OLP is designed for applications having capacitance less than the values listed in Table 10 between motor phase pins to ground.

Table 10. Open Load Passive Diagnostic Run-Time

Capacitance (nF) OLP_SHTS_DLY (ms)
5 0.25
26 1.25
110 5
270 11.5

When the open load test is running, all external MOSFETs are disabled. For the H/W device option, at power-up or after going from sleep mode, the offline short-to-supply (SHT_BAT) and short-to-ground (SHT_GND) diagnostics run first followed by the OLP diagnostic if the nDIAG pin is left as no connect or tied to GND. If the nDIAG pin is tied to DVDD (or an external 3.3 V) the open load test is not performed. If a short condition is detected, the OLP diagnostic is not run (see Offline Shorts Diagnostics). If a short condition and open load occurs on a given phase at device power-up, for example, only the short condition is reported on the nFAULT pin and through the SPI fault register. In the SPI device option the OLP test is performed when commanded through SPI. If both short and OLP diagnostics are enabled simultaneously and a short condition is detection, only the short condition is reported on the nFAULT pin and through the SPI fault register.

The sequence to perform open load diagnostics in passive mode is as follows:

  1. Device powered up (ENABLE = 1).
  2. Mode is selected by SPI.
  3. Hi-Z all three half-bridges by turning-off all the external MOSFETs.
  4. Write a 1 to the EN_OLP bit in the SPI register and OLP is performed.
    • If an open load is detected, the nFAULT pin is driven low, and the FAULT bit, the OLD bit, and the respective OL_PH_x bit are latched high. When the open load condition is removed, a clear faults command must be issued by the MCU either through the CLR_FLT bit or an ENABLE reset pulse which resets the OL_PH_x register bit and causes the nFAULT pin to go high.
    • If open load is not detected, the EN_OLP bits return to default setting (0b) after tOL expires.

The EN_OLP register keeps the written command until the diagnostic is complete. The half bridges must stay in Hi-Z state for the entire duration of the test. While open load diagnostic is running, if an input change occurs or the EN_OLP bit is set low, the open load test is aborted to start normal operation again, and no fault is reported. OLP should not be performed if the motor is energized.

The open load detection checks for a high impedance connection on the motor phase pins (SHx or DLx). The diagnostic has two major steps as listed in the OLP Steps section. The sequencing of the pullup and pulldown current varies depending on the load connections. Figure 38 a simplified H-bridge configuration as an example for open load detection.

DRV8343-Q1 drv8323-q1-open-load-passive.gifFigure 38. Circuit for Open Load Detection in Passive Mode