ZHCSIO5B October   2017  – January 2021 DRV8873-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 SPI Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Bridge Control
        1. 7.3.1.1 Control Modes
        2. 7.3.1.2 Half-Bridge Operation
        3. 7.3.1.3 22
        4. 7.3.1.4 Internal Current Sense and Current Regulation
        5. 7.3.1.5 Slew-Rate Control
        6. 7.3.1.6 Dead Time
        7. 7.3.1.7 Propagation Delay
        8. 7.3.1.8 nFAULT Pin
        9. 7.3.1.9 nSLEEP as SDO Reference
      2. 7.3.2 Motor Driver Protection Circuits
        1. 7.3.2.1 VM Undervoltage Lockout (UVLO)
        2. 7.3.2.2 VCP Undervoltage Lockout (CPUV)
        3. 7.3.2.3 Overcurrent Protection (OCP)
          1. 7.3.2.3.1 Latched Shutdown (OCP_MODE = 00b)
          2. 7.3.2.3.2 Automatic Retry (OCP_MODE = 01b)
          3. 7.3.2.3.3 Report Only (OCP_MODE = 10b)
          4. 7.3.2.3.4 Disabled (OCP_MODE = 11b)
        4. 7.3.2.4 Open-Load Detection (OLD)
          1. 7.3.2.4.1 Open-Load Detection in Passive Mode (OLP)
          2. 7.3.2.4.2 Open-Load Detection in Active Mode (OLA)
        5. 7.3.2.5 Thermal Shutdown (TSD)
          1. 7.3.2.5.1 Latched Shutdown (TSD_MODE = 0b)
          2. 7.3.2.5.2 Automatic Recovery (TSD_MODE = 1b)
        6. 7.3.2.6 Thermal Warning (OTW)
      3. 7.3.3 Hardware Interface
        1. 7.3.3.1 MODE (Tri-Level Input)
        2. 7.3.3.2 Slew Rate
    4. 7.4 Device Functional Modes
      1. 7.4.1 Motor Driver Functional Modes
        1. 7.4.1.1 Sleep Mode (nSLEEP = 0)
        2. 7.4.1.2 Disable Mode (nSLEEP = 1, DISABLE = 1)
        3. 7.4.1.3 Operating Mode (nSLEEP = 1, DISABLE = 0)
        4. 7.4.1.4 nSLEEP Reset Pulse
    5. 7.5 Programming
      1. 7.5.1 Serial Peripheral Interface (SPI) Communication
        1. 7.5.1.1 SPI Format
        2. 7.5.1.2 SPI for a Single Slave Device
        3. 7.5.1.3 SPI for Multiple Slave Devices in Parallel Configuration
        4. 7.5.1.4 SPI for Multiple Slave Devices in Daisy Chain Configuration
    6. 7.6 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Motor Voltage
        2. 8.2.1.2 Drive Current and Power Dissipation
        3. 8.2.1.3 Sense Resistor
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Thermal Considerations
        2. 8.2.2.2 Heatsinking
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance Sizing
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 静电放电警告
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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7.3.2.6 Thermal Warning (OTW)

If the die temperature exceeds the trip point of the thermal warning (TOTW) the OTW bit is set in the registers of SPI devices. The device performs no additional action and continues to function. When the die temperature falls below the hysteresis point of the thermal warning, the OTW bit clears automatically. The OTW bit can also be configured to report on the nFAULT pin, and set the FAULT bit in the SPI version of the device, by setting the OTW_REP bit to 1b through the SPI registers. The charge pump remains active during this condition.

Table 7-13 Fault Response
FAULTCONDITIONCONFIGURATIONREPORTHALF BRIDGELOGICRECOVERY
VM undervoltage (UVLO)VVM < V(UVLO)
(maximum 4.45 V)		—nFAULTHi-ZResetAutomatic: VVM > V(UVLO)
(maximum 4.55 V)
Charge pump undervoltage (CPUV)VVCP < VVCP(UV)
(typical VVM + 2.25 V)		DIS_CPUV = 0bnFAULTHi-ZActiveAutomatic: VVCP > VVCP(UV) (typical VVM + 2.25 V)
DIS_CPUV = 1bnoneActiveActiveNo action
Overcurrent (OCP)IO > I(OCP)
(minimum 10 A)		OCP_MODE = 00bnFAULTHi-ZActiveLatched: CLR_FLT/nSLEEP
OCP_MODE = 01bnFAULTHi-ZActiveRetry: t(RETRY)
OCP_MODE = 10bnFAULTActiveActiveNo action
OCP_MODE = 11bnoneActiveActiveNo action
Open load (OLD)No load detectedEN_OLP = 1bnFAULTActiveActiveLatched: CLR_FLT/nSLEEP
EN_OLA = 1bnFAULTActiveActiveLatched: CLR_FLT/nSLEEP
Current regulation (ITRIPx)IO > ITRIP_LVLITRIP_REP = 0bnoneActiveActiveNo action
ITRIP_REP = 1bnFAULTActiveActiveNo action
Thermal shutdown (TSD)TJ > TTSD
(minimum 165°C)		TSD_MODE = 0bnFAULTHi-ZActiveLatched: CLR_FLT/nSLEEP
TSD_MODE = 1bnFAULTHi-ZActiveAutomatic:
TJ > TTSD – THYS
(THYS typical 20°C)
Thermal Warning (OTW)TJ > TOTW
(minimum 140°C)		OTW_REP = 0bnoneActiveActiveNo action
OTW_REP = 1bnFAULTActiveActiveAutomatic: TJ < TOTW – THYS