ZHCSME3 November   2020 TPS27SA08

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Summary Table
  6. 6 Pin Configuration and Functions
    1. 6.1 Recommended Connections for Unused Pins
  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 Switching Characteristics
    7. 7.7 SNS Timing Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Protection Mechanisms
        1. 9.3.1.1 Thermal Shutdown
        2. 9.3.1.2 Current Limit
          1. 9.3.1.2.1 Current Limit Foldback
          2. 9.3.1.2.2 Undervoltage Lockout (UVLO)
          3. 9.3.1.2.3 VBB during Short-to-Ground
        3. 9.3.1.3 Energy Limit
        4. 9.3.1.4 Voltage Transients
          1. 9.3.1.4.1 Driving Inductive and Capacitive Loads
        5. 9.3.1.5 Reverse supply
        6. 9.3.1.6 Fault Event – Timing Diagrams
      2. 9.3.2 Diagnostic Mechanisms
        1. 9.3.2.1 VOUT Short-to-supply and Open-Load
          1. 9.3.2.1.1 Detection With Switch Enabled
          2. 9.3.2.1.2 Detection With Switch Disabled
        2. 9.3.2.2 SNS Output
          1. 9.3.2.2.1 RSNS Value
            1. 9.3.2.2.1.1 High Accuracy Load Current Sense
            2. 9.3.2.2.1.2 SNS Output Filter
        3. 9.3.2.3 ST Pin
        4. 9.3.2.4 Fault Indication and SNS Mux
        5. 9.3.2.5 Resistor Sharing
        6. 9.3.2.6 High-Frequency, Low Duty-Cycle Current Sensing
    4. 9.4 Device Functional Modes
      1. 9.4.1 Off
      2. 9.4.2 Standby
      3. 9.4.3 Diagnostic
      4. 9.4.4 Standby Delay
      5. 9.4.5 Active
      6. 9.4.6 Fault
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Ground Protection Network
      2. 10.1.2 Interface With Microcontroller
      3. 10.1.3 I/O Protection
      4. 10.1.4 Inverse Current
      5. 10.1.5 Loss of GND
      6. 10.1.6 Thermal Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Thermal Considerations
        2. 10.2.2.2 Diagnostics
          1. 10.2.2.2.1 Selecting the RISNS Value
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Related Documentation
    2. 13.2 Trademarks
    3. 13.3 静电放电警告
    4. 13.4 术语表
  14. 14Mechanical, Packaging, and Orderable Information

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

7.7 SNS Timing Characteristics

VBB = 8 to 36 V, TJ = –40°C to 150°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SNS TIMING - CURRENT SENSE
tSNSION1 Settling time from rising edge of DIA_EN VEN = 5 V, VDIA_EN = 0 V to 5 V
RSNS = 1 kΩ, RL = 2.6 Ω		 40 µs
tSNSION2 Settling time from rising edge of EN VEN = VDIA_EN = 0 V to 5 V
RSNS = 1 kΩ, RL = 2.6 Ω		 180 µs
tSNSION3 Settling time from rising edge of EN VEN = 0 V to 5 V, VDIA_EN = 5 V
RSNS = 1 kΩ, RL = 2.6 Ω		 180 µs
tSNSIOFF1 Settling time from falling edge of DIA_EN VEN = 5 V, VDIA_EN = 5 V to 0 V
RSNS = 1 kΩ, RL = 2.6 Ω		 20 µs
tSETTLEH Settling time from rising edge of load step VEN = 5 V, VDIA_EN = 5 V
RSNS = 1 kΩ, IOUT = 1 A to 5 A		 20 µs
tSETTLEL Settling time from falling edge of load step VEN = 5 V, VDIA_EN = 5 V
RSNS = 1 kΩ, IOUT = 5 A to 1 A		 20 µs
SNS TIMING - TEMPERATURE SENSE
tSNSTON1 Settling time from rising edge of DIA_EN VEN = 5 V, VDIA_EN = 0 V to 5 V
RSNS = 1 kΩ		 40 µs
tSNSTON2 Settling time from rising edge of DIA_EN VEN = 0 V, VDIA_EN = 0 V to 5 V
RSNS = 1 kΩ		 70 µs
tSNSTOFF Settling time from falling edge of DIA_EN VEN = X, VDIA_EN = 5 V to 0 V
RSNS = 1 kΩ		 20 µs
SNS TIMING - VOLTAGE SENSE
tSNSVON1 Settling time from rising edge of DIA_EN VEN = 5 V, VDIA_EN = 0 V to 5 V
RSNS = 1 kΩ		 40 µs
tSNSVON2 Settling time from rising edge of DIA_EN VEN = 0 V, VDIA_EN = 0 V to 5 V
RSNS = 1 kΩ		 70 µs
tSNSVOFF Settling time from falling edge of DIA_EN VEN = X, VDIA_EN = 5 V to 0 V
RSNS = 1 kΩ		 20 µs
SNS TIMING - MULTIPLEXER
tMUX Settling time from temperature sense to current sense VEN= X, VDIA_EN = 5 V
VSEL1 = 5 V to 0 V, VSEL2 = 0 V
RSNS = 1 kΩ, RL = 2.6 Ω		 60 µs
Settling time from temperature sense to voltage sense VEN = X, VDIA_EN = 5 V
VSEL1 = 5 V, VSEL2 = 0 V to 5 V
RSNS = 1 kΩ		 60 µs
Settling time from voltage sense to temperature sense VEN = X, VDIA_EN = 5 V
VSEL1 = 5 V, VSEL2 = 5 V to 0 V
RSNS = 1 kΩ		 60 µs
Settling time from voltage sense to current sense VEN = X, VDIA_EN = 5 V
VSEL1 = VSEL2 = 5 V to 0 V,
RSNS = 1 kΩ, RL = 2.6 Ω		 60 µs
Settling time from current sense to temperature sense VEN = X, VDIA_EN = 5 V
VSEL1 = 0 V to 5 V, VSEL2 = 0 V
RSNS = 1 kΩ, RL = 2.6 Ω		 60 µs
Settling time from current sense to voltage sense VEN = X, VDIA_EN = 5 V
VSEL1 = VSEL2 = 0 V to 5 V
RSNS = 1 kΩ, RL = 2.6 Ω		 60 µs
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