JAJSHA7C February   2018  – February 2020 TPS2HB16-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     概略回路図
  4. 4 改訂履歴
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
    2. 6.1 Recommended Connections for Unused Pins
  7. 7 Specifications
    1. Table 3. Absolute Maximum Ratings
    2. Table 4. ESD Ratings
    3. Table 5. Recommended Operating Conditions
    4. Table 6. Thermal Information
    5. Table 7. Electrical Characteristics
    6. Table 8. SNS Timing Characteristics
    7. Table 9. Switching Characteristics
    8. 7.1      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 Programmable Current Limit
          3. 9.3.1.2.3 Undervoltage Lockout (UVLO)
          4. 9.3.1.2.4 VBB During Short-to-Ground
        3. 9.3.1.3 Voltage Transients
          1. 9.3.1.3.1 Load Dump
        4. 9.3.1.4 Driving Inductive Loads
        5. 9.3.1.5 Reverse Battery
        6. 9.3.1.6 Fault Event – Timing Diagrams (Version A/B)
      2. 9.3.2 Fault Event – Timing Diagrams - Version F
      3. 9.3.3 Diagnostic Mechanisms
        1. 9.3.3.1 VOUTx Short-to-Battery and Open-Load
          1. 9.3.3.1.1 Detection With Switch Enabled
          2. 9.3.3.1.2 Detection With Switch Disabled
        2. 9.3.3.2 SNS Output
          1. 9.3.3.2.1 RSNS Value
            1. 9.3.3.2.1.1 High Accuracy Load Current Sense
            2. 9.3.3.2.1.2 SNS Output Filter
        3. 9.3.3.3 Fault Indication and SNS Mux
        4. 9.3.3.4 Resistor Sharing
        5. 9.3.3.5 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 Automotive Standards
        1. 10.1.6.1 ISO7637-2
        2. 10.1.6.2 AEC – Q100-012 Short Circuit Reliability
      7. 10.1.7 Thermal Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
      4. 10.2.4 Design Requirements
      5. 10.2.5 Detailed Design Procedure
      6. 10.2.6 Application Curves
    3. 10.3 Typical Application
      1. 10.3.1 Design Requirements
      2. 10.3.2 Detailed Design Procedure
        1. 10.3.2.1 Thermal Considerations
        2. 10.3.2.2 RILIM Calculation
        3. 10.3.2.3 Diagnostics
          1. 10.3.2.3.1 Selecting the RSNS Value
      3. 10.3.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 ドキュメントのサポート
      1. 13.1.1 関連資料
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 サポート・リソース
    4. 13.4 商標
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 Glossary
  14. 14メカニカル、パッケージ、および注文情報

9.3.1.2.3 Undervoltage Lockout (UVLO)

The device monitors the supply voltage VBB to prevent unpredicted behaviors in the event that the supply voltage is too low. When the supply voltage falls down to VUVLOF, the output stage is shut down automatically. When the supply rises up to VUVLOR, the device turns back on.

During an initial ramp of VBB from 0 V at a ramp rate slower than 1 V/ms, VEN pin will have to beBB held low until VBB is above UVLO threshold (with respect to board ground) and the supply voltage to the device has reliably reached above the UVLO condition. For best operation, ensure that VBB has risen above UVLO before setting the VEN pin to high.