ZHCSP56 September   2023 TPS1HTC30-Q1

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 Recommended Connections for Unused Pins
  7. 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 SNS Timing Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 功能方框图
    3. 8.3 Feature Description
      1. 8.3.1 Accurate Current Sense
      2. 8.3.2 Programmable Current Limit
        1. 8.3.2.1 Capacitive Charging
      3. 8.3.3 Inductive-Load Switching-Off Clamp
      4. 8.3.4 Inductive Load Demagnetization
      5. 8.3.5 Full Protections and Diagnostics
        1. 8.3.5.1 Short-Circuit and Overload Protection
        2. 8.3.5.2 Open-Load Detection
        3. 8.3.5.3 Thermal Protection Behavior
        4. 8.3.5.4 Overvoltage (OVP) Protection
        5. 8.3.5.5 UVLO Protection
        6. 8.3.5.6 Reverse Polarity Protection
        7. 8.3.5.7 Protection for MCU I/Os
      6. 8.3.6 Diagnostic Enable Function
    4. 8.4 Device Functional Modes
      1. 8.4.1 Working Mode
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Dynamically Changing Current Limit
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
        1. 9.4.2.1 Without a GND Network
        2. 9.4.2.2 With a GND Network
        3. 9.4.2.3 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 静电放电警告
    6. 10.6 术语表
  12. 11Mechanical, Packaging, and Orderable Information

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8.3.5 Full Protections and Diagnostics

Current Sensing is active when DIAG_EN enabled. When DIAG_EN is low, current sense is disabled. The SNS output is in high-impedance mode.

Table 8-1 DIAG_EN Logic Table
DIAG_EN EN Condition Protections and Diagnostics
HIGH

HIGH

 See Fault Table
LOW
LOW HIGH Diagnostics disabled, FAULT and SNS output set to high impedance. Protection is normal.
LOW
Table 8-2 DIAG_EN=HIGH Status Table
Conditions EN VOUT FAULT SNS Behavior Recovery
Normal L L Hi-Z 0 Normal
H H Hi-Z ILoad / KSNS Normal
Overcurrent H VS - ILIM*RLOAD L VSNSFH Holds the current at the current limit until thermal shutdown
Overvoltage H H →L L VSNSFH Channel turns off if VS > VS,OVPR, turns back on if VS < VS,OVPRF
STG, Relative Thermal Shutdown, Absolute Thermal Shutdown H H→L L VSNSFH Shuts down when devices hits relative or absolute thermal shutdown Auto retries when THYS is met and time has been longer than tRETRY amount of time
Open load H H Hi-Z ILoad / KSNS = approximately 0 Normal behavior, user can judge if it is an open load or not
L H L VSNSFH Internal pullup resistor is active. If VS – VOUT < VOL then fault active Clears when fault goes away
Reverse Polarity x x x x Channel turns on to lower power dissipation. Current into ground pin is limited by external ground network