ZHCSC61B March   2014  – September 2020 TPS2556-Q1 , TPS2557-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Terminal Configuration and Functions
    1.     Terminal Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling 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 Typical Characteristics
      1.      16
  8. 8 Parameter Measurement Information
    1.     18
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Overcurrent Conditions
      2. 9.3.2 FAULT Response
      3. 9.3.3 Thermal Sense
    4. 9.4 Device Functional Modes
      1. 9.4.1 Undervoltage Lockout (UVLO)
      2. 9.4.2 Enable ( EN OR EN)
      3. 9.4.3 Auto-Retry Functionality
      4. 9.4.4 Two-Level Current-Limit Circuit
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application, Design for Current Limit
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Determine Design Parameters
        2. 10.2.2.2 Programming the Current-Limit Threshold
        3. 10.2.2.3 Selecting Current-Limit Resistor 1
        4. 10.2.2.4 Selecting Current-Limit Resistor 2
        5. 10.2.2.5 Accounting for Resistor Tolerance
        6. 10.2.2.6 Power Dissipation and Junction Temperature
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
    1.     44
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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10.2.1 Design Requirements

For this design example, use the following as the input parameters.

Table 10-1 Design Parameters
DESIGN PARAMETEREXAMPLE VALUE
Input voltage5 V
Minimum current limit3 A
Maximum current limit5 A
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