ZHCSL47A April   2020  – January 2021 LM5181

PRODUCTION DATA  

1. 1 特性
2. 2 应用
3. 3 说明
4. 4 Revision History
5. 5 Description (continued)
6. 6 Pin Configuration and Functions
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 Typical Characteristics
8. 8 Detailed Description
   1. 8.1 Overview
   2. 8.2 Functional Block Diagram
   3. 8.3 Feature Description
      1. 8.3.1  Integrated Power MOSFET
      2. 8.3.2  PSR Flyback Modes of Operation
      3. 8.3.3  Setting the Output Voltage
         1. 8.3.3.1 Diode Thermal Compensation
      4. 8.3.4  Control Loop Error Amplifier
      5. 8.3.5  Precision Enable
      6. 8.3.6  Configurable Soft Start
      7. 8.3.7  External Bias Supply
      8. 8.3.8  Minimum On-Time and Off-Time
      9. 8.3.9  Overcurrent Protection
      10. 8.3.10 Thermal Shutdown
   4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Active Mode
9. 9 Application and Implementation
   1. 9.1 Application Information
   2. 9.2 Typical Applications
      1. 9.2.1 Design 1: Wide VIN, Low IQ PSR Flyback Converter Rated at 5 V, 0.5 A
         1. 9.2.1.1 Design Requirements
         2. 9.2.1.2 Detailed Design Procedure
            1. 9.2.1.2.1  Custom Design With WEBENCH® Tools
            2. 9.2.1.2.2  Custom Design With Excel Quickstart Tool
            3. 9.2.1.2.3  Flyback Transformer – T1
            4. 9.2.1.2.4  Flyback Diode – DFLY
            5. 9.2.1.2.5  Zener Clamp Circuit – DF, DCLAMP
            6. 9.2.1.2.6  Output Capacitor – COUT
            7. 9.2.1.2.7  Input Capacitor – CIN
            8. 9.2.1.2.8  Feedback Resistor – RFB
            9. 9.2.1.2.9  Thermal Compensation Resistor – RTC
            10. 9.2.1.2.10 UVLO Resistors – RUV1, RUV2
            11. 9.2.1.2.11 Soft-Start Capacitor – CSS
      2. 9.2.2 Application Curves
10. 10Power Supply Recommendations
11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
12. 12Device and Documentation Support
    1. 12.1 Device Support
       1. 12.1.1 第三方产品免责声明
       2. 12.1.2 Development Support
          1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
       1. 12.2.1 Related Documentation
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 静电放电警告
    7. 12.7 术语表
13. 13Mechanical, Packaging, and Orderable Information