ZHCSK45C august   2019  – december 2020 UCC28740-Q1

PRODUCTION DATA  

1.   1
2. 1 特性
3. 2 应用
4. 3 说明
5. 4 Revision History
6. 5 Revision History
7. 6 Revision History
8. 7 Pin Configuration and Functions
   1. 7.1 Pin Functions
9. 8 Specifications
   1. 8.1 Absolute Maximum Ratings
   2. 8.2 ESD Ratings
   3. 8.3 Recommended Operating Conditions
   4. 8.4 Thermal Information
   5. 8.5 Electrical Characteristics
   6. 8.6 Switching Characteristics
   7. 8.7 Typical Characteristics
10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
       1. 9.3.1 Detailed Pin Description
       2. 9.3.2 Valley-Switching and Valley-Skipping
       3. 9.3.3 Startup Operation
       4. 9.3.4 Fault Protection
    4. 9.4 Device Functional Modes
       1. 9.4.1 Secondary-Side Optically Coupled Constant-Voltage (CV) Regulation
       2. 9.4.2 Primary-Side Constant-Current (CC) Regulation
11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 High Voltage Applications
    3. 10.3 Typical Application
       1. 10.3.1 Design Requirements
       2. 10.3.2 Detailed Design Procedure
          1. 10.3.2.1  Custom Design With WEBENCH® Tools
          2. 10.3.2.2  Standby Power Estimate and No-Load Switching Frequency
          3. 10.3.2.3  Input Bulk Capacitance and Minimum Bulk Voltage
          4. 10.3.2.4  38
          5. 10.3.2.5  Transformer Turns-Ratio, Inductance, Primary Peak Current
          6. 10.3.2.6  Transformer Parameter Verification
          7. 10.3.2.7  VS Resistor Divider, Line Compensation
          8. 10.3.2.8  Output Capacitance
          9. 10.3.2.9  VDD Capacitance, CVDD
          10. 10.3.2.10 Feedback Network Biasing
       3. 10.3.3 Application Curves
12. 11Power Supply Recommendations
13. 12Layout
    1. 12.1 Layout Guidelines
       1. 12.1.1 VDD Pin
       2. 12.1.2 VS Pin
       3. 12.1.3 FB Pin
       4. 12.1.4 GND Pin
       5. 12.1.5 CS Pin
       6. 12.1.6 DRV Pin
       7. 12.1.7 HV Pin
    2. 12.2 Layout Example
14. 13Device and Documentation Support
    1. 13.1 Device Support
       1. 13.1.1 Development Support
          1. 13.1.1.1 Custom Design With WEBENCH® Tools
       2. 13.1.2 Device Nomenclature
          1. 13.1.2.1  Capacitance Terms in Farads
          2. 13.1.2.2  Duty Cycle Terms
          3. 13.1.2.3  Frequency Terms in Hertz
          4. 13.1.2.4  Current Terms in Amperes
          5. 13.1.2.5  Current and Voltage Scaling Terms
          6. 13.1.2.6  Transformer Terms
          7. 13.1.2.7  Power Terms in Watts
          8. 13.1.2.8  Resistance Terms in Ohms
          9. 13.1.2.9  Timing Terms in Seconds
          10. 13.1.2.10 Voltage Terms in Volts
          11. 13.1.2.11 AC Voltage Terms in VRMS
          12. 13.1.2.12 Efficiency Terms
    2. 13.2 Documentation Support
       1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
15.   Mechanical, Packaging, and Orderable Information

UCC28740-Q1 适用于汽车且具有集成式高压启动和光耦合器反馈功能的
超低待机功耗反激式控制器