ZHCSEK1B December   2013  – October 2015 UCC28722

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
  6. 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Device Bias Voltage Supply (VDD)
      2. 7.3.2 Ground (GND)
      3. 7.3.3 Voltage-Sense (VS)
      4. 7.3.4 Base Drive (DRV)
      5. 7.3.5 Current Sense (CS)
        1. 7.3.5.1 Example
      6. 7.3.6 Cable Compensation (CBC)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Primary-Side Voltage Regulation
      2. 7.4.2 Primary-Side Current Regulation
      3. 7.4.3 Valley Switching
      4. 7.4.4 Start-Up Operation
      5. 7.4.5 Fault Protection
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Stand-by Power Estimate
        2. 8.2.2.2 Input Bulk Capacitance and Minimum Bulk Voltage
        3. 8.2.2.3 Transformer Turns Ratio, Inductance, Primary-Peak Current
        4. 8.2.2.4 Transformer Parameter Verification
        5. 8.2.2.5 Output Capacitance
        6. 8.2.2.6 VDD Capacitance, CDD
        7. 8.2.2.7 VS Resistor Divider, Line Compensation, and Cable Compensation
        8. 8.2.2.8 Startup Resistance and Startup Time
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 器件命名规则
        1. 11.1.1.1 术语定义
          1. 11.1.1.1.1  法拉电容术语
          2. 11.1.1.1.2  占空比术语
          3. 11.1.1.1.3  频率术语（以赫兹为单位）
          4. 11.1.1.1.4  电流术语（以安培为单位）
          5. 11.1.1.1.5  电流和电压调节术语
          6. 11.1.1.1.6  变压器术语
          7. 11.1.1.1.7  功率术语（以瓦特为单位）
          8. 11.1.1.1.8  电阻术语（以 Ω 为单位）
          9. 11.1.1.1.9  时序术语（以秒为单位）
          10. 11.1.1.1.10 电压术语（以伏特为单位）
          11. 11.1.1.1.11 交流电压术语（以 VRMS 为单位）
          12. 11.1.1.1.12 效率术语
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

9 Power Supply Recommendations

The UCC28722 is intended for AC/DC adapters and chargers with input voltage range of 85 VAC(rms) to 265 VAC(rms) using Flyback topology. This device can be used in other applications and converter topologies with different input voltages. Ensure that all voltages and currents are within the Recommended Operating Conditions and Absolute Maximum Ratings of the device. To maintain output current regulation over the entire input voltage range, design the converter to operate close to fMAX when in full-load conditions. To improve thermal performance, increase the copper area connected to GND pins.