ZHCSDC4 February   2015 UCC28730

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
    1. 5.1 Detailed Pin Description
      1. 5.1.1 VDD (Device Bias Voltage Supply)
      2. 5.1.2 GND (Ground)
      3. 5.1.3 HV (High Voltage Startup)
      4. 5.1.4 DRV (Gate Drive)
      5. 5.1.5 CBC (Cable Compensation)
      6. 5.1.6 VS (Voltage Sense)
      7. 5.1.7 CS (Current Sense)
  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 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 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 Primary-Side Regulation (PSR)
      2. 7.3.2 Primary-Side Constant Voltage Regulation
      3. 7.3.3 Primary-Side Constant Current Regulation
      4. 7.3.4 Wake-Up Detection and Function
      5. 7.3.5 Valley-Switching and Valley-Skipping
      6. 7.3.6 Startup Operation
      7. 7.3.7 Fault Protection
    4. 7.4 Device Functional Modes
  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, CVDD
        7. 8.2.2.7 VS Resistor Divider, Line Compensation, and Cable Compensation
        8. 8.2.2.8 VS Wake-Up Detection
      3. 8.2.3 Application Curves
    3. 8.3 Do's and Don'ts
  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  电容术语（以法拉为单位）
        2. 11.1.1.2  占空比相关术语
        3. 11.1.1.3  频率术语（以赫兹为单位）
        4. 11.1.1.4  电流术语（以安培为单位）
        5. 11.1.1.5  电流和电压调节术语
        6. 11.1.1.6  变压器术语
        7. 11.1.1.7  功率术语（以瓦特为单位）
        8. 11.1.1.8  电阻术语（以 Ω 为单位）
        9. 11.1.1.9  时序术语（以秒为单位）
        10. 11.1.1.10 直流电压术语（以伏特为单位）
        11. 11.1.1.11 交流电压术语（以伏特为单位）
        12. 11.1.1.12 效率术语
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 术语表
  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 UCC28730 is intended for AC-to-DC adapters and chargers with input voltage range of 85 VAC(rms) to 265 VAC(rms) using flyback topology. It can also be used in other applications and converter topologies with different input voltages. Be sure that all voltages and currents are within the recommended operating conditions and absolute maximum ratings of the device.

The DRV output normally begins PWM pulses approximately 55 µs after VDD exceeds the turn-on threshold VVDD(on). Avoid excessive dv/dt on VDD. Positive dv/dt greater than 1 V/µs may delay the start of PWM . Negative dv/dt greater than 1 V/µs on VDD which does not fall below the UVLO turn-off threshold VVDD(off) may result in a temporary dip in the output voltage.