ZHCSCD4B July   2013  – August 2014 UCC28910

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用范围
  3. 3 说明
  4. 4 简化电路原理图 简化电路原理图
  5. 5 修订历史记录
  6. 6 Terminal Configuration and 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 Output Power
    6. 7.6 Electrical Characteristics
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Detailed Device Description
      1. 8.3.1 VDD (Device Voltage Supply)
      2. 8.3.2 GND (Ground)
      3. 8.3.3 VS (Voltage Sense)
      4. 8.3.4 IPK (Set the Maximum DRAIN Current Peak)
      5. 8.3.5 DRAIN
    4. 8.4 Feature Description
      1. 8.4.1 Primary-Side Voltage Regulation
      2. 8.4.2 Primary-Side Current Regulation
      3. 8.4.3 Voltage Feed Forward Compensation
      4. 8.4.4 Control Law
      5. 8.4.5 Valley Switching
      6. 8.4.6 Startup Operation
      7. 8.4.7 Fault Protection
        1. 8.4.7.1 Output Over-Voltage
        2. 8.4.7.2 Input Under-Voltage
        3. 8.4.7.3 Internal Over-Temperature
        4. 8.4.7.4 Primary Over-Current
        5. 8.4.7.5 Maximum tON
        6. 8.4.7.6 VDD Clamp Over-Current
    5. 8.5 Device Functional Modes
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Battery Charger, 5 V, 6 W
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1  Power Handling Curves
          2. 9.2.1.2.2  Definition of Terms
          3. 9.2.1.2.3  Maximum Target Switching Frequency
          4. 9.2.1.2.4  Transformer Turns Ratio, Inductance, Primary-Peak Current
          5. 9.2.1.2.5  Bulk Capacitance
          6. 9.2.1.2.6  Output Capacitance
          7. 9.2.1.2.7  VDD Capacitance, CVDD
          8. 9.2.1.2.8  VS Resistor Divider
          9. 9.2.1.2.9  RVDD Resistor and Turn Ratio
          10. 9.2.1.2.10 Transformer Input Power
          11. 9.2.1.2.11 RIPK Value
          12. 9.2.1.2.12 Primary Inductance Value
            1. 9.2.1.2.12.1 Secondary Diode Selection
          13. 9.2.1.2.13 Pre-Load
          14. 9.2.1.2.14 DRAIN Voltage Clamp Circuit
        3. 9.2.1.3 Application Curves
        4. 9.2.1.4 Average Efficiency Performance and Standby Power of the UCC28910FBEVM-526
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 文档支持
      1. 12.1.1 相关文档
    2. 12.2 商标
    3. 12.3 静电放电警告
    4. 12.4 术语表
  13. 13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

11 Layout

11.1 Layout Guidelines

In order to increase the reliability and feasibility of the project it is recommended to follow the here below guidelines.

  1. Place the RIPK resistance as close as possible to the device with the shortest available traces.
  2. Try to minimize the area of DRAIN trace, this helps in keeping EMI disturbance low.
  3. A copper area connected to the GND terminals improves heat sinking thermal performance.
  4. A copper area connected to anode and cathode secondary diode improves heat sinking with an emphasis on the quiet area of the diode, the diode connected to the output capacitor, this limits the EMI disturbance.
  5. Place the auxiliary voltage sense resistor divider (RS1 and RS2 in Figure 41) directly on the VS pin keeping traces as short as possible.

11.2 Layout Example

testsetup_lus769.gifFigure 41. UCC28910 Layout Example