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

6 Terminal Configuration and Functions

D (SOIC) PACKAGE
7 TERMINALS
(TOP VIEW)
pin_lus769.gif

Terminal Functions

TERMINAL I/O DESCRIPTION
NAME NO.
GND 1, 2, 3 G The ground terminals (GND) are both the reference terminals for the controller and the low-side return for the drive output. Special care should be taken to return all AC decoupling as close as possible to this terminal and avoid any common trace length with analog signal return paths.
IPK 4 I IPK is used to set the maximum peak current flowing in the power FET that is proportional to the maximum output current.
VS 5 I Voltage Sense (VS) is used to provide voltage and timing feedback to the controller. Normally this terminal is connected to a voltage divider between an auxiliary winding and ground. The value of the upper resistor of this divider is used to program low line thresholds.
VDD 6 P VDD is the supply terminal to the controller. A carefully placed bypass capacitor to GND is required on this terminal.
N/A 7 N/A This pin is not present to provide enough distance between high voltage terminal (DRAIN) and the other pins
DRAIN 8 P DRAIN, the drain of the internal power FET, but also the input for the high-voltage current source used to start up the device.