JAJSFO7D March   2008  – November 2023 UCC27324-Q1

PRODUCTION DATA  

  1.   1
  2. 特長
  3. アプリケーション
  4. 概要
  5. Pin Configuration and Functions
  6. Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Overall Electrical Characteristics
    6. 5.6  Power Dissipation Characteristics
    7. 5.7  Input (INA, INB) Electrical Characteristics
    8. 5.8  Output (OUTA, OUTB) Electrical Characteristics
    9. 5.9  Switching Characteristics
    10. 5.10 Typical Characteristics
  7. Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Input Stage
      2. 6.3.2 Output Stage
    4. 6.4 Device Functional Modes
  8. Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Parallel Outputs
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Propagation Delay
        2. 7.2.2.2 Source and Sink Capabilities During Miller Plateau
        3. 7.2.2.3 Supply Voltage (VDD)
        4. 7.2.2.4 Drive Current and Power Requirements
      3. 7.2.3 Application Curve
  9. Power Supply Recommendations
  10. Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
    3. 9.3 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 サード・パーティ製品に関する免責事項
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 ドキュメントの更新通知を受け取る方法
    4. 10.4 サポート・リソース
    5. 10.5 Trademarks
    6. 10.6 静電気放電に関する注意事項
    7. 10.7 用語集
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Application Information

High-frequency power supplies often require high-speed high-current drivers such as the UCC27324-Q1 device. A leading application is the need to provide a high-power buffer stage between the PWM output of the control device and the gates of the primary power MOSFET or IGBT switching devices. In other cases, the driver is used to drive the power device gates through a drive transformer. Synchronous rectification supplies must also simultaneously drive multiple devices, which can present an extremely large load to the control circuitry.

Drivers are used when using the primary PWM regulator to directly drive the switching devices is not feasible for one or more reasons. The PWM device may not have the brute drive capability required for the intended switching MOSFET, limiting the switching performance in the application. In other cases, minimizing the effect of high-frequency switching noise by placing the high-current driver physically close to the load may be necessary. Also, newer devices that target the highest operating frequencies may not incorporate onboard gate drivers at all. The PWM outputs are intended to drive only the high-impedance input to a driver such as the UCC27324-Q1. Finally, the control device may be under thermal stress because power dissipation, and an external driver can help by moving the heat from the controller to an external package.