JAJSDC3A June   2017  – August 2018 UCC27712

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      概略回路図
      2.      標準的な伝播遅延の比較
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Dynamic Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 VDD and Under Voltage Lockout
      2. 8.3.2 Input and Output Logic Table
      3. 8.3.3 Input Stage
      4. 8.3.4 Output Stage
      5. 8.3.5 Level Shift
      6. 8.3.6 Low Propagation Delays and Tightly Matched Outputs
      7. 8.3.7 Parasitic Diode Structure
    4. 8.4 Device Functional Modes
      1. 8.4.1 Minimum Input Pulse Operation
      2. 8.4.2 Output Interlock and Dead Time
      3. 8.4.3 Operation Under 100% Duty Cycle Condition
      4. 8.4.4 Operation Under Negative HS Voltage Condition
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Selecting HI and LI Low Pass Filter Components (RHI, RLI, CHI, CLI)
        2. 9.2.2.2 Selecting Bootstrap Capacitor (CBOOT)
        3. 9.2.2.3 Selecting VDD Bypass/Holdup Capacitor (CVDD) and Rbias
        4. 9.2.2.4 Selecting Bootstrap Resistor (RBOOT)
        5. 9.2.2.5 Selecting Gate Resistor RON/ROFF
        6. 9.2.2.6 Selecting Bootstrap Diode
        7. 9.2.2.7 Estimate the UCC27712 Power Losses (PUCC27712)
        8. 9.2.2.8 Estimating Junction Temperature
        9. 9.2.2.9 Operation With IGBT's
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 関連リンク
    3. 12.3 コミュニティ・リソース
    4. 12.4 商標
    5. 12.5 静電気放電に関する注意事項
    6. 12.6 Glossary
  13. 13メカニカル、パッケージ、および注文情報

8.3.5 Level Shift

The level shift circuit (refer to the Functional Block Diagram) is the interface from the high-side input to the high-side driver stage which is referenced to the switch node (HS). It is a pulsed generated level shifter. With an input signal the pulse generator generates "on" pulses based on the rising edge of the signal and "off" pulses based on the falling edge. On pulses and off pulses turn on each branch of the level shifter so that current flows in each branch to generate different voltages, which is transferred to the set and reset signal in the high side. The signal is rebuilt by the RS latch in the high side domain. The level shift allows control of the HO output referenced to the HS pin and provides excellent delay matching with the low-side driver. The delay matching of UCC27712 is summarized in Figure 6 and Figure 7.

The level shifter in UCC27712 offers best-in-class capability while operating under negative voltage conditions on HS pin. The level shifter is able to transfer signals from the HI input to HO output with only 4-V headroom between HB and COM. Refer to Operation Under Negative HS Voltage Condition for detailed explanations.