JAJSH18A March   2019  – September 2019 TPS7A78

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      ハーフブリッジ構成の標準的な回路図
      2.      フルブリッジ構成の標準的な回路図
  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 Timing Requirements
    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 Active Bridge Control
      2. 8.3.2 Full-Bridge (FB) and Half-Bridge (HB) Configurations
      3. 8.3.3 4:1 Switched-Capacitor Voltage Reduction
      4. 8.3.4 Undervoltage Lockout Circuits (VUVLO_SCIN) and (VUVLO_LDO_IN)
      5. 8.3.5 Dropout Voltage Regulation
      6. 8.3.6 Current Limit
      7. 8.3.7 Programmable Power-Fail Detection
      8. 8.3.8 Power-Good (PG) Detection
      9. 8.3.9 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation
      2. 8.4.2 Dropout Mode
      3. 8.4.3 Disabled Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Recommended Capacitor Types
      2. 9.1.2 Input and Output Capacitors Requirements
      3. 9.1.3 Startup Behavior
      4. 9.1.4 Load Transient
      5. 9.1.5 Standby Power and Output Efficiency
      6. 9.1.6 Reverse Current
      7. 9.1.7 Switched-Capacitor Stage Output Impedance
      8. 9.1.8 Power Dissipation (PD)
      9. 9.1.9 Estimating Junction Temperature
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Calculating the Cap-Drop Capacitor CS
          1. 9.2.2.1.1 CS Calculations for the Typical Design
        2. 9.2.2.2 Calculating the Surge Resistor RS
          1. 9.2.2.2.1 RS Calculations for the Typical Design
        3. 9.2.2.3 Checking for the Device Maximum ISHUNT Current
          1. 9.2.2.3.1 ISHUNT Calculations for the Typical Design
        4. 9.2.2.4 Calculating the Bulk Capacitor CSCIN
          1. 9.2.2.4.1 CSCIN Calculations for the Typical Design
        5. 9.2.2.5 Calculating the PFD Pin Resistor Dividers for a Power-Fail Detection
          1. 9.2.2.5.1 PFD Pin Resistor Divider Calculations for the Typical Design
        6. 9.2.2.6 Summary of the Typical Application Design Components
      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 デバイス・サポート
      1. 12.1.1 開発サポート
        1. 12.1.1.1 評価基板
        2. 12.1.1.2 SIMPLIS モデル
      2. 12.1.2 デバイスの項目表記
    2. 12.2 ドキュメントのサポート
      1. 12.2.1 関連資料
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 コミュニティ・リソース
    5. 12.5 商標
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 Glossary
  13. 13メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

9.2.2.6 Summary of the Typical Application Design Components

Table 4 summarizes the component values chosen through the design process for this application example.

Table 4. Typical Application Design Example Components

COMPONENT CALCULATED VALUE
CS 330 nF, capacitance loss under long-term service is inevitable and must be considered in the design.
RS 400 Ω, see the Checking for the Device Maximum ISHUNT Current section for the RS power-rating calculation.
CSCIN 47 µF, approximate the 49.2-µF capacitor value resulting from the Calculating the Bulk Capacitor CSCIN section.
CSC1 1 µF, select the minimum capacitor value specified in the Recommended Operating Conditions table.
CSC2 1 µF, select the minimum capacitor value specified in the Recommended Operating Conditions table.
CLDO_IN 1 µF, select the typical capacitor value specified in the Recommended Operating Conditions table.
CLDO_OUT 1 µF, select the typical capacitor value specified in the Recommended Operating Conditions table.
R1 200 kΩ, select the maximum resistor value specified in the Recommended Operating Conditions table.
R2 18.7 kΩ, approximate the 18.3-kΩ resistor value from the PFD Pin Resistor Divider Calculations for the Typical Design section.
R3 and R4 100 kΩ, select the maximum resistor values specified in the Recommended Operating Conditions table.