JAJSCE8B July   2016  – October 2018 TPS61230A

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      代表的なアプリケーション
      2.      効率
  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 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 Startup
      2. 8.3.2 Enable and Disable
      3. 8.3.3 Under-Voltage Lockout (UVLO)
      4. 8.3.4 Current Limit Operation
      5. 8.3.5 Over Voltage Protection
      6. 8.3.6 Load Disconnect
      7. 8.3.7 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 PWM Mode
      2. 8.4.2 PFM Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TPS61230A 2.5-V to 4.5-V Input, 5-V Output Converter
        1. 9.2.1.1 TPS61230A 5-V Output Design Requirements
        2. 9.2.1.2 TPS61230A 5-V Detailed Design Procedure
          1. 9.2.1.2.1 Programming The Output Voltage
          2. 9.2.1.2.2 Inductor and Capacitor Selection
            1. 9.2.1.2.2.1 Inductor Selection
            2. 9.2.1.2.2.2 Output Capacitor Selection
            3. 9.2.1.2.2.3 Input Capacitor Selection
          3. 9.2.1.2.3 Loop Stability, Feed Forward Capacitor
        3. 9.2.1.3 TPS61230A 5-V Output Application Performance Plots
      2. 9.2.2 Systems Example - TPS61230A with Feed Forward Capacitor for Best Transient Response
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  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 デベロッパー・ネットワークの製品に関する免責事項
    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

9.2.1.2.2.1 Inductor Selection

A boost converter requires two main passive components for storing energy during the conversion, an inductor and an output capacitor. It is advisable to select an inductor with a saturation current rating higher than the possible peak current flowing through the power FETs. The inductor peak current varies as a function of the load, the input and output voltages and is estimated using Equation 5.

Equation 5. TPS61230A EQ_Ipeak.gif

Where

η = Power conversion estimated efficiency

Selecting an inductor with the insufficient saturation performance can lead to the excessive peak current in the converter. This could eventually harm the device and reduce reliability. It's recommended to choose the saturation current for the inductor 20%~30% higher than the IL(PEAK), from Equation 5. The following inductors are recommended to be used in designs.

Table 5. List of Inductors

INDUCTANCE [µH] CURRENT RATING [A] DC RESISTANCE [mΩ] PART NUMBER MANUFACTURER
1.0 9.0 12 744 383 560 10 Wurth
1.0 5.1 10.8 XFL4020-102MEB Coilcraft