JAJS771H October   1999  – October 2018 LM4041-N , LM4041-N-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      ブロック図
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2.     Pin Functions: ADJ Pinouts
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  LM4041-N-xx 1.2 Electrical Characteristics (Industrial Temperature Range)
    6. 6.6  LM4041-N-xx 1.2 Electrical Characteristics (Industrial Temperature Range)
    7. 6.7  LM4041-N-xx 1.2 Electrical Characteristics (Extended Temperature Range)
    8. 6.8  LM4041-N-xx ADJ (Adjustable) Electrical Characteristics (Industrial Temperature Range)
    9. 6.9  LM4041-N-xx ADJ (Adjustable) Electrical Characteristics (Extended Temperature Range)
    10. 6.10 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Shunt Regulator
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Adjustable Shunt Regulator
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detail Design Procedure
      3. 9.2.3 Bounded Amplifier
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detail Design Procedure
        3. 9.2.3.3 Application Curve
      4. 9.2.4 Voltage Level Detector
        1. 9.2.4.1 Design Procedure
        2. 9.2.4.2 Detail Design Procedure
      5. 9.2.5 Precision Current Sink and Source
        1. 9.2.5.1 Design Requirements
        2. 9.2.5.2 Detailed Design Procedure
      6. 9.2.6 100-mA Current Source
        1. 9.2.6.1 Design Requirements
        2. 9.2.6.2 Detailed Design Procedure
      7. 9.2.7 LM4041 in Clamp Circuits
        1. 9.2.7.1 Design Requirements
        2. 9.2.7.2 Detailed Design Procedure
      8. 9.2.8 Floating Current Detector
        1. 9.2.8.1 Design Requirement
        2. 9.2.8.2 Detailed Design Procedure
  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 関連リンク
    2. 12.2 ドキュメントの更新通知を受け取る方法
    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

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

9.2.3.2 Detail Design Procedure

With amplifier rails of ±15 V, the output can be bound to ±11.5 V with the LM4041 adjustable set for 10 V and two nominal diode voltage drops of 0.7 V.

Equation 9. VOUTBOUND = 2 × VFWD + VZ
Equation 10. VOUTBOUND = 1.4 V + 10 V

Select RS = 15 kΩ to keep LR low. Calculate LR to confirm RS selection.

Use Equation 11, but in this case, take the negative supply into account.

Equation 11. lR = (VIN – VOUT) /R
Equation 12. lR = (VIN+ – VIN – VOUT) / R = (30 V – 10 V) / (RS1 + RS2) = 20 V / 30 kΩ = 0.667 mA

This is an acceptable value for lR that does not draw excessive current, but prevents the part from being starved for current.