JAJSR89 August   2024 AMC0106M25

ADVANCE INFORMATION  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information (DEN Package)
    5. 5.5 Package Characteristics
    6. 5.6 Electrical Characteristics
    7. 5.7 Switching Characteristics
    8. 5.8 Timing Diagrams
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Analog Input
      2. 6.3.2 Modulator
      3. 6.3.3 Isolation Channel Signal Transmission
      4. 6.3.4 Digital Output
        1. 6.3.4.1 Output Behavior in Case of a Full-Scale Input
        2. 6.3.4.2 Output Behavior in Case of a Missing High-Side Supply
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Shunt Resistor Sizing
        2. 7.2.2.2 Input Filter Design
        3. 7.2.2.3 Bitstream Filtering
        4. 7.2.2.4 Designing the Bootstrap Supply
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 ドキュメントの更新通知を受け取る方法
    3. 8.3 サポート・リソース
    4. 8.4 Trademarks
    5. 8.5 静電気放電に関する注意事項
    6. 8.6 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Mechanical Data

7.2.2.1 Shunt Resistor Sizing

The shunt resistor (RSHUNT) value is determined by the device linear input voltage range (±250mV) and the desired linear current sensing range of ±5A. RSHUNT is calculated as 250mV / 5A = 50mΩ. The peak power dissipated in the shunt resistor is RSHUNT × IPEAK2 = 50mΩ × (5A)2 = 1.25W. For a linear response, operate the shunt resistor at no more than 2/3 of the rated power. Therefore, a shunt resistor with a nominal power rating of approximately 1.8W is selected.

Select a lower shunt resistor value if transient overcurrents are expected in the system that exceed the linear input voltage range of the AMC0106M25. However, if reduced linearity and lower resolution is acceptable for the overcurrent range, allow the voltage drop across the shunt to exceed the linear input voltage range up to the clipping voltage of the AMC0106M25. In any case, make sure the voltage drop caused by the maximum overcurrent does not exceed the input voltage that causes a clipping output. That is, make sure |VSHUNT| ≤ |VClipping|.