SBASAI2 July   2022 AMC1400-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  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  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values
    9. 6.9  Electrical Characteristics
    10. 6.10 Switching Characteristics
    11. 6.11 Timing Diagram
    12. 6.12 Insulation Characteristics Curves
    13. 6.13 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Input
      2. 7.3.2 Isolation Channel Signal Transmission
      3. 7.3.3 Analog Output
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Insulation Coordination
        2. 8.2.2.2 Input Filter Design
        3. 8.2.2.3 Differential to Single-Ended Output Conversion
      3. 8.2.3 Application Curve
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2 Typical Application

Figure 8-1 depicts a simplified block diagram of a DC/DC converter for an 800-V battery system where the AMC1400-Q1 is used to measure the input current on the high-voltage side. The DC bus current flows through a shunt resistor (RSHUNT) and produces a voltage drop that is sensed by the AMC1400-Q1. The AMC1400-Q1 outputs a differential analog voltage that is proportional to the input signal and galvanically isolated from the high-voltage side. The differential output voltage is typically routed to an analog-to-digital converter (ADC) of a microcontroller (MCU) to complete the current-sensing signal chain. The AMC1411-Q1 is used in the same application for measuring the DC bus voltage. Both devices share a common high-side power supply based on the SN6501-Q1 push-pull driver and a transformer that supports the desired isolation voltage ratings.

The stretched SOIC package, differential input, differential output, and the high common-mode transient immunity (CMTI) of the AMC1400-Q1 ensure reliable and accurate operation in high-noise environments while meeting IEC standards for reinforced isolation at 1 kV and higher working voltages.

Figure 8-1 Using the AMC1400-Q1 for Current Sensing in a Typical Application