SBASB00 August   2024 AMC3306M25-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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
    5. 5.5  Power Ratings
    6. 5.6  Insulation Specifications
    7. 5.7  Safety-Related Certifications 
    8. 5.8  Safety Limiting Values
    9. 5.9  Electrical Characteristics
    10. 5.10 Switching Characteristics
    11. 5.11 Timing Diagrams
    12. 5.12 Insulation Characteristics Curves
    13. 5.13 Typical Characteristics
  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 High-Side Supply Failure
      5. 6.3.5 Isolated DC/DC Converter
      6. 6.3.6 Diagnostic Output
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Digital Filter Usage
    2. 7.2 Typical Application
      1. 7.2.1 Onboard Charger (OBC) Application
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Shunt Resistor Sizing
          2. 7.2.1.2.2 Input Filter Design
          3. 7.2.1.2.3 Bitstream Filtering
        3. 7.2.1.3 Application Curve
      2. 7.2.2 Best Design Practices
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.6 Diagnostic Output

As shown in Figure 6-7, monitor the open-drain DIAG pin to confirm the device is operational and the output data are valid. During power-up, the DIAG pin is actively held low until the high-side supply is in regulation and the modulator starts outputting data. The DIAG pin is actively pulled low if:

  • The low side does not receive data from the high side (for example, because of a loss of power on the high side). The modulator outputs a constant bitstream of logic 0's in this case, that is, the DOUT pin is permanently low.
  • The high-side DC/DC output voltage (DCDC_OUT) or the high-side LDO output voltage (HLDO_OUT) drop below the respective undervoltage detection thresholds (brown-out). In this case, the low-side still receives data from the high-side but the data is potentially invalid. However, the modulator outputs a constant bitstream of logic 0's in this case, meaning that the DOUT pin is permanently low.
AMC3306M25-Q1 DIAG and Output Under Different Operating Conditions Figure 6-7 DIAG and Output Under Different Operating Conditions