SBAS945A February   2022  – July 2022 AMC23C14

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 Diagrams
    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 Reference Input
      3. 7.3.3 Isolation Channel Signal Transmission
      4. 7.3.4 Open-Drain Digital Outputs
      5. 7.3.5 Power-Up and Power-Down Behavior
      6. 7.3.6 VDD1 Brownout and Power-Loss Behavior
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Overcurrent and Short-Circuit Current Detection
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
      2. 8.2.2 Overvoltage and Undervoltage Detection
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    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

7.3.6 VDD1 Brownout and Power-Loss Behavior

Brownout is a condition where the VDD1 supply droops below the specified operating voltage range but the device remains functional. Power-loss is a condition where the VDD1 supply drops below a level where the device stops being functional. Depending on the duration and the voltage level, a brownout condition may or may not be noticeable at the output of the device. A power-loss condition is always signaled on the output of the isolated comparator.

Figure 7-11 through Figure 7-13 show typical brownout and power-loss scenarios.

In Figure 7-11, VDD1 droops below the undervoltage detection threshold (VDD1UV) but recovers before the high-side-fault detection delay time (tHS,FLT) expires. The brownout event has no effect on the comparator outputs.

In Figure 7-12, VDD1 droops below the undervoltage detection threshold (VDD1UV) for more than the high-side-fault detection delay time (tHS,FLT). The brownout condition is detected as a fault and both outputs are pulled low after a delay equal to tHS,FLT. The device resumes normal operation as soon as VDD1 recovers above the VDD1UV threshold.

Figure 7-11 Output Response to a Short Brownout Event on VDD1
Figure 7-12 Output Response to a Long Brownout Event on VDD1

In Figure 7-13, VDD1 droops below the power-on-reset (POR) threshold (VDD1POR). The power-loss condition is detected as a fault and both outputs are pulled low after a delay equal to tHS,FLT. The device resumes normal operation after a delay equal to tHS,STA + tHS,BLK after VDD1 recovers above the VDD1UV threshold.

Figure 7-13 Output Response to a Power-Loss Event on VDD1