SBASAD0A March   2022  – July 2022 AMC23C10

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 Isolation Channel Signal Transmission
      3. 7.3.3 Digital Outputs
      4. 7.3.4 Power-Up and Power-Down Behavior
      5. 7.3.5 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 Application
      1. 8.2.1 Voltage Zero-Crossing Detection
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
      4. 8.2.4 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

8.2.1 Voltage Zero-Crossing Detection

In AC power-switching applications, closing the load switch during the zero-crossing of the AC line voltage minimizes the inrush current during turn-on. Figure 8-1 shows the implementation of a solid-state relay based on the TPSI3050-Q1 device. The TPSI3050-Q1 is an isolated switch driver with an integrated 10-V gate supply. The two external, back-to-back, n-type field effect transistor (NMOS) power switches are turned on when the EN pin of the TPSI3050-Q1 is driven high and are turned off when the EN pin is low. The AMC23C10 is used in this application to detect the zero crossing of the AC line voltage and to gate the EN signal to the TPSI3050-Q1. The high-side of the AMC23C10 is powered from the integrated 10-V gate drive supply of the TPSI3050-Q1 and does not require a separate power supply for the high-side.

Figure 8-1 Using the AMC23C10 for AC Voltage Zero-Crossing Detection in a Solid-State Relay (SSR)

The AC line voltage is clamped by R5 and two small-signal, antiparallel diodes to limit the voltage at the input of the AMC23C10. Close to the zero crossing of the AC line voltage, neither one of the diodes conduct and the voltage at the INP pin equals the AC line voltage. As illustrated in Figure 8-2, OUT1 (an open-drain output) toggles from high-to-low during the rising zero-crossing event and from low-to-high during the falling zero-crossing event. OUT2 (a push-pull output) toggles with the opposite polarity and can be used in a discrete logic block or my a microcontroller to gate the EN signal of the TPSI3050-Q1.

Figure 8-2 Output of the AMC23C10 Used in a Voltage Zero-Crossing Detection Circuit