SBFS042 June   2020 AFE3010


  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      GFCI Application
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  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 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Powering The AFE3010
      2. 7.3.2 Sensing Amplifier
      3. 7.3.3 Noise Filter
      4. 7.3.4 ALARM (LED) Driver
      5. 7.3.5 Phase Detection
      6. 7.3.6 SCR Control
      7. 7.3.7 Self-Test Function
        1. Periodic Self-Test
        2. Continuous Self-Test
    4. 7.4 Device Functional Modes
      1. 7.4.1 Pin Configuration
      2. 7.4.2 ALARM Modes to Drive LED
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Manual Self-Test Using PTT Pin
        1. Successful Self-Test
        2. Unsuccessful Self-Test
      2. 8.1.2 ALARM and RESET Function With SW_OPEN
        1. No Self-Test Fail Event
        2. Self-Test Fail Event
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 What to Do and What Not to Do
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Periodic Self-Test

At system power up, the self-test starts after 60 cycles of power line signal, and retests within 60 cycles if the first self-test fails. Five consecutive self-test fails drive the SCR and assert the ALARM signal blinking at 1-second intervals (for 60-Hz systems). After the first self-test pass, the device fires ALARM for 250-ms period to indicate the successful pass of the first self-test. During normal operating conditions, the self-test repeats every 180 cycles. Figure 10 shows the periodic self-test sequences and decision blocks. The device requires one cycle from the AC power line to complete the periodic self-tests listed below:

  1. Ground Fault Test: the AFE3010 generates a fault current through the FT pin. The device reads a test pass if the AFE3010 detects the fault current through the transformer. If the fault current is not detected, the device reads a test fail. This fail event triggers another self-test within next 60 cycles. After five consecutive fails, the AFE3010 fires the SCR and sets the ALARM blinking at 1-s intervals (for 60-Hz systems). The ground fault test covers the integrity check of the transformer, fault current generator components, feedback resistors, and the AFE3010 fault detection circuits.
  2. SCR Integrity Test: The AFE3010 performs SCR integrity test after completing the ground fault test. The device induces a SCR anode signal transition with the help of SCR_TST pin. If the SCR anode signal low transition is not detected, the AFE3010 reads a test fail. This fail event triggers another self-test within next 60 cycles. After five consecutive fails it fires the SCR and sets ALARM blinking at 1-s intervals (for 60-Hz systems).