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Texas Instruments AFE3010 Precision GFCI Controller

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Texas Instruments AFE3010 Precision Ground Fault Circuit Interrupter (GFCI) Controller is used for detecting ground fault leakage paths in electrical circuits. The Texas Instruments AFE3010 is a single IC solution that continuously monitors an electrical circuit for multiple fault conditions to verify that the system is operating correctly.

In addition to ground fault leakage detection, the Texas Instruments AFE3010 can detect a grounded neutral condition, which can also lead to a harmful shock from a connected appliance. The device implements a unique closed-loop grounded neutral detection scheme that eliminates the need for component resonance tuning, resulting in optimized system development time. A periodic self-test is performed once in every 180 cycles of the AC power line to ensure all the components related to the ground fault control system are working properly. In case of any component failure, the device enables an LED light and/or trips a solenoid to open the load switch. In applications where an LED light indicator is not needed, the ALARM pin can be configured as a secondary SCR driver to drive an additional solenoid for redundancy purposes.

The AFE3010 integrates shunt and LDO regulators to directly power from an AC line through a diode bridge and passive components. The AFE3010 offers flexible configurable options to implement robust application-specific protection schemes in different end-equipments such as electrical receptacles, circuit breakers, and so forth.

  • Single-chip GFCI controller to aid in the design of UL-943 compliant systems
    • Built-in self-test to detect end-of-life, blinks the LED and/or trips the load switch
    • Detect ground fault leakage path and trip the load switch
    • Detect neutral-ground leakage path and trip the load switch
  • Protection against single-component failure
  • Dual VDD and GND pins for redundancy
  • Integrated noise filter to prevent false trips
  • Simultaneously protects against HOT to GND and neutral to GND faults
  • Adjustable fault current thresholds through external feedback resistors
  • Fast response time
    • 150ms for ±5mA ground-fault current
    • 85ms for ±10mA ground-fault current
    • 40ms for ±30mA ground-fault current
    • 10ms for ±50mA ground-fault current
  • Onboard shunt regulator powers the system through passives
  • Supports 120V/60Hz or 220V/50Hz systems
  • Operating temperature range: –40ºC to 105ºC



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