1 Features

1• Single-chip GFCI controller to aid in the design of

UL-943 compliant systems

– Built-in self-test to detect end-of-life, blink the

LED, and/ or trip 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

– 150 ms for ±5mA ground fault current

– 85 ms for ±10-mA ground fault current

– 40 ms for ±30-mA ground fault current

– 10 ms for ±50-mA ground fault current

• Onboard shunt regulator powers the system

through passives

• Supports 120-V/ 60-Hz or 220-V/ 50-Hz systems

• Operating temperature range: –40 ºC to 105 ºC

2 Applications

• GFCI Outlet Receptacles

• GFCI Circuit Breakers

• Power Cord (In-Line GFCI)

• Hair Dryer

• Dish Washer

3 Description

The AFE3010 is a precision, low-power, Ground Fault

Circuit Interrupter (GFCI) controller used for detecting

ground fault leakage paths in electrical circuits. This

device 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 a ground fault leakage detection, the

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. Periodic self-test is performed

once in every 180 cycles of the AC power line to

ensure all the components related to 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 purpose.

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.