SBFS042 June 2020 AFE3010
Figure 7 shows the recommended components and configurations to develop a GFCI system using the AFE3010. The AFE3010 features an internal 20-V shunt regulator that connects to an external rectifier output through limiting resistors R1 and R2. The two separate VDD and GND pins offer redundancy during single component failure events in GFCI systems. An internal 5-V rail powers the majority of the internal circuitry, and drives all the signal pins except the NG_OUT, PH, and SCR_TST pins. The NG_OUT pin is referenced to the 20-V VDD through an internal reverse blocking diode inside the device.