One remaining challenge is presented with this type of circuit implementation – how to power it. There are two different power supplies used in this application:

1. The Line Driver and Protection Circuitry Source.
2. The THVD8000/THVD8010 + MCU/Related Devices VCC. Since this system is directly attached to a power line – the power should be sourced from here.

The first option is an offline converter which will take a rectified signal (AC) and step it down to the line driver voltage. The line driver power supply voltage is going to be larger than what the MCU/THVD8000/8010 can handle so another SMPS must be added to provide power for these objects as well. An optional LDO can also be used to get a smoother power signal for the MCU/THVD8000/THVD8010 devices. Some good devices to look at are the UCC28880 Offline Converter for the first stage of the power tree and then have that feed into a TPS62177 to generate the low VCC voltage for the THVD8000/THVD8010 and the MCU. The UCC28880 EVM also comes with a rectifier that can be used for AC applications. Check these device datas heets for instructions on how to set your voltages.