The standard approach to communication over powerlines using the THVD8000 or THVD8010 faces significant obstacles. The first obstacle is the lack of drive strength for loads below 375 Ω; however, the solution to this problem is simple – the addition of a line driver amplifier such as the THS6222. The benefit of this implementation is that larger output voltages can be sustained with more current over lower impedance loads for which a traditional RS-485 driver is specified. The line driver must be able to operate at the modulation frequency chosen and be able to transmit valid data at the specified line to ground impedance of the system, which requires high linearity under heavy line loads. The device doesn’t need to be rated for the AC mains voltage as a protection circuit, transformer, and high voltage capacitor all stand in between the mains voltage and the line driver. The addition of the line driver amplifier like the THS6222 or similar devices can increase the max load from 375 Ω down to between 1 and 5 Ω