This application note describes the reference design of the ST7580 power line networking system-on-chip. The reference design can be used to evaluate the transmission and reception performance of a power line communication node based on the ST7580 device.
The document provides a comprehensive design guide for the ST7580 power line communication (PLC) system-on-chip. It details an evaluation board that allows users to evaluate transmitting and receiving performance on the AC mains line using FSK and PSK modes within the CENELEC EN50065-1 standard A band.
The guide covers the reference design description, including line coupling sections (transmission active filter, reception passive filter, power line coupling, zero crossing coupling) and STM32 microcontroller integration. It also includes electrical characteristics, safety recommendations, test and measurement tool descriptions, and specific PCB layout guidelines for thermal performance and ground connections.
| Ambient operating temperature | -40 to 85 °C |
|---|---|
| ST7580 thermal resistance | 50 °C/W |
| Transmitted signal bandwidth (FSK) | 20 kHz |
| Transmitted output current limit | 1 Arms |
| Reception filter -3 dB bandwidth | 65 kHz |
| Transformer isolation | 4 kV |
| VCC power supply voltage range | 8 to 18 V |
The circuit is designed to operate within the European CENELEC EN50065-1 standard A band.
An STM82 microcontroller is included to make the design flexible for use as a standalone smart PLC node.
The system supports 9600 baud for FSK and PSK modes.