AN4068 datasheet(40/63 Pages) STMICROELECTRONICS

Part #	AN4068

Description	ST7580 power line communication system-on-chip design guide

PDF	63 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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40 / 63 page

Reference design standard tests

AN4068

40/63

Doc ID 022923 Rev 2

Figure 29.

Conducted emissions: FSK transmission spectrum, quasi-peak

measurement, 150 kHz - 30 MHz, line-to-earth

Figure 30.

Conducted emissions: FSK transmission spectrum, quasi-peak

measurement, 150 kHz - 30 MHz, neutral-to-earth

8.3

EMI immunity tests

The specific structure of the coupling interface circuit of the application is a weak point

against high-voltage disturbances that can come from the external environment. In fact, an

efficient coupling circuit with low insertion losses realizes, consequently, a low impedance

path from the mains to the power line interface of the device.

For this reason it is recommended to add some specific protection on the mains coupling

path, to prevent high energy disturbances coming from the mains from damaging the

internal power circuitry of the ST7580.

AN4068 Datasheet(PDF) 40 Page - STMicroelectronics