ST-PLC-AFE datasheet(43/58 Pages) STMICROELECTRONICS

Part #	ST-PLC-AFE

Description	Power-line communication, analog front-end

PDF	58 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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43 / 58 page

DocID028727 Rev 1

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ST-PLC-AFE

Application information

10.3

Moving from differential mode to single-ended mode

Differential mode can drive extremely low impedances, even at low supply voltage.

However, differential mode also activates two PAs at the same time which increases the

internal temperature (see Figure 45).

Figure 45. Temperature elevation in differential-ended and single-ended modes vs

power supply voltage

To minimize the dissipated power and thus the temperature elevation, it is recommended to

use the minimum power supply voltage.

In Figure 45, the temperature elevation was monitored after a “waiting” time to achieve a

stable temperature. Such “waiting” time and the temperature elevation depends on the

number of PCB layers, copper thickness, PCB area, and PCB layout. Figure 46 is an

example of temperature elevation over time for the following board features: 24 cm², 4-layer

PCB, and 35 µm copper thickness.

ST-PLC-AFE Datasheet(PDF) 43 Page - STMicroelectronics