+

±

LV

Capacitor

PA

Supply

Power

Amplifier

+

N1

+

N2

HV

Capacitor

L

Phase

Neutral

+

-

9

OPA521

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SBOS872 – MAY 2018

Product Folder Links: OPA521

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Copyright © 2018, Texas Instruments Incorporated

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The OPA521 is an integrated, power line communication power amplifier that transmits PLC data onto power

lines through a line-coupling circuit.

8.2 Typical Application

A schematic for a typical application is provided in Figure 1.

Figure 1. Typical Line Coupling Circuit

8.2.1 Design Requirements

For typical power line applications, use the following parameters:

Table 1. Power-Supply Requirements

PARAMETER

FSK OR SFSK

PRIME OR G3 OFDM

UNITS

Frequency range

63 to 74

35 to 95

kHz

2

2

Ω

1

1

1.414

3

2.828

6

OFDM multiplier

—

1.5

—

2

2

V

Turns ration, N1/N2

1.5

1.5

—

PA supply

8.25

17.5

V

Example: