0557-7700-42--Datasheet/数据表在线中文翻译

POWERLINE SIGNAL COUPLER

0557-7700-42 for 500Mbps Modules

Bel 0557-7700-42 is a member of the coupling signal transformers

family developed for a wide range of applications based on the QCA

HomePlug AV powerline chipsets and is compatible with the Bel

500Mbps modules. The transformer provide a low cost and high

quality solution to simplify the implementation HomePlug AV

products.

This signal transformer provides complete isolation, coupling

solution and is designed to complement Bel’s 0804-5000A50, 0804-

5000E50, 0804-5000A51, 0804-5000E51 and 0804-5000V51

HomePlug AV Powerline modules.

Key Features & Benefits



Designed for use with the Bel HPAV modules range

Provides reinforced isolation for worldwide application

Minimum footprint design

Wide operating temperature range -40°C – +85°C

Model

Part Number

0557-7700-42

Temp Range

Description

Package

-40°C – +85°C

Signal coupler for powerline 500Mbps modules

Boxed

Bel Modules

28 Turkey Court, Turkey Mill, Ashford Road

Maidstone ME14 5PP UK

+44 1622 757 395

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Rev A

Powerline Signal Couplers

0557-7700-42 for 500Mbps Modules

Electrical Specifications @ 25˚ C

Part Number

Parameter

Pin Number

Value

Inductance @ 500KHz, 0.1V

Turns Ratio

1 - 2

7.7uH min

1 : 1

1 - 2 : 3 - 4

1 - 2 : 5 - 8

1 - 2, 3 - 4, 5 - 8

1 + 3 : 5

0557-7700-42

Turns Ratio

1 : 1

DCR

40mΩ max

4KVDC for 60 sec

Hi-Pot @ 3mA

Schematics

0557-7700-42

Application Notes

The following schematic show typical application for the Bel HomePlug AV Powerline modules, with the appropriate couples

and associated circuitry. The following notes should be observed.

[1] Inductors L1, L2 and L3, L4 provide high frequency isolation which is particularly important with switching power supplies

where a capacitor is present across the input terminals. The inductors should have a good performance in the Powerline

band between 2 and 68 MHz

[2] DC blocking capacitor C1 should be an X2 class device (AC Mains applications).

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Powerline Signal Couplers

0557-7700-42 for 500Mbps Modules

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Powerline Signal Couplers

0557-7700-42 for 500Mbps Modules

PCB Layout Considerations

[1] Trace widths for the TX and RX signals to the coupling transformer should be between 0.020” (0.5mm) and 0.030”

(0.75mm) in order to accommodate the low impedances involved and the high current densities.

[2] Trace width between the powerline side of the coupling transformer and the actual powerline should be no less than

0.025” to 0.050” (1.25mm).

[3] These trace lengths should be kept as short as possible for a good high frequency performance.

[4] Parallelism (differential transmission line layout technique) should be used throughout for these threes signal pairs.

[5] Do not place these tracks between layers in a multilayer PCB as this degrades performance.

Mechanical

RECOMMENDED PCB LAYOUT

TOP VIEW

0.100 [2.54]

IN 4 PLACES

R0.020 [R0.51]

0557-7700-42

(D C)

0.555

[14.10]

MAX

PIN 1

0.200 [5.08]

IN 2 PLACES

END VIEW

SIDE VIEW

0.020 ±0.002

[0.51 ±0.05]

CP WIRE

100% TIN PLATED

0.195

[4.95]

REMOVED

Dimensions shown are in inches [mm]

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