0557-7700-42 [BEL]
Telecom Transformer,;
| 型号： | 0557-7700-42 |
| 厂家： | 
BEL FUSE INC. |
| 描述： | Telecom Transformer, 变压器 |
| 文件： | 总4页 (文件大小：423K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
techhelp@belf.com
belfuse.com
© 2019 Bel Power Solutions, Inc.
[1]
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).
techhelp@belf.com
belfuse.com
[2]
Powerline Signal Couplers
0557-7700-42 for 500Mbps Modules
techhelp@belf.com
belfuse.com
[3]
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]
PIN
REMOVED
Dimensions shown are in inches [mm]
techhelp@belf.com
belfuse.com
[4]
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