433003036881 [YAGEO]
Data Line Filter, 2 Function(s),;
| 型号： | 433003036881 |
| 厂家： | 
YAGEO CORPORATION |
| 描述： | Data Line Filter, 2 Function(s), |
| 文件： | 总6页 (文件大小：66K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Philips Components
Magnetic Products
SMD Common Mode Chokes
SMD Common Mode Chokes
OPERATING PRINCIPLE
Interferences propagating via supply or signal lines can be suppressed by placing a high impedance in series. This can be
provided by a ferrite inductor. However, saturation by the supply current can be a problem. Remedies are a low
permeability material or a gapped / open magnetic circuit. The disadvantage is the large number of turns required to
achieve the required inductance, leading to high copper losses. With standard suppression methods in a signal path, the
wanted signal is often suppressed along with the interference, and in many modern applications (EDP for instance) this
leads to unacceptable loss of signal. This can be overcome with
, based on the fact that supply or
current compensation
signal currents in both lines are opposite and have equal magnitude.
In Philips’ new interference-suppression beads, a pair of conductors within a single soft-ferrite block are connected along
their lengths by an air gap. Common-mode signals - interference signals passing in the same direction along the input and
output channels of a device (a IC for instance) - serve to reinforce the magnetic flux around both conductor, and are
therefore attenuated. In contrast, the wanted signal passing along the input and output channels serves to cancel the flux
around the conductors and therefore passes unattenuated.
These common mode chokes are available in 2 sizes in
material with 2 different winding configurations.
4S2
In combination with appropriate tracks on the PCB the products can also serve as
.
MULTI-TURN CHOKE
TRANSFORMER
The main application areas for the SMD common mode choke can be found in e.g.
Electronic data processing
Telecommunication
Consumer electronics
Domestic appliances
November 1994
14
Magnetic Products
Philips Components
SMD Common Mode Chokes
FEATURES
Resistant to mechanical shocks and pressure
High resistivity material
Low tolerances of mechanical dimensions enable automatic mounting
Flat sides to improve handling by automatic placement machines
Low leakage inductance
Suitable for different functions, depending on PCB connections
APPLICATIONS
EMI suppression
Supply line filtering
Data line filtering
TYPE DESCRIPTION
e.g.
CMS2-5.6/3/4.8-4S2
(1) (2) (3)(4)(5) (6)
(1)Product type (CMS=Common Mode Surface mountable choke)
(2)Number of strips
(3)Width nominal (in mm)
(4)Height maximum including wire (in mm)
(5)Length nominal including wire (in mm)
(6)Material grade
PACKAGING AND ORDERING CODES (11 NC)
(Type number CMS2-5.6/3/4.8-4S2)
(Type number CMS4-11/3/4.8-4S2)
4330 030 36881
4330 030 36911
The first 11 digits of the 12 NC are sufficient to order the desired SMD bead.
SMD common mode chokes are delivered taped and reeled, ready for use on automatic mounting machines.
Packaging is according to IEC 286-A and EIA 481-A.
Packing quantity: 2400 Pcs./Reel
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November 1994
Philips Components
Magnetic Products
SMD Common Mode Chokes
+
_
1.27 0.07
+
_
4.75
0.3
+
_
1.33 0.2
>1.1
>1.2
max
3.04
+
_
5.6
0.2
0.2
Fig.1 SMD common mode choke with two conductors (CMS2-5.6/3/4.8)
>1.1
>1.2
+
_
4.75
0.3
0.2
+
_
+
_
1.27 0.07
1.33 0.2
max
3.04
+
_
10.8 0.3
Fig.2 SMD common mode choke with four conductors (CMS4-11/3/4.8)
Electrical characteristics
Mass
(g)
Impedance (Ω) at frequency
type number
remark
30 MHz
23
100 MHz
300 MHz
CMS2-5.6/3/4.8-4S2
CMS4-11/3/4.8-4S2
35
23
30
50
42
50
≈ 0.3
inner channel
outer channel
13
≈ 0.6
16
o
*Nominal impedance values measured at 25 C with HP4191A impedance analyzer.
Minimum values may be up to 20% lower!
November 1994
16
Magnetic Products
Philips Components
SMD Common Mode Chokes
Recommended Solder Lands
6.4
2.8
6.4
2.8
1.8
1.8
1.9
1.9
2.5
2.5
0.8
Fig.3a Solder lands for reflow soldering of CMS2-5.6/3/4.8
Fig.3b Solder lands for wave soldering of CMS2-5.6/3/4.8
6.4
6.4
2.8
1.8
2.8
1.8
1.9
1.9
2.5
2.5
0.8
Fig.4a Solder lands for reflow soldering of CMS4-11/3/4.8
Fig.4b Solder lands for wave soldering of CMS4-11/3/4.8
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November 1994
Philips Components
Magnetic Products
SMD Common Mode Chokes
Typical Impedance Curves
MWW004
200
CMS2-5.6/3/4.8-4S2
Z
(Ω)
160
2 turns
120
80
40
0
1 turn
1
10
100
1000
f (MHz)
Fig.5 Impedance as a function of frequency for CMS2-5.6/3/4.8 (1 and 2 turns).
MWW005
200
CMS4-11/3/4.8-4S2
Z
(Ω)
160
2 turns
120
80
1 turn
outer channel
40
inner channel
0
1
10
100
1000
f (MHz)
Fig.6 Impedance as a function of frequency for CMS4-11/3/4.8 (1 and 2 turns).
November 1994
18
Magnetic Products
Philips Components
SMD beads in action
19
November 1994
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