COMMON MODE
Steward’s
multi-line ferrite common mode power / data filter products provide the most
economical EMI filtering available for common mode noise. They provide EMI suppres
sion for groups of conductors such as power traces, and for high speed input/output
circuitry (including network and storage subsystems). They exhibit high frequency
impedance essentially independent of DC bias current.
4 Line Ferrite Common
Mode Power Chokes
Features:
Protected by one or more of the following US Patents: 5,455,552 and 5,568,111
·High
current carrying capability (10 amps continuous operation)
·Can
be used as multi-turn device to multiply impedance
·With
two turns, up to 800 ohms impedance at 300 MHz.
·Available
in both thru-hole (B) and surface mount (R) versions
·The
most
economical common mode filter available for filtering groups of signals
·Parts
available in broad band and high frequency materials
Applications:
·Filtering
DC power on PC boards, especially in applications of greater than 3.0 amperes
·Filtering
common mode EMI on high
speed differential lines such as network and SCSI subsystems
·Cost
sensitive designs
·Applications
where low DCR is needed.
Part & Test Specifications:
·Maximum
current ratings (
I
MAX ) are determined by testing to a maximum temperature rise of 40
o
C with continuous operating
current.
·Board
level components are rated up to a maximum of 75 volts
·Part
performance is shown with curves for Common, Open
and Normal Mode impedances measured along two conductors.
Common Mode
Iimpedance is the impedance of EMI noise
conducted in the same direction along two conductors.
Open Circuit
Impedance is the impedance measured across a single leg of
the common mode choke.
Normal Mode
Impedance is the total impedance to the differential circuit (both out and back).
Tested with:
·HP4396A
(100KHz - 1.8 GHz) or HP8753 (to 6 GHz) Network/Spectrum analyzer
·HP43961A
Impedance Test Kit
·HP16192A
Test Fixture or Inter-Continental Microwave custom fixtures
·HP16200A
DC Bias Adapter
·Philips
PM2811 DC Power
Supply
·Ambient
Temperature 23.5
o
C + 2
o
·Bandwidth
3 kHz
·Sweep
Time 423 ms
·Impedance
is rated at + 25%@100MHz
PART NUMBERING SYSTEM
CM
PRODUCT
SERIES CODE
4545
PART
SIZE CODE
X
RATED
CURRENT CODE
800
IMPEDANCE
VALUE CODE
B
PACKAGING
CODE
-
00
ADDITIONAL
DESCRIPTION
Ambient Operating Temperature Range: -55° C to +125° C
PART
NUMBER
Fig
#
A
mm
(inches)
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
B
mm
(inches)
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
C
mm
(inches)
9.32 + 0.25
(0.367 + 0.010)
9.32 + 0.25
(0.367 + 0.010)
9.32 + 0.25
(0.367 + 0.010)
9.32 + 0.25
(0.367 + 0.010)
D
mm
(inches)
7.62 + 0.10
(0.300 + 0.004)
7.62 + 0.10
(0.300 + 0.004)
7.62 + 0.10
(0.300 + 0.004)
7.62 + 0.10
(0.300 + 0.004)
E
mm
(inches)
2.54 + 0.10
(0.100 + 0.004)
2.54 + 0.25
(0.100 + 0.010)
2.54 + 0.10
(0.100 + 0.004)
2.54 + 0.25
(0.100 + 0.010)
IMPEDANCE (Z)
TYPICAL OHMS @
100MHz 500MHz 1GHz
130
270
230
DCR
MAX
OHMS
0.003
RATED
I
MAX
( continuous )
mA
10,000
CM4545Z131B-00
CM4545Z131R-00
1
2
130
270
230
0.003
10,000
*
*
*
CM4545X800B-00
CM4545X800R-00
1
80
270
210
0.003
10,000
2
80
270
210
0.003
10,000
High Frequency Material
CM4545Z131B&R-00 (2 Turn)
Z, R, X
L
vs. Frequency
Impedance, Resistance, Inductive Reactance
500
600
500
CM4545Z131B&R-00 (2 Turn)
Z vs. Frequency
Open, Common and Normal Mode
400
Impedance (W)
300
Impedance (W)
400
300
200
Normal
200
100
X
L
0
1
10
100
1000
Z
R
10000
100
0
1
10
100
1000
Open
Common
10000
20
Frequency (MHz)
Frequency (MHz)
STEWARD
- U.S.A.
• Telephone: 423/867-4100 • Fax 423/867-4102 • Internet: http://www.steward.com
SCOTLAND
• Telephone: 44-(0)1-506-414200 • Fax 44-(0)1-506-410694
SINGAPORE
• Telephone: (65)337-9667 • Fax (65)337-9686
CM4545Z131B&R-00 (1 Turn)
Z, R, X
L
vs. Frequency
Impedance, Resistance, Inductive Reactance
700
600
700
600
CM4545Z131B&R-00 (1 Turn)
Z vs. Frequency
Open, Common and Normal Mode
COMMON MODE
Impedance (W)
Impedance (W)
500
400
300
200
100
0
500
400
300
200
100
0
Open
Common
Normal
Z
R
X
L
1
10
100
1000
10000
1
10
100
1000
10000
Frequency (MHz)
CM4545X800B&R-00 (2 Turn)
Z, R, X
L
vs. Frequency
Impedance, Resistance, Inductive Reactance
1200
Frequency (MHz)
CM4545X800B&R-00 (2Turn)
Z vs. Frequency
Open, Common and Normal Mode
1200
1000
1000
Impedance (W)
800
600
Z
400
Impedance (W)
800
600
400
200
0
1
10
R
X
L
100
1000
10000
200
0
1
10
Normal
Open
Common
Frequency (MHz)
CM4545X800B&R-00 (1 Turn)
Z, R, X
L
vs. Frequency
Impedance, Resistance, Inductive Reactance
Frequency (MHz)
100
1000
10000
400
400
CM4545X800B&R-00 (1Turn)
Z vs. Frequency
Open, Common and Normal Mode
300
300
Impedance (W)
Impedance (W)
200
Z
200
Open
Normal
100
Common
100
R
0
1
10
100
X
L
0
1000
10000
1
10
100
1000
10000
Frequency (MHz)
Frequency (MHz)
Recommended Soldering Conditions
One Turn /
Two Turn
Equivalent Circuits
Land patterns for Reflow soldering
STEWARD
- U.S.A.
• Telephone: 423/867-4100 • Fax 423/867-4102 • Internet: http://www.steward.com
SCOTLAND
• Telephone: 44-(0)1-506-414200 • Fax 44-(0)1-506-410694
SINGAPORE
• Telephone: (65)337-9667 • Fax (65)337-9686
21
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
