4 Line Ferrite Common
Mode Power Chokes
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.
Protected by one or more of the following US Patents: 5,455,552 and 5,568,111
Features:
·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 40oC 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 23.5oC + 2o ·Bandwidth 3 kHz ·Sweep Time 423 ms ·Impedance is rated at + 25%@100MHz
PART NUMBERING SYSTEM
CM
PRODUCT
SERIES CODE
4545
X
800
B
PART
SIZE CODE
RATED
CURRENT CODE
IMPEDANCE
VALUE CODE
-
PACKAGING
CODE
00
ADDITIONAL
DESCRIPTION
Ambient Operating Temperature Range: -55° C to +125° C
IMPEDANCE (Z)
TYPICAL OHMS @
100MHz 500MHz 1GHz
DCR
MAX
OHMS
RATED I MAX
( continuous )
mA
2.54 + 0.10
(0.100 + 0.004)
130
270
230
0.003
10,000
7.62 + 0.10
(0.300 + 0.004)
2.54 + 0.25
(0.100 + 0.010)
130
270
230
0.003
10,000
9.32 + 0.25
(0.367 + 0.010)
7.62 + 0.10
(0.300 + 0.004)
2.54 + 0.10
(0.100 + 0.004)
80
270
210
0.003
10,000
9.32 + 0.25
(0.367 + 0.010)
7.62 + 0.10
(0.300 + 0.004)
2.54 + 0.25
(0.100 + 0.010)
80
270
210
0.003
10,000
Fig
#
A
mm
(inches)
B
mm
(inches)
C
mm
(inches)
D
mm
(inches)
E
mm
(inches)
CM4545Z131B-00
1
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
9.32 + 0.25
(0.367 + 0.010)
7.62 + 0.10
(0.300 + 0.004)
CM4545Z131R-00
2
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
9.32 + 0.25
(0.367 + 0.010)
*
CM4545X800B-00
1
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
*
CM4545X800R-00
2
11.38 + 0.25
(0.448 + 0.010)
11.38 + 0.25
(0.448 + 0.010)
PART
NUMBER
High Frequency Material
CM4545Z131B&R-00 (2 Turn)
Z, R, XL vs. Frequency
Impedance, Resistance, Inductive Reactance
500
Impedance (W)
400
300
200
100
XL
0
1
20
CM4545Z131B&R-00 (2 Turn)
Z vs. Frequency
Open, Common and Normal Mode
600
500
Impedance (W)
*
10
100
1000
400
300
Normal
200
Z
100
R
0
Open
Common
10000
1
10
100
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
1000
10000
CM4545Z131B&R-00 (1 Turn)
Z vs. Frequency
Open, Common and Normal Mode
700
600
600
500
500
Impedance (W)
700
400
300
Z
200
R
100
0
400
300
Open
200
Common
Normal
100
XL
0
1
10
1000
100
1
10000
10
1200
1200
1000
1000
Impedance (W)
Impedance (W)
CM4545X800B&R-00 (2 Turn)
Z, R, XL vs. Frequency
Impedance, Resistance, Inductive Reactance
800
600
Z
400
200
XL
0
10
100
10000
CM4545X800B&R-00 (2Turn)
Z vs. Frequency
Open, Common and Normal Mode
800
600
400
Normal
Open
Common
0
1000
10000
1
10
Frequency (MHz)
CM4545X800B&R-00 (1 Turn)
Z, R, XL vs. Frequency
Impedance, Resistance, Inductive Reactance
400
1000
200
R
1
100
Frequency (MHz)
Frequency (MHz)
100
Frequency (MHz)
1000
10000
CM4545X800B&R-00 (1Turn)
Z vs. Frequency
Open, Common and Normal Mode
400
300
200
Impedance (W)
300
Impedance (W)
COMMON MODE
Impedance (W)
CM4545Z131B&R-00 (1 Turn)
Z, R, XL vs. Frequency
Impedance, Resistance, Inductive Reactance
Z
100
XL
200
Open
Normal
100
Common
R
0
0
1
10
100
1000
10000
1
10
100
1000
10000
Frequency (MHz)
Frequency (MHz)
Recommended Soldering Conditions
Land patterns for Reflow soldering
One Turn / Two Turn
Equivalent Circuits
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
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