3．
Noise Suppression Devices SPIKE KILLER
Standard Specifications
SPIKEK KILLER
Type No.
Finished
Dimensions [mm]
O.D.
I.D.
H.T
*1
RoHS
compliant products
Core Size [mm]
O.D.
I.D.
＊2
H.T
Mean Flux
Effective core
cross section Path Length
Ae[mm
2
]
Lm [mm]
＊2
＊2
Total Flux
＊3
φc[μWb]min
Coercive
Force
＊3
Hc[A/m]
Rectangular
Ratio
＊3
Br/Bm[%]
Insulating
Cover
SS7X4X3W
9.1
SS10X7X4.5W 11.5
SS14X8X4.5W 15.8
3.3
5.8
6.8
4.8 7.5
6.6 10.0
6.6 14.0
4.5
7.0
8.0
3.0
4.5
4.5
3.38
5.06
10.1
18.8
26.7
34.6
3.15
4.73
9.46
22max
90min
PET case
Black
*1 Tolerance ±0.2［mm½ *2 Reference value
*3 Measuring condition：100kHz、80A/m (sine wave), R.T.
☆ "SPIKE KILLER " : Registered trademarks of TOSHIBA MATERIALS Co., Ltd.
☆ "SPIKE KILLER " : Resistered in U.S.A., France, Germany, U.K., Japan.
Wired SPIKE KILLER and AMOBEADS
Type No.
Core No.
Current*
1
Wire Dia.
[A] [φmm]
0.5
0.5
0.5
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
1.5
1.5
5
5
10
0.3
0.3
0.3
0.4
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.9
0.9
0.9x2
N
[turn]
5
7
9
2
3
2
3
4
7
10
15
5
7
10
10
8
5
Flux*
2
[uWb]
13.5
18.9
28.3
2.6
3.9
5.4
8.1
10.8
22.1
31.5
47.3
23.7
33.1
47.3
47.3
75.7
47.3
Dimensions[mm]
A max B max
7
7
12
6
6
7
7
7
12
12
12
14
14
14
15
20
20
9
9
8
9
9
9
9
9
8
8
10
10
10
11
11
11
8
AB44DY0305 AB4x2x4.5DY
AB44DY0307
SS07S0309
AB4x2x4.5DY
SS7x4x3W
AB34DY0402 AB3x2x4.5DY
AB34DY0403 AB3x2x4.5DY
AB44DY0402 AB4x2x4.5DY
AB44DY0403 AB4x2x4.5DY
AB44DY0404 AB4x2x4.5DY
SS07S0507
SS07S0510
SS07S0515
SS10S05105
SS10S05107
SS10S05110
SS10S09110
SS14S09108
SS14S09205
SS7x4x3W
SS7x4x3W
SS7x4x3W
SS10x7x4.5W
SS10x7x4.5W
SS10x7x4.5W
SS10x7x4.5W
SS14x8x4.5W
SS14x8x4.5W
B
3max
15±5
A
soldered
Type of wire：1UEW
*1
Typical Value, using a cross section of winding wire
：
*2
Total Flux of core ×
turn
：
Example of applied circuit and it’ characterisitic
s
[dB/div]
Without Countermeasure
Noise Radiation
Ｃ Snubber
Ｒ
FM radio band
Chopper Converter
Testing Condition of Radiant Noise Measurment
Input
Output
Frequency
Rectifier
Detector
20[V½
12[V]／2[A]
90kHz
FRD
Simple Loop Antenna
12
AMOBEADS
24
36
48
60
72
84
96
108 120
Frequency［MHz½
- 12 -
Examples of Applied Circuits and Effects of Noise Suppression
Example Circuit
：Self-Exiting Single Flyback(RCC)
100%
Eficiency［％½
Wired AMOBEADS
L
+
R
C
90%
80%
70%
60%
50%
Diode Clamp
Q
1
Cg Rg
SR
CR Snubber
SR：Wired AMOBEADS
JPN.P.
USP
No. 3190775 Toshiba Materials Co. Ltd.
No. 5745353
〃
40%
0
0.5
1
1.5
2
2.5
Output Currrent［Ａ½
3
Power Supply Efficiency（V
in
:DC140V, V
o
:24V)
Example of Effects（Delaytor）
Diode Clamp
（68½Ω、0.022μF）
Swirching
Waveform
Vds
100V/div
Id
1A/div
CR Snubber
(10Ω、1500½F）
Wired AMOBEADS
AB44DY0307 applied
Turn-on
Waveform
Vds
100V/div
Id
0.5A/div
Output Voltage
Noise
Vn
20mV/div
Wired AMOBEADS delay the turn-on time of the MOSFET when they are inserted between the gate of the
MOSFET and drive winding on the primary side of the self-exiting single flyback (RCC). The wired
AMOBEADS reduce both noise, due to surge current and switching loss, by turning on the switching
element at the point when the voltage of the transformer becomes low, utilizing the the LC resonance
phenomenon induced by inductance L of the primary winding of the transformer and a snubber capacitor C.
Note : The diode clamp circuit has a tendency to increase the out put noise.
- 13 -
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