Product
B
ri
e
f
Toshiba “DY” Series
of
Amorphous
Cores
Highlights
• Low noise: When placed
in series with a diode, the
“DY” series of amorphous
cores effectively suppress
noise-caus ing transient
current change.
• Low loss: There is low
hysteresis loss and almost
no resistive loss through
the components.
• Diode protec t ion: The
Description
Toshiba pioneered the development of
Cobalt (Co)-based amorphous (non-
crystalline) magnetic alloys for electronic
applicat ions and now o ffers amorphous
magnetic cores for noise suppression, mag-
amps, snubbers and pulse transformers.
These devices are used predominately in
sw itc h in g power supplies, noise sensitive
equipment, medical instruments and
telecommunications.
The DY series were develo ped as the n ext
generation of AMOB EAD S noise
suppression devices. Improvement in device
Features
• Effective noise suppression: Minimize
directl y th e rapid change of current or
voltage.
• Low loss and temperature rise: Cobalt
based am orphous material has low loss at
high frequency.
• Low influence against circuit parts: High
rectangular ratio means low influences such
as surge voltage.
Magnetic Characteristics (B-H curve)
products suppress current
and voltage spikes within
the circuit, which protects
the diode.
• Space savings: The
Toshiba AMOBEADS®
noise suppression devices
can be mounted directly
onto the leads of diodes
and do not require
additional circuit board
space. They are also
available in a surface
mount configuration.
design captured the same magnetic
properties as the current familiar
AMOBEADS family, but with pricing
competitive to ferrite beads. As a result of
this new design, applications have
expanded into consumer electronics
because of the excellent advantages in cost
and noise suppression. Toshiba continues
its R&D programs to further improve the
properties of the amorphous alloy s and
magnetic components.
Effect of noise suppression (Chopper Converter)
0.8
0.4
0.2
0
–0.2
–0.4
–0.8
B
[
T
]
–80 –40 0 40 80
B-H Curv
(typ)
Amorphous
H
[A/m]
(100 kHz, RT)
Output Noise
Diode Current
1A/div
www.Toshiba.com/taec
1
Toshiba “DY” Series
of
Amorphous
Cores
Type
N
o
.
F
i
n
i
s
h
e
d
Dimensions [
mm
]
Tot
a
l
F
l
u
x
*
3
Φ
c
[
µ
W
b
]
m
i
n
I
n
s
u
l
a
t
i
ng
C
o
v
e
r
*
4
P
a
ck
i
ng
U
n
i
t
p
cs
/
b
a
g
O
.
D
I.D
H
e
i
ght
AB
2.8x4.5
DY
4.0±0.2
*
1
5.7±0.3
0.9
Case
B
l
a
ck
10,000
AB
3x2x3
DY
4.0±0.2 4.2±0.3
0.9
Case
B
l
a
ck
AB
3x2x4.5
DY
4.0±0.2 5.7±0.3
1.3
Case
G
r
a
y
AB
4x2x4.5
DY
5.0±0.2 5.7±0.3
2.7
Case
B
l
a
ck
AB
4x2x6
DY
5.0±0.2 7.2±0.3
3.6
Case
B
l
a
ck
AB 5x4x3DY
*
5
) 5.95±0.2
*
2
4.2±0.3
0.45
Case
B
l
a
ck
AL Value (µH)
Product
B
ri
e
f
Amobeads DY Series
Regional Sales
Office
Acal BFi Nederland bv
Luchthavenweg 53
5657 EA Eindhoven
Tel 04-2507 400
sales-nl@acalbfi.nl
* I.D can pass through a *1, *2 lead.
*1. 1.2x0.7 mm
*2. 2.5x0.7 mm
*3. Converted fr om In ductanc e Value L1 at 1 k Hz, 100 mA (sine wave), R.T. Φc[µWb]=0.282xL1[µH]
*4. UL94V-0 approved material
*5. Mass production being planned. (Samples available).
Maximum Operating temperature: 120 ºC (Incl ude temperature rising by sel f-heating)
O.D.
I.D.
Height
50
kHz,
80A/M,
RT
B: 500mT /
div
H:
100A/m
/
div
AC-BH Curve
(T
ypical)
100
10
Frequency Characteristics
of Inductance
AB4x2x8W
AB4x2x6W
AB4x2x4.5W
Coreloss Characteristic
AMOBEAD
10000
Typical Value
R.T.
Sine Wave
1000
1
0.1
AB3x2x6W
AB3x2x4.5W
AB28x4.5W
AB3x2x3W
Typical
Va
l
u
e
R.T.
100
10
500
kHz
300kHz
200
kHz
100
kHz
1
k
10k 100k
1M
Frequency f
(Hz)
50 kHz
1
•
T
he information contained herein is subject to change without noti
c
e.
0.01 0.1
1
ΔB:
(T)
www.Toshiba.com/taec
•
The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of
p
atents
or other right s of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of
TOSHIBA
or others.
•
TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their
inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in
making a safe design for the entire system, and to avoid situation in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or
damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA
products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA
S
emi
c
on
d
u
c
tor
Reliability Handbook” et
c
.
•
The Toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measurin
g
equipment, industrial robotics, domestic appliances, etc.). These Toshiba products are neither int ended nor warranted for usage in equipment that requires extraordinarily hi
g
h
quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic ener
g
y
control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of
safety dev ic es, etc. Unintended usage of Toshiba products listed in this document shall be made at the customer’s own risk.
•
The products described in this document may include products subject to foreign exchange and foreign trade laws.
•
The products contained herein may also be controlled under the U.S. Export Administration Regulations and/or subject t o the approval of the U.S . Department of Commerce or
U.S. Department of State prior to export. Any export or re-export, directly or indirectly in contravention of any of the applicable export laws and regulations, is here
b
y
p
rohi
b
ite
d
.
AMOBEADS
is a registered trademark of Toshiba Corporation in the United States and certain other juris
d
i
c
tions.
Toshiba “DY” Series
of
Amorphous
Cores
All trademarks are o f their respective manufacturer and may be registered in certain jurisdictions. © Copyright 5/2011 TAEC