Effect of noise suppression (Chopper Converter)
Product Brief
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-causing transient
current change.
• Low loss: There is low
hysteresis loss and almost
no resistive loss through
the components.
• Diode protection: The
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.
Description
Toshiba pioneered the development of
Cobalt (Co)-based amorphous (non-
crystalline) magnetic alloys for electronic
applications and now offers amorphous
magnetic cores for noise suppression, mag-
amps, snubbers and pulse transformers.
These devices are used predominately in
switching power supplies, noise sensitive
equipment, medical instruments and
telecommunications.
The DY series were developed as the next
generation of AMOBEADS noise
suppression devices. Improvement in device
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 alloys and
magnetic components.
Toshiba “DY” Series of Amorphous Cores
1
Features
• Effective noise suppression: Minimize
directly the rapid change of current or
voltage.
• Low loss and temperature rise: Cobalt
based amorphous 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)
www.Toshiba.com/taec
–80 –40 0 40 80
0.8
0.4
0
.2
0
–0.2
–0.4
–0.8
B-H Curv (typ)
B
[
T
]
Amorphous
H [A/m]
(100 kHz, RT)
Output Noise
Diode Current
1A/div
Toshiba “DY” Series of Amorphous Cores
•The information contained herein is subject to change without notice.
• 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 patents
or other rights 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 Semiconductor
Reliability Handbook” etc.
• The Toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring
equipment, industrial robotics, domestic appliances, etc.). These Toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high
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 energy
control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of
safety devices, 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 to 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 hereby
prohibited.
AMOBEADS is a registered trademark of Toshiba Corporation in the United States and certain other jurisdictions.
All trademarks are of their respective manufacturer and may be registered in certain jurisdictions. © Copyright 5/2011 TAEC
Product Brief
www.Toshiba.com/taec
Regional Sales
Offices
Advanced Materials Division
290 Donald Lynch Blvd.
Marlborough, MA 01752
amd@taec.toshiba.com
Tel: 508-303-5041
Fax: 508-481-8890
Dexter Magnetic
Technologies
Tel: 800-775-3829
Fax: 877-221-5052
info@dextermag.com
ACAL BFI Germany GmbH
Tel: +49 (0) 60 74 / 40 98- 0,
Fax: +49 (0) 60 74 /40 98 - 10
ipe.de@bfioptilas.com
Amobeads DY Series
Frequency Characteristics
of Inductance
Coreloss Characteristic
AMOBEAD
Finished Total Insulating Packing
Dimensions [mm]
F
lux*3 Cover Unit
Type No. O.D I.D Height Φc[µWb]min *4 pcs/bag
A
B 2.8x4.5DY 4.0±0.2 5.7±0.3 0.9 Case Black
AB 3x2x3DY 4.0±0.2 *1 4.2±0.3 0.9 Case Black
AB 3x2x4.5DY 4.0±0.2 5.7±0.3 1.3 Case Gray 10,000
AB 4x2x4.5DY 5.0±0.2 5.7±0.3 2.7 Case Black
AB 4x2x6DY 5.0±0.2 7.2±0.3 3.6 Case Black
AB 5x4x3DY *5) 5.95±0.2 *2 4.2±0.3 0.45 Case Black
* I.D can pass through a *1, *2 lead.
*1. 1.2x0.7 mm
*2. 2.5x0.7 mm
*3. Converted from Inductance Value L1 at 1 kHz, 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 (Include temperature rising by self-heating)
O
.D. Height
I.D.
AC-BH Curve (Typical)
B: 500mT / div
H: 100A/m / div
50 kHz,
80A/M,
RT
AB4x2x8W
AB4x2x6W
AB4x2x4.5W
AB3x2x6W
AB3x2x4.5W
AB28x4.5W
AB3x2x3W
Typical Value
R.T.
100
10
1
0.1
AL Value (µH)
1k 10k 100k 1M
Frequency f (Hz)
10000
1000
100
10
1
0.01 0.1 1
Pfe (kW/m
3
)
ΔB: (T)
500 kHz
300kHz
200 kHz
100 kHz
50 kHz
Typical Value
R.T.
Sine Wave