®
ECONO-PAC™/OCTA-PAC™
GENERAL
ECONO-PACs and OCTA-PACs are versatile surface
mount magnetic devices that can be used in design
applications as single inductors, coupled inductors, or 1:1
transformers providing isolation between the two
windings. OCTA-PACs are designed around high
frequency, low loss material which allows maximum
power density with minimum core losses. ECONO-PACs,
lower cost versions of OCTA-PACs incorporating
powdered iron cores, deliver frequency responses to
several megaHertz.
Both products may be used in many engineering
applications depending on their connection (see
Connection Diagrams). When used as inductors, they
provide low inductance with high current if wired in
parallel, or higher inductance with lower current if wired in
series. When used as 1:1 transformers, they provide
electrical isolation and extremely wide voltage
transformation in the flyback mode.
ECONO-PACs and OCTA-PACs are designed for easy
use in any SMT sub-assembly manufacturing process.
Supplied in tape and reel packaging, their cases make
them ideal “pick-and-place” devices, and each pin #1 is
marked for clear identification. ECONO-PACs and OCTA-
PACs are suitable for normal exposure to infrared reflow
soldering procedures.
ENVIRONMENTAL SPECIFICATIONS
• Storage Temperature Range: -40°C to +125°C.
• Operating Ambient Temperature Range: -40°C to
+85°C
Range is application specific
• Infrared Reflow Temperature:
+240°C for 30 seconds maximum
PACKAGING INFORMATION
ECONO-PACs and OCTA-PACs are available in Tape
Reel packaging. The number of devices per reel is
dependent on the case size of the device.
Case Size
-1
-2
-3
-4
Quantity Per Reel
1100
800
800
600
FEATURE - BENEFITS
• Maximum Power Density
• Engineered to Provide High Efficiency
through Toridal Design
• Application Versatility
1:1 Coupled Inductors and
1:1 Isolation Transformers
• Low EMI Radiation
• Models Available for Full Load Current
Range of 0.22 to 7.90 ADC
• Available in Tape-and Reel Packaging for
Pick-and-Place Utilization.
®
ECONO-PAC™/OCTA-PAC™
PERFORMANCE CHARACTERISTICS
INDUCTANCE VS. CURRENT
100
90
80
70
60
50
40
30
20
10
0
0.00
TEMPERATURE RISE VS. RATED CURRENT
Max. Ambient plus Rise = 125°C
140
ECONO-PAC
Degrees C
120
100
80
60
40
20
Percentage of
Inductance
ECONO-PAC & OCTA-PAC
OCTA-PAC
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Per Unit Full Load Current
Per Unit Full Load Current
INDUCTANCE VS. TEMPERATURE
+8
+6
+4
+2
+0
-2
-4
-6
-8
-10
-12
-14
-35
• INDUCTANCE VS. CURRENT:
Inductance will fall off as DC Current is increased.
(See Inductance vs. Current graph).
• INDUCTANCE VS. FREQUENCY:
Inductance roll-off versus Frequency approximates 3% at
1 megaHertz.
• FREQUENCY RESPONSE:
Wide-band frequency response to 1 megaHertz.
• CURRENT LIMITATION:
The maximum allowable currents are defined by the internal
“hot-spot” temperatures which are limited to 130°C, including
ambient.
+85
+105
+125
Percentage Change
in Inductance
ECONO-PAC
OCTA-PAC
-15
+5
+25
+45
+65
Temperature in Degrees C.
Specifications are typical except where noted and
subject to change without notice.
CONNECTION DIAGRAMS
MECHANICAL DIAGRAM
RECOMMENDED LAYOUT
.005 IN.
For Cleaning
Clearance
TOP VIEW
Case Size
-1
-2
-3
-4
D
.277
.277
.348
.348
E
.422
.422
.492
.492
F
G
.392 .145
.392 .145
.492 .160
.492 .160
BOTTOM VIEW
Dimensions in inches, typical
PM-4305 2/00
© Cooper Electronic
Technologies 2000
Visit us on the Web at www.cooperET.com
6000 Park of Commerce Blvd. Boca Raton, Florida 33487
Tel: +1-561-241-7876 Toll Free: +1-888-414-2645 Fax: +1-561-241-9339
This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper
Electronic Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of
any products. Cooper Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this
bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
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