®
ECONO-PAC™/OCTA-PAC®
OCTA-PAC® PLUS
Power Inductors and Transformers
Performance Characteristics
TEMPERATURE RISE VS. RATED CURRENT
INDUCTANCE VS. CURRENT
100
90
80
70
60
50
40
30
Max. Ambient plus Rise = 125°C
140
ECONO-PAC
120
100
ECONO-PAC & OCTA-PAC
80
60
40
20
0
OCTA-PAC
20
10
0
0.00
0.25
0.50 0.75
1.00
1.25
1.50 1.75
2.00
2.25 2.50
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. CURRENT:
Inductance will fall off as DC Current is increased.
(See Inductance vs. Current graph).
INDUCTANCE VS. TEMPERATURE
+8
+6
• INDUCTANCE VS. FREQUENCY:
Inductance roll-off versus Frequency approximates 3% at
1 megaHertz.
ECONO-PAC
+4
+2
+0
-2
• FREQUENCY RESPONSE:
Wide-band frequency response to 1 megaHertz.
-4
-6
OCTA-PAC
• CURRENT LIMITATION:
-8
-10
-12
-14
The maximum allowable currents are defined by the internal
“hot-spot” temperatures which are limited to 130°C, including
ambient.
-35
-15
+5
+25
+45
+65
+85
+105 +125
Temperature in Degrees C.
OCTA-PAC® PLUS Typical Inductance vs. DC Current
OCTA-PAC® PLUS Winding Loss Derating with Core Loss
100
90
80
70
60
50
40
30
20
0
20
40
50
60
70
80
90
92
94
95
96
97
98
10
0
99
10
20
30
40
50 60
80 100
200
300
400 500 600
800 1000
0
20
40
60
80
100
120
140
160
180
200
% of Applied Volt-µ-Second Rating
% of Isat
PM-4314 7/05
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© Cooper Electronic
Technologies 2005
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