®
Uni-Pac™ 2.8B SMT Power Inductors
Low-Profile / 2.8mm
Description
Uni-Pac™ surface mount inductors can be used in DC/DC
converters and as signal conditioning or filter inductors.
Because of their miniature size and rugged construction,
Uni-Pacs are ideally suited for products requiring higher
power per millimeter of PCB space. Such applications
include notebook computers, pagers and a variety of battery
powered equipment.
Features
•
•
•
•
•
Low DCR / High Efficiency
Suited for IR and Vapor Reflow Solder
Frequency Range 1kHz to 2MHz
Designed for High Shock Environments
Ideal for Energy Storage Applications
ELECTRICAL SPECIFICATIONS
Part
Number
UP2.8B-1R0
UP2.8B-2R2
UP2.8B-4R7
UP2.8B-100
UP2.8B-150
UP2.8B-220
UP2.8B-330
UP2.8B-470
Inductance
µH
1.0
2.2
4.7
10
15
22
33
47
OCL (1)
µH ± 20%
0.98
2.44
4.15
10
15
22
33
47
Irms (2)
Amperes
(Typ.)
3.6
3.1
2.7
2.1
1.7
1.5
1.3
1.0
Isat (3)
Amperes
(Typ.)
8.0
5.2
3.9
2.7
2.2
1.7
1.5
1.2
DCR (4)
Ohms
(Max.)
.0286
.0356
.0478
.080
.120
.190
.250
.340
Q
(Typ.)
30
30
30
30
30
30
30
30
SRF
(Typ.)
65
60
52
40
24
18
14
11
1) Open Circuit Inductance Test Parameters: 100kHz, 0.250 Vrms, 0.0 Adc
2) RMS current, delta temp. of 40° C ambient temperature of 85° C
3) Peak current for approximately 10% roll-off
4) Values @ 20° C
2.92
2.63
max
Parts come on tape-and-reel at 1,750 units per reel
INDUCTANCE VS SATURATION CURRENT
120
% of Initial Inductance
UP2.8B
9.4
max
9.4
max
7.37
100
80
60
40
20
0
0
40
80
% of Isat
12.9
max
Component view
Dimensions in Millimeters
2.8
max
2.79
Recommended
PCB Layout
120
160
Specifications are subject to change without notice.
PM-4106 9/00
© Cooper Electronic
Technologies 2000
Visit us on the Web at www.cooperET.com
3601 Quantum Boulevard Boynton Beach, Florida 33426-8638
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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.