SD3112 Series
Low Profile Power Inductors
Description
RoHS
2002/95/EC
• 125°C maximum total temperature operation
• 3.1mm x 3.1mm x 1.2mm shielded drum core
• Ferrite core material
• Inductance range from 1.0uH to 220uH
• Current range from 1.65 Amps to 0.113 Amps
• Frequency range up to 4MHz
Applications
• Cellular phones, Digital cameras, CD players, PDA’s
• Small LCD displays
• LED driver and LED flash circuits
• Hard disk drives
• Backlighting
• EL panel
Environmental Data
• Storage temperature range: -40°C to +125°C
• Operating temperature range: -40°C to +125°C
(range is application specific)
• Solder reflow temperature: +260°C max. for 10 seconds
maximum
Part Number
Rated
Inductance
(µH)
1.0
1.5
2.2
3.3
4.7
6.8
8.2
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100.0
150.0
220.0
OCL (1)
(µH)
1.11+/-30%
1.70+/-30%
2.41+/-30%
3.24+/-30%
4.72+/-30%
6.47+/-30%
8.50+/-30%
10.01+/-30%
15.28+/-20%
21.66+/-20%
33.30+/-20%
47.44+/-20%
68.10+/-20%
83.19+/-20%
99.8+/-20%
149.4+/-20%
219.9+/-20%
Part
Marking
Designator
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
Packaging
• Supplied in tape and reel packaging, 4100 per reel
Irms (2)
Amperes
1.39
1.16
0.97
0.90
0.74
0.68
0.57
0.55
0.45
0.37
0.30
0.270
0.228
0.213
0.184
0.149
0.121
Isat (3)
Amperes
1.65
1.33
1.12
0.97
0.80
0.68
0.60
0.55
0.44
0.37
0.30
0.25
0.211
0.190
0.174
0.142
0.117
SD3112-1R0-R
SD3112-1R5-R
SD3112-2R2-R
SD3112-3R3-R
SD3112-4R7-R
SD3112-6R8-R
SD3112-8R2-R
SD3112-100-R
SD3112-150-R
SD3112-220-R
SD3112-330-R
SD3112-470-R
SD3112-680-R
SD3112-820-R
SD3112-101-R
SD3112-151-R
SD3112-221-R
DCR (Ω)
typ. @
20°C
0.069
0.099
0.140
0.165
0.246
0.291
0.408
0.446
0.654
0.953
1.48
1.85
2.56
2.93
3.95
6.01
9.12
K-factor
(4)
135
110
92
79
66
56
49
45
37
31
25
21
17
16
14
12
10
(1) Open Circuit Inductance Test Parameters: 100kHz, 0.1V, 0.0Adc.
(2) Irms: DC current for an approximate DT of 40°C without core loss. Derating is
necessary for AC currents. PCB layout, trace thickness and width, air-flow, and
proximity of other heat generating components will affect the temperature rise. It
is recommended that the temperature of the part not exceed 125°C under worst
case operating conditions verified in the end application.
(3) Isat Amperes peak for approximately 30% rolloff (@20°C)
(4) K-factor: Used to determine B p-p for core loss (see graph).
B p-p = K*L*∆I, B p-p(mT), K: (K factor from table), L: (Inductance in uH),
∆I
(Peak to peak ripple current in Amps).
SD3112 Series
Low Profile Power Inductors
Mechanical Diagrams
Dimensions are in millimeters.
Part Marking:
3 Digit Marking: (1st digit: Indicates inductance value per letter in Part Marking Designator); (2nd digit: Bi-weekly production date code); (3rd digit: Last digit of the year produced).
Packaging Information
Parts packaged on 13" Diameter reel,
4,100 parts per reel.
DC Current vs. Temperature
90
80
70
60
50
40
30
20
10
0
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
Total Loss (W)
Temp. Rise(°C)
SD3112 Series
Low Profile Power Inductors
Core Loss
10
1MHz
500kHz
0.1
Core Loss (W)
1
300kHz
200kHz
100kHz
50kHz
0.01
0.001
0.0001
0.00001
0.000001
1
10
Bp-p (mT)
100
1000
Inductance Characteristics
120%
110%
100%
90%
80%
OCL vs Isat
% o f O C L
% of OCL
70%
60%
50%
40%
30%
20%
10%
0%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
110%
120%
130%
140%
-40°C
25°C
85°C
%
% of
I
Isat
o f s a t
PM-4127 3/07
© Cooper Electronic
Technologies 2006
Visit us on the Web at www.cooperbussmann.com
1225 Broken Sound Pkwy. Suite F Boca Raton, FL 33487
Tel: +1-561-998-4100 Toll Free: +1-888-414-2645 Fax: +1-561-241-6640
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.
Life Support Policy: Cooper Electronic Technologies does not authorize the use of any of its products for use in life support devices or systems without the
express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when
properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
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