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SDH3812 Series
Low Profile, High Power, Shielded Inductors
Description
RoHS
2002/95/EC
• 125°C maximum total temperature operation
• 3.8mm x 3.8mm x 1.2mm shielded drum core
• High power density, compact footprint
• Inductance range from 0.47uH to 220uH
• Current range from 4.2 Amps to 0.16 Amps
• Ferrite shielded, low EMI
• Ferrite core material
Applications
• Buck or Boost inductor
• Noise filtering output filter chokes
• LED photo flash
• Handheld devices
• Notebook and battery power
• Cellular phones / PDA’s / GPS systems
• Digital cameras / MP3 players / IP phones
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
SDH3812-R47-R
SDH3812-1R0-R
SDH3812-1R2-R
SDH3812-1R5-R
SDH3812-2R2-R
SDH3812-3R3-R
SDH3812-4R7-R
SDH3812-6R8-R
SDH3812-8R2-R
SDH3812-100-R
SDH3812-150-R
SDH3812-220-R
SDH3812-330-R
SDH3812-470-R
SDH3812-680-R
SDH3812-820-R
SDH3812-101-R
SDH3812-151-R
SDH3812-221-R
Rated
Inductance
(µH)
0.47
1.0
1.2
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 ± 20%
0.43
0.89
1.17
1.49
2.23
3.17
4.96
6.70
8.01
9.67
14.45
22.00
32.90
46.20
67.40
81.80
97.50
149.00
218.50
Part
Marking
Designator
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
(1) Open Circuit Inductance Test Parameters: 100kHz, 0.1V, 0.0Adc.
(2) Irms: DC current for an approximate ∆T 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 30% maximum rolloff (@25°C)
Packaging
• Supplied in tape and reel packaging, 4150 per reel
Irms (2)
Amperes
Isat (3)
Amperes
2.69
2.07
1.77
1.67
1.37
1.14
0.94
0.85
0.73
0.69
0.56
0.50
0.41
0.34
0.31
0.26
0.25
0.20
0.16
4.20
3.00
2.60
2.30
1.90
1.60
1.25
1.05
0.96
0.88
0.72
0.61
0.49
0.41
0.34
0.31
0.28
0.22
0.19
DCR
Ω @20°C
(Typical)
0.027
0.045
0.062
0.069
0.104
0.148
0.220
0.265
0.342
0.398
0.612
0.750
1.132
1.583
2.000
2.750
3.042
4.542
7.017
DCR
Ω @20°C
(Maximum)
0.032
0.054
0.074
0.083
0.124
0.177
0.264
0.317
0.410
0.478
0.735
0.900
1.358
1.900
2.400
3.300
3.650
5.450
8.420
K-factor
(4)
145.2
100.6
87.1
76.9
62.2
52.3
42.2
35.3
33.5
30.4
23.8
20.1
16.1
13.8
11.4
10.3
9.4
7.6
6.3
(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).
(5) Part Number Definition: SDH3812-xxx-R
SDH3812 = Product code and size; -xxx = Inductance value in uH;
R = decimal point; If no R is present, third character = # of zeros.
-R suffix = RoHS compliant
SDH3812 Series
Low Profile, High Power, Shielded Inductors
Mechanical Diagrams
Dimensions are in millimeters.
Part Marking:
3 Digit Marking: (1st digit: Indicates inductance value per Part Marking Designator in chart above); (2nd digit: Bi-weekly production date code); (3rd digit: Last digit of the year produced).
1.5 Dia
Packaging Information
1.5 Dia.
4.00
2.00
A
1.75
1
A0 = 4.9 mm
B0 = 4.9 mm
K0 = 1.6 mm
Bo
10.25
XX X
12.0
+/-0.3
5.50
Ko
2
4.2
A0
8
4.2
SECTION A-A
A
Direction of feed
Parts packaged on 13" Diameter reel,
4,150 parts per reel.
Core Loss
1
500kHz
1MHz
0.1
200kHz
0.01
Core Loss (W)
300kHz
100kHz
0.001
0.0001
0.00001
0.000001
1
10
100
Bp-p (m T)
1000
SDH3812 Series
Low Profile, High Power, Shielded Inductors
Temperature Rise vs. Loss
100
Temperature Rise (°C)
80
60
40
20
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Total Loss (W)
Inductance Characteristics
OCL Vs. Isat
120.00%
100.00%
OCL %
80.00%
60.00%
40.00%
20.00%
0.00%
0.00%
+25 Deg. C
+85 Deg. C
- 40 Deg. C
20.00%
40.00%
60.00%
80.00%
100.00%
120.00%
140.00%
160.00%
Isat %
PM-4143 3/07
© Cooper Electronic
Technologies 2007
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selected, it should be tested by the user in all possible applications.
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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.