Document 580NR-1
Coupled Inductors
LPD4012
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• Only 1.1 mm high and 4 mm square
• Ideal for use in flyback, multi-output buck, SEPIC and Zeta
applications.
• High inductance, high efficiency and excellent current
handling
• Can also be used as two single inductors connected in
series or parallel or as a common mode choke.
+
D
+
L1
V
IN
C
SW
L2
C
V
OUT
–
–
Typical Flyback Converter
+
C
V
OUT
AUX
L2
+
Dot indicates pin 1
4
D
–
0.155 ±0.003
3,94 ±0,076
1
+
SW
D
V
IN
L1
C
V
OUT
–
0.155 ±0.003
3,94 ±0,076
–
Typical Buck Converter with auxiliary output
+
L1
C1
Q
V
IN
2
XXX X
Dash
number
3
D
+
C
V
OUT
Internal
code
C
L2
0.0433 ±0.004
1,10 ±0,10
–
Recommended
Land Pattern
1
4
Typical SEPIC schematic
–
0.103 0.049
2,606 1,24
2
0.031
0,78
45°
typ
0.174
4,40
+
Q
V
IN
+
C1
L2
D
C
V
OUT
C
L1
–
3
Typical Zeta schematic
–
0.060
1,52
1
L1
2
L2
4
0.049
1,24
0.103
2,606
0.174
4,40
Dimensions are in
inches
mm
3
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 580NR-1
Revised 01/13/12
© Coilcraft Inc. 2014
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 580NR-2
Coupled Inductors for SEPIC Applications – LPD4012 Series
Part number
1
LPD4012-331NL_
LPD4012-561NL_
LPD4012-821NL_
LPD4012-152NL_
LPD4012-222NL_
LPD4012-332NL_
LPD4012-472ML_
LPD4012-562ML_
LPD4012-682ML_
LPD4012-822ML_
LPD4012-103ML_
LPD4012-153ML_
LPD4012-223ML_
LPD4012-333ML_
LPD4012-473ML_
LPD4012-683ML_
LPD4012-823ML_
LPD4012-104ML_
LPD4012-124ML_
LPD4012-154ML_
LPD4012-184ML_
LPD4012-224ML_
LPD4012-334ML_
Inductance DCR max SRF typ
(µH)
(Ohms)
(MHz)
2
3
4
Coupling Leakage
coefficient
L typ
5
typ
(µH)
0.94
0.95
0.97
0.97
0.98
0.98
0.98
0.99
0.99
0.99
0.99
0.99
0.99
>0.99
>0.99
>0.99
>0.99
>0.99
>0.99
>0.99
>0.99
>0.99
>0.99
0.06
0.08
0.09
0.11
0.14
0.16
0.18
0.20
0.22
0.24
0.26
0.30
0.34
0.41
0.51
0.66
0.75
0.86
0.98
1.19
1.40
1.66
2.45
10%
drop
5.2
3.7
3.2
2.50
2.30
1.80
1.60
1.50
1.20
1.10
0.98
0.90
0.70
0.37
0.33
0.27
0.27
0.22
0.21
0.18
0.16
0.15
0.13
Isat
(A)
6
20%
30%
drop
drop
5.4
3.8
3.3
2.81
2.40
1.90
1.70
1.60
1.52
1.20
1.00
0.92
0.82
0.57
0.39
0.36
0.27
0.28
0.26
0.26
0.21
0.16
0.16
5.6
3.9
3.4
2.91
2.50
2.00
1.80
1.60
1.63
1.30
1.10
0.94
0.84
0.58
0.40
0.37
0.29
0.29
0.27
0.27
0.23
0.17
0.16
Irms
(A)
both
one
windings
7
winding
8
1.87
1.30
1.21
1.15
0.95
0.75
0.65
0.55
0.60
0.55
0.50
0.43
0.34
0.31
0.28
0.25
0.23
0.20
0.19
0.17
0.14
0.12
0.10
2.65
1.84
1.72
1.62
1.35
1.06
0.92
0.78
0.86
0.78
0.71
0.60
0.48
0.44
0.39
0.36
0.31
0.27
0.27
0.23
0.18
0.17
0.14
0.33 ±30%
0.56 ±30%
0.82 ±30%
1.5 ±30%
2.2 ±30%
3.3 ±30%
4.7 ±20%
5.6 ±20%
6.8 ±20%
8.2 ±20%
10 ±20%
15 ±20%
22 ±20%
33 ±20%
47 ±20%
68 ±20%
82 ±20%
100 ±20%
120 ±20%
150 ±20%
180 ±20%
220 ±20%
330 ±20%
0.042
0.087
0.100
0.185
0.235
0.320
0.500
0.620
0.530
0.600
0.750
1.13
1.63
1.83
2.52
3.23
3.66
4.76
5.54
6.90
8.75
11.24
17.00
255
185
130
86
70
48
39
32
31
29
25
21
15
12
8.8
7.8
7.3
6.1
5.3
4.6
4.1
3.3
2.8
1. Please specify
termination
and
packaging
codes:
LPD4012-334MLC
Termination: L
= RoHS compliant Silver-palladium-platinum-glass frit.
Special order:
T
= RoHS tin-silver-copper (95.5/4/0.5) or
S
= non-RoHS tin-lead (63/37).
Packaging: C
= 7″ machine-ready reel. EIA-481 embossed plastic
tape (1000 parts per full reel).
B
= Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
D
= 13″ machine-ready reel. EIA-481 embossed plastic
tape. Factory order only, not stocked (3500 parts per
full reel).
2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms,
0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads
are connected in parallel, inductance is the same value. When leads
are connected in series, inductance is four times the value.
3. DCR is for each winding. When leads are connected in parallel, DCR
is half the value. When leads are connected in series, DCR is twice the
value.
4. SRF measured using an Agilent/HP 4191A or equivalent. When leads
are connected in parallel, SRF is the same value.
5. Leakage Inductance is for L1 and is measured with L2 shorted.
6. DC current, at which the inductance drops the specified amount from
its value without current. It is the sum of the current flowing in both
windings.
7. Equal current when applied to each winding simultaneously that
causes a 40°C temperature rise from 25°C ambient. See temperature
rise calculation.
8. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. See temperature rise calculation.
9. Electrical specifications at 25°C.
Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.”
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Coupled Inductor Core and Winding Loss Calculator
This web-based utility allows you to enter frequency, peak-to-peak
(ripple) current, and
Irms
current to predict temperature rise and
overall losses, including core loss.
Go to online calculator.
Core material
Ferrite
Core and winding loss
Go to online calculator
Weight
54 – 64 mg
Terminations
RoHS compliant silver-palladium-platinum-glass frit.
Other terminations available at additional cost.
Ambient temperature
–40°C to +85°C with
Irms
current, +85°C to
+125°C with derated current
Storage temperature
Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Winding to winding isolation
100 V
Resistance to soldering heat
Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging
1000/7″ reel; 3500/13″ reel Plastic tape: 12 mm wide,
0.25 mm thick, 8 mm pocket spacing, 1.32 mm pocket depth
Recommended pick and place nozzle
OD: 4 mm; ID:
≤
2 mm
PCB washing
Tested with pure water or alcohol only. For other
solvents, see
Doc787_PCB_Washing.pdf.
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 580NR-2 Revised 01/13/12
Document 580-2 Revised 02/15/11
© Coilcraft Inc. 2014
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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