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LPD4012 Datasheet

Coupled Inductors

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LPD4012 pdf
Document 580-1
Coupled Inductors–LPD4012 Serieswww.DataSheet4U.com
For SEPIC
Applications
The LPD4012 coupled miniature shielded inductors are
only 1,1 mm high and 4 mm square. Their excellent
coupling coefficient (k 0.94) makes them ideal for use
in SEPIC applications. In SEPIC topologies, the re-
quired inductance for each winding in a coupled induc-
tor is half the value needed for two separate inductors,
allowing selection of a part with lower DCR and higher
current handling.
These inductors provide high efficiency and excellent
current handling in a rugged, low cost part.
They can be used as a coupled inductor, two single
inductors connected in parallel, as a 1 : 1 transformer or
as an autotransformer when connected in series.
0.155 ±0.003
3,94 ±0,076
14
0.155 ±0.003
3,94 ±0,076
2 XXX X 3
Dot indicates pin 1
D1
++
L1 C1
VIN Q1
+
L2 C2
Load VOUT
––
Dash Internal
number code
Typical SEPIC schematic
Refer to Application Note, Document 639,
“Selecting Coupled Inductors for SEPIC Applications”
0.060
1,52
1
L1
2
0.0433 ±0.004
1,10 ±0,10
Recommended
Land Pattern
1
0.103 0.049
2,606 1,24
0.031
0,78
4 45°
typ
0.174
4,40
23
0.049
1,24
0.103
2,606
0.174
4 4,40
L2
3
Dimensions are in
inches
mm
Core material Ferrite
Core and winding loss See www.coilcraft.com/coupledloss
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.
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 1000/7reel; 3500/13reel 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 Only pure water or alcohol recommended
Specifications subject to change without notice.
Please check our website for latest information.
Document 580-1 Revised 02/19/09
© Coilcraft, Inc. 2009



Coilcraft
Coilcraft

LPD4012 Datasheet Preview

LPD4012 Datasheet

Coupled Inductors

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LPD4012 pdf
Document 580-2
www.DataSheet4U.com
Coupled Inductors for SEPIC Applications–LPD4012 Series
Part number1
LPD4012-331NL_
LPD4012-561NL_
LPD4012-821NL_
LPD4012-152ML_
LPD4012-222ML_
LPD4012-332ML_
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_
LPD4012-474ML_
LPD4012-564ML_
Inductance2
(µH)
0.33 ±30%
0.56 ±30%
0.82 ±30%
1.5 ±20%
2.2 ±20%
3.3 ±20%
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%
470 ±20%
560 ±20%
DCR max3
(Ohms)
0.042
0.087
0.100
0.134
0.176
0.242
0.370
0.467
0.500
0.545
0.638
0.940
1.52
1.74
2.20
3.19
3.41
4.76
5.20
6.90
7.90
9.80
15.12
20.90
22.10
SRF typ4
(MHz)
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
2.3
2.1
1. Please specify termination and packaging codes:
LPD4012-564MLC
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 = 7machine-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 = 13machine-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. DC current, at which the inductance drops the specified amount from its
value without current. It is the current flowing in one winding or the sum
of the current flowing in both windings.
6. Equal current, when applied to each winding simultaneously, that
causes a 40°C temperature rise from 25°C ambient. See temperature
rise calculation.
7. Maximum current, when applied to one winding, that causes a 40°C
temperature rise from 25°C ambient. See temperature rise calculation.
8. 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.
Isat (A)5
10% drop 20% drop 30% drop
5.2 5.4 5.6
3.7 3.8 3.9
3.2 3.3 3.4
2.6 2.7 2.8
2.3 2.4 2.5
1.8 1.9 2.0
1.6 1.7 1.8
1.5 1.6 1.6
1.3 1.4 1.5
1.1 1.2 1.3
0.98 1.0 1.1
0.79 0.82 0.84
0.74 0.78 0.79
0.45 0.47 0.48
0.35 0.37 0.38
0.30 0.32 0.33
0.26 0.28 0.30
0.24 0.26 0.27
0.23 0.24 0.25
0.21 0.22 0.23
0.18
0.150
0.140
0.100
0.090
0.19
0.16
0.145
0.110
0.105
0.20
0.17
0.150
0.120
0.115
Irms (A)
both
one
windings6 winding7
1.87 2.65
1.30 1.84
1.21 1.72
1.05 1.48
0.91 1.29
0.78 1.10
0.63 0.89
0.56 0.79
0.54 0.77
0.52 0.74
0.48 0.68
0.40 0.56
0.31 0.44
0.29 0.41
0.26 0.37
0.21 0.30
0.21 0.29
0.18 0.25
0.17 0.24
0.15 0.21
0.14 0.19
0.12 0.17
0.10 0.14
0.08 0.12
0.08 0.12
Temperature rise calculation based on specified Irms
Winding power loss = (IL12 + IL22) × DCR in Watts (W)
Temperature rise = Winding power loss × 135°C
W
Examples for LPD4012-152ML:
Equal current in each winding (1.05 A):
Winding power loss = (1.05 2 + 1.05 2) × 0.134 = 0.296 W
Temperature rise = 0.296 W × 135°C = 40°C
W
Unequal current (IL1 = 1.3 A, IL2 = 0.7 A):
Winding power loss = (1.3 2 + 0.7 2) × 0.134 = 0.292 W
Temperature rise = 0.292 W × 135°C = 39.4°C
W
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. Visit www.coilcraft.com/coupledloss.
© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 580-2 Revised 02/19/09


Part Number LPD4012
Description Coupled Inductors
Maker Coilcraft
Total Page 3 Pages
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