Coilcraft LPD3015-224ML Coupled inductors for sepic Datasheet

Document 661-1
Coupled Inductors–LPD3015 Series
For SEPIC
Applications
At only 1.4 mm high and 3 mm square, the LPD3015
is Coilcraft’s smallest shielded coupled inductor. The
excellent coupling coefficient (k ≥ 0.97) makes it ideal
for use in SEPIC applications. In SEPIC topologies,
the required inductance for each winding in a coupled
inductor 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 also be used as two single inductors connected in series or parallel, as a common mode choke
or as a 1 : 1 transformer.
D1
0.118 ±0.003
3,00 ±0,076
1
Dot indicates pin 1
+
4
XXX
2
+
L1
VIN
0.118 ±0.003
3,00 ±0,076
3
C1
L2
Q1
C2
+
Load
–
VOUT
–
Typical SEPIC schematic
Dash
number
Refer to Application Note, Document 639,
“Selecting Coupled Inductors for SEPIC Applications”
0.055 ±0.004
1,4 ±0,1
1
4
0.022
0,54
0.094 0.040
2,30 1,02
0.040
1,02
0.094
2,30
0.130
3,30
1
4
Dimensions are in
L1
2
0.130
3,30
3
2
0.039
0,99
L2
3
45°
typ
inches
mm
Core material Ferrite
Weight 45 – 52 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 Vrms
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,
0.26 mm thick, 8 mm pocket spacing, 1.65 mm pocket depth
Recommended pick and place nozzle OD: 3 mm; ID: ≤ 1.5 mm
PCB washing Only pure water or alcohol recommended
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2010
Document 661-1
Revised 09/18/09
Document 661-2
Coupled Inductors for SEPIC - LPD3015 Series
Part number1
LPD3015-391ML_
LPD3015-561ML_
LPD3015-102ML_
LPD3015-152ML_
LPD3015-182ML_
SRF typ4
(MHz)
Isat (A)5
10% drop 20% drop 30% drop
Irms (A)
both
one
windings6 winding7
Inductance2
±20% (µH)
DCR max3
(Ohms)
0.39
0.56
1.0
1.5
1.8
0.071
0.079
0.129
0.204
0.243
289
235
160
140
135
3.2
2.7
2.0
1.6
1.5
3.3
2.8
2.1
1.7
1.6
3.4
2.8
2.2
1.8
1.6
1.45
1.37
1.08
0.86
0.78
2.05
1.94
1.52
1.20
1.10
LPD3015-222ML_
LPD3015-332ML_
LPD3015-472ML_
LPD3015-682ML_
LPD3015-103ML_
2.2
3.3
4.7
6.8
10
0.263
0.337
0.503
0.622
1.040
110
90
79
58
48
1.5
1.0
0.86
0.77
0.58
1.6
1.1
0.87
0.78
0.59
1.6
1.2
0.88
0.79
0.60
0.75
0.67
0.54
0.49
0.38
1.05
0.94
0.76
0.69
0.53
LPD3015-153ML_
LPD3015-183ML_
LPD3015-223ML_
LPD3015-333ML_
LPD3015-473ML_
15
18
22
33
47
1.420
1.550
1.89
2.84
4.03
35
33
30
23
17
0.49
0.46
0.42
0.34
0.28
0.50
0.47
0.43
0.35
0.29
0.51
0.48
0.44
0.36
0.30
0.32
0.31
0.28
0.23
0.19
0.46
0.44
0.40
0.32
0.27
LPD3015-683ML_
LPD3015-104ML_
LPD3015-124ML_
LPD3015-154ML_
LPD3015-184ML_
68
100
120
150
180
6.11
8.54
9.23
12.40
15.32
14
11
9.0
8.0
7.5
0.24
0.20
0.19
0.16
0.15
0.25
0.21
0.20
0.17
0.16
0.26
0.22
0.20
0.18
0.17
0.16
0.13
0.13
0.11
0.10
0.22
0.19
0.18
0.16
0.14
LPD3015-224ML_
LPD3015-334ML_
220
330
18.56
27.70
6.0
5.0
0.13
0.11
0.14
0.12
0.15
0.12
0.09
0.07
0.13
0.10
1. Please specify termination and packaging codes:
Temperature rise calculation based on specified Irms
LPD3015-564MLC
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 = 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. 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.
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.
Winding power loss = (IL12 + IL22 ) × DCR in Watts (W)
135°C
Temperature rise = Winding power loss ×
W
Examples for LPD3015-152ML:
Equal current in each winding (1.2 A):
Winding power loss = (1.2 2 + 1.2 2) × 0.204 = 0.301 W
Temperature rise = 0.301 W × 135°C = 40.6°C
W
Unequal current (IL1 = 1.0 A, IL2 = 0.6 A):
Winding power loss = (1.0 2 + 0.6 2) × 0.204 = 0.277 W
135°C = 37.4°C
Temperature rise = 0.277 W ×
W
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2010
Document 661-2
Revised 09/18/09
Document 661-3
Coupled Inductors for SEPIC - LPD3015 Series
Typical L vs Current
Typical L vs Frequency
1000
1000
330 µH
330 µH
220 µH
220 µH
100
100 µH
Inductance (µH)
Inductance (µH)
100
33 µH
22 µH
10
10 µH
3.3 µH
2.2 µH
1
100 µH
33 µH
22 µH
10
10 µH
3.3 µH
2.2 µH
1
1.0 µH
1.0 µH
0.1
0.1
0.01
1
0.1
10
0.01
Current (A)
0.1
1
10
Frequency (MHz)
Typical Current Derating
100
90
80
70
60
50
40
30
20
25°C
Percent of rated current
120
110
Isat
Irms
10
0
-40
-20
0
20
40
60
80
100
120 140
Ambient temperature (°C)
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2010
Document 661-3
Revised 09/18/09
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