Coilcraft LPD4012-562ML Coupled inductor Datasheet

Document 580-1
Coupled Inductors–LPD4012
For SEPIC and other
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 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.
0.155 ±0.003
3,94 ±0,076
D1
+
Dot indicates pin 1
1
4
XXX X
2
Dash
number
VIN
0.155 ±0.003
3,94 ±0,076
3
Recommended
Land Pattern
4
0.031
0,78
0.103 0.049
2,606 1,24
4
45°
typ
0.174
4,40
3
2
0.060
1,52
+
Load
VOUT
–
0.049
1,24
0.103
2,606
0.174
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 1000/7″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 Only pure water or alcohol recommended
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2010
C2
Typical SEPIC schematic
1
2
L2
Q1
Refer to Application Note, Document 639,
“Selecting Coupled Inductors for SEPIC Applications”
0.0433 ±0.004
1,10 ±0,10
L1
C1
–
Internal
code
1
+
L1
Document 580-1
Revised 09/18/09
Document 580-2
Coupled Inductors for SEPIC Applications – LPD4012 Series
Irms (A)
both
one
windings6 winding7
DCR max3
(Ohms)
LPD4012-331NL_
LPD4012-561NL_
LPD4012-821NL_
LPD4012-152ML_
LPD4012-222ML_
0.33 ±30%
0.56 ±30%
0.82 ±30%
1.5 ±20%
2.2 ±20%
0.042
0.087
0.100
0.134
0.176
255
185
130
86
70
5.2
3.7
3.2
2.6
2.3
5.4
3.8
3.3
2.7
2.4
5.6
3.9
3.4
2.8
2.5
1.87
1.30
1.21
1.05
0.91
2.65
1.84
1.72
1.48
1.29
LPD4012-332ML_
LPD4012-472ML_
LPD4012-562ML_
LPD4012-682ML_
LPD4012-822ML_
3.3 ±20%
4.7 ±20%
5.6 ±20%
6.8 ±20%
8.2 ±20%
0.242
0.370
0.467
0.500
0.545
48
39
32
31
29
1.8
1.6
1.5
1.3
1.1
1.9
1.7
1.6
1.4
1.2
2.0
1.8
1.6
1.5
1.3
0.78
0.63
0.56
0.54
0.52
1.10
0.89
0.79
0.77
0.74
Part number1
SRF typ4
(MHz)
Isat (A)5
10% drop 20% drop 30% drop
Inductance2
(µH)
LPD4012-103ML_
LPD4012-153ML_
LPD4012-223ML_
LPD4012-333ML_
LPD4012-473ML_
10 ±20%
15 ±20%
22 ±20%
33 ±20%
47 ±20%
0.638
0.940
1.52
1.74
2.20
25
21
15
12
8.8
0.98
0.79
0.74
0.45
0.35
1.0
0.82
0.78
0.47
0.37
1.1
0.84
0.79
0.48
0.38
0.48
0.40
0.31
0.29
0.26
0.68
0.56
0.44
0.41
0.37
LPD4012-683ML_
LPD4012-823ML_
LPD4012-104ML_
LPD4012-124ML_
LPD4012-154ML_
68 ±20%
82 ±20%
100 ±20%
120 ±20%
150 ±20%
3.19
3.41
4.76
5.20
6.90
7.8
7.3
6.1
5.3
4.6
0.30
0.26
0.24
0.23
0.21
0.32
0.28
0.26
0.24
0.22
0.33
0.30
0.27
0.25
0.23
0.21
0.21
0.18
0.17
0.15
0.30
0.29
0.25
0.24
0.21
LPD4012-184ML_
LPD4012-224ML_
LPD4012-334ML_
LPD4012-474ML_
LPD4012-564ML_
180 ±20%
220 ±20%
330 ±20%
470 ±20%
560 ±20%
7.90
9.80
15.12
20.90
22.10
4.1
3.3
2.8
2.3
2.1
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
0.14
0.12
0.10
0.08
0.08
0.19
0.17
0.14
0.12
0.12
Temperature rise calculation based on specified Irms
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 = 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 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
135°C = 39.4°C
Temperature rise = 0.292 W ×
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.
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2010
Document 580-2
Revised 09/18/09
Document 580-3
Coupled Inductors for SEPIC Applications – LPD4012 Series
Typical L vs Current
Typical L vs Frequency
1000
1000
330 µH
330 µH
100 µH
33 µH
10 µH
10
100 µH
100
Inductance (µH)
Inductance (µH)
100
3.3 µH
1.5 µH
33 µH
10 µH
10
3.3 µH
1.5 µH
1
1
0.33 µH
0.33 µH
0.1
0.1
0.01
1
0.1
10
0.1
1
10
100
Frequency (MHz)
Current (A)
Typical Current Derating
120
110
90
80
70
60
50
40
30
20
25°C
Percent of rated current
100
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 580-3
Revised 09/18/09
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