LPD4012

Document 580-1
Coupled Inductors – LPD4012
For Flyback, SEPIC
and other Applications
• Only 1.1 mm high and 4 mm square
• Ideal for use in flyback, multi-output buck and SEPIC
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
C
L2
VOUT
C
VIN
–
SW
–
Typical Flyback Converter
D
L2
+
VOUT
C
AUX
–
+
VIN
0.155 ±0.003
3,94 ±0,076
Dash
number
0.155 ±0.003
3,94 ±0,076
VIN
Internal
code
–
Recommended
Land Pattern
1
4
0.031
0,78
0.103 0.049
2,606 1,24
1
2
4
L2
45°
typ
0.174
4,40
3
2
L1
D
+
L1
0.0433 ±0.004
1,10 ±0,10
0.049
1,24
0.103
2,606
0.174
4,40
Dimensions are in
3
VOUT
C
–
3
0.060
1,52
D
Typical Buck Converter with auxiliary output
4
XXX X
SW
–
Dot indicates pin 1
1
2
+
L1
inches
mm
C
+
C1
Q
L2
Typical SEPIC schematic
C
VOUT
–
Core material Ferrite
Core and winding loss Go to online calculator
+
+
Weight 54 – 64 mg
C1 halogen freeL2
Environmental RoHS compliant,
Q
Terminations RoHS compliant
D over nickel over
C
C silver.VOUT
VIN
L1 matte tin
Other terminations available at additional cost.
Ambient temperature –40°C to +85°C with (40°C rise) Irms current.
–
–
Maximum
part temperature +125°C (ambient + temp rise).
Typical Zeta schematic
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 to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Document 580-1 Revised 11/09/15
Document 580-2
Coupled Inductors for SEPIC Applications – LPD4012 Series
Isat (A)6 Irms (A)
CouplingLeakage
2 3 4
5
Inductance DCR max SRF typ coefficient
L typ
10% 20%
30%
both
one
Part number1
(µH) (Ohms) (MHz)
typ
(µH) drop dropdrop windings7 winding8
LPD4012-331NR_ 0.33 ±30% 0.042
LPD4012-561NR_ 0.56 ±30% 0.087
LPD4012-821NR_ 0.82 ±30% 0.100
LPD4012-152NR_ 1.5 ±30%
0.185
LPD4012-222NR_ 2.2 ±30% 0.235
255
185
130
86
70
0.94
0.95
0.97
0.97
0.98
0.06
0.08
0.09
0.11
0.14
5.2
3.7
3.2
2.50
2.30
5.4
3.8
3.3
2.81
2.40
5.6
3.9
3.4
2.91
2.50
1.87
1.30
1.21
1.15
0.95
2.65
1.84
1.72
1.62
1.35
0.98
0.98
0.99
0.99
0.99
0.16
0.18
0.20
0.22
0.24
1.80
1.60
1.50
1.20
1.10
1.90
1.70
1.60
1.52
1.20
2.00
1.80
1.60
1.63
1.30
0.75
0.65
0.55
0.60
0.55
1.06
0.92
0.78
0.86
0.78
LPD4012-332NR_ 3.3 ±30%
LPD4012-472MR_ 4.7 ±20%
LPD4012-562MR_ 5.6 ±20%
LPD4012-682MR_ 6.8 ±20%
LPD4012-822MR_ 8.2 ±20%
0.320
0.500
0.620
0.530
0.600
48
39
32
31
29
LPD4012-103MR_ 10 ±20%
LPD4012-153MR_ 15 ±20%
LPD4012-223MR_ 22 ±20%
LPD4012-333MR_ 33 ±20%
LPD4012-473MR_ 47 ±20%
0.750
1.13
1.63
1.83
2.52
25
21
15
12
8.8
0.99
0.99
0.99
>0.99
>0.99
0.26
0.30
0.34
0.41
0.51
0.98
0.90
0.70
0.37
0.33
1.00
0.92
0.82
0.57
0.39
1.10
0.94
0.84
0.58
0.40
0.50
0.43
0.34
0.31
0.28
0.71
0.60
0.48
0.44
0.39
LPD4012-683MR_ 68 ±20%
LPD4012-823MR_ 82 ±20%
LPD4012-104MR_ 100 ±20%
LPD4012-124MR_ 120 ±20%
LPD4012-154MR_ 150 ±20%
3.23
3.66
4.76
5.54
6.90
7.8
7.3
6.1
5.3
4.6
>0.99
>0.99
>0.99
>0.99
>0.99
0.66
0.75
0.86
0.98
1.19
0.27
0.27
0.22
0.21
0.18
0.36
0.27
0.28
0.26
0.26
0.37
0.29
0.29
0.27
0.27
0.25
0.23
0.20
0.19
0.17
0.36
0.31
0.27
0.27
0.23
8.75
11.24
17.00
4.1
3.3
2.8
>0.99
>0.99
>0.99
1.40
1.66
2.45
0.16
0.15
0.13
0.21
0.16
0.16
0.23
0.17
0.16
0.14
0.12
0.10
0.18
0.17
0.14
LPD4012-184MR_
LPD4012-224MR_
LPD4012-334MR_
180 ±20%
220 ±20%
330 ±20%
1. Please specify termination and packaging codes:
Coupled Inductor Core and Winding Loss Calculator
LPD4012-334MRC
Termination:R= RoHS compliant, matte tin over nickel over silver.
Special order:
Q = RoHS tin-silver-copper (95.5/4/0.5) or
P = 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 25°C that causes the specified inductance drop 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. This information is
for reference only and does not represent absolute maximum ratings.
8. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. This information is for reference
only and does not represent absolute maximum ratings.
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.
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.
Document 580-2 Revised 11/09/15
Document 580-2 Revised 02/15/11
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
0.1
0.01
0.1
Current (A)
0.33 µH
1
10
0.1
0.1
1
10
Frequency (MHz)
100
Document 580-3 Revised 11/09/15
Document 580-3 Revised 02/15/11