LPR4012

Document 713-1
Coupled Inductors – LPR4012
For Step-Up, Resonant
& Flyback Applications
The LPR4012 miniature shielded coupled inductors are
only 1,1 mm high and 4 mm square. The excellent coupling
coefficient (k = 0.95) makes them ideal for use as flyback
transformers in DC-DC converters or as coupled inductors
in buck regulators to provide multiple outputs. The wide
selection of turns ratios makes them suitable for a variety
of voltage step-up and step-down applications. They can
also be used in autotransformer applications.
The high Isat and low DCR ratings of these low profile
parts provide high efficiency and excellent current handling
in a rugged, low cost design.
Custom inductance values and turn ratios are available
upon request.
Part number1
Primary (L1) inductance2 Turns DCR max (Ohms)
± 20% (µH) ratio
L1
L2
SRF
4
Irms (A)5
typ3 Isat (A) (MHz)
10% drop 20% drop 30% drop 20°C rise 40°C rise
LPR4012-202AMR_2.0 1 : 1.5
0.240
0.325
61.5
LPR4012-202BMR_2.0 1 : 20.240
0.480
49.4
LPR4012-202DMR_2.0 1 : 30.240
1.1531.0
LPR4012-202LMR_2.0 1 : 10
0.240
11.62 7.43
LPR4012-103BMR_10.0 1 : 20.600
1.5519.5
1.701.731.74
1.701.731.74
1.701.731.74
1.701.731.74
0.620.640.65
1.101.45
1.101.45
1.101.45
1.101.45
0.520.70
LPR4012-103DMR_10.0 1 : 30.600
3.7112.8 0.620.640.65 0.520.70
LPR4012-223BMR_22.0 1 : 21.16
3.6511.2 0.430.450.46 0.430.57
LPR4012-223DMR_22.0 1 : 31.16
7.08 8.00 0.430.450.46 0.430.57
1. When ordering, please specify termination and packaging codes:
LPR4012-223XMRC
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 is measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A LCR meter or equivalent.
3. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value.
4. DC current applied to L1, at which the inductance drops the specified amount from its value without current.
5. Current applied to L1 that causes the specified temperature rise from 25°C ambient.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 713-1 Revised 04/18/14
© 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 713-2
Coupled Inductors – LPR4012 Series
D
L2
+
VOUT
C
AUX
–
+
+
L1
SW
VIN
VOUT
C
D
–
–
Typical Buck Converter with auxiliary output
+
+
D
L1
VIN
C
L2
VOUT
C
Core material Ferrite
Weight 54 – 64 mg
Terminations RoHS compliant matte tin over nickel over silver. 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)
Mean Time Between Failures (MTBF) 26,315,789 hours
Failures in Time (FIT) 38 per one billion hours
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
–
PWM
Current Derating
–
Typical Flyback Converter
120
110
100
2
4
XXXX
1
0.155 ±0.003
3,94 ±0,076
4
L1
L2
3
2
3
Dash
number
0.0433 ±0.004
1,10 ±0,10
0.155 ±0.003
3,94 ±0,076
4
0.031
0,78
0.103 0.049
2,606 1,24
Dimensions are in
inches
mm
70
60
50
40
30
20
Isat
Irms
-40
-20
0
20
40
60
80
100
120 140
Ambient temperature (°C)
45°
typ
0.174
4,40
3
2
0.060
1,52
80
10
0
Recommended
Land Pattern
1
90
25°C
1
Percent of rated current
Dot indicates pin 1
0.049
1,24
0.103
2,606
0.174
4,40
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 713-2 Revised 04/18/14
© 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.