US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 713-1
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.
Document 713-1 Revised 08/25/16
Primary (L1) SRF
inductance2 Turns DCR max (Ohms) typ3 Isat (A)4 Irms (A)5
Part number1 ± 20% (µH) ratio L1 L2 (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 1.70 1.73 1.74 1.10 1.45
LPR4012-202BMR_ 2.0 1 : 2 0.240 0.480 49.4 1.70 1.73 1.74 1.10 1.45
LPR4012-202DMR_ 2.0 1 : 3 0.240 1.15 31.0 1.70 1.73 1.74 1.10 1.45
LPR4012-202LMR_ 2.0 1 : 10 0.240 11.62 7.43 1.70 1.73 1.74 1.10 1.45
LPR4012-103BMR_ 10.0 1 : 2 0.600 1.55 19.5 0.62 0.64 0.65 0.52 0.70
LPR4012-103DMR_ 10.0 1 : 3 0.600 3.71 12.8 0.62 0.64 0.65 0.52 0.70
LPR4012-223BMR_ 22.0 1 : 2 1.16 3.65 11.2 0.43 0.45 0.46 0.43 0.57
LPR4012-223DMR_ 22.0 1 : 3 1.16 7.08 8.00 0.43 0.45 0.46 0.43 0.57
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 at 25°C applied to L1 that causes the specified inductance drop from its value without current.
5. Current applied to L1 that causes the specified temperature rise from 25°C ambient. This information is for reference only and does not represent absolute
maximum ratings.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Coupled Inductors
–
LPR4012 For Step-Up, Resonant
& Flyback Applications
Coupled Inductors
–
LPR4012 Series
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 713-2
0.060
1,52
0.0433 ±0.004
1,10 ±0,10
Dash
number
Dot indicates pin 1
0.155 ±0.003
3,94 ±0,076
0.155 ±0.003
3,94 ±0,076
XXXX
14
23
Recommended
Land Pattern
0.174
4,40
0.103
2,606
0.103
2,606
0.049
1,24
0.049
1,24
0.174
4,40
0.031
0,78
45°
typ
14
23
2
14
3
L1
L2
Dimensions are of the case not including
the termination. Formaximum overall
dimensions including the termination, add
0.005 in/0,13 mm.
Foroptional tin-lead and tin-silver-copper
terminations,dimensions are forthe
mounted part. Dimensions before mounting
can be an additional 0.005 inch/0,13 mm).
*
*
*
*
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
Maximum part temperature +125°C (ambient + temp rise)
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 Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Dimensions are in inches
mm
L1
L1
L2
L2
+
+
+
+
+
–
–
–
–
–
D
D
D
C
C
PWM
C
C
SW
Typical Flyback Converter
Typical Buck Converter with auxiliary output
V
OUT
V
OUT
V
OUT
AUX
VIN
VIN
Document 713-2 Revised 08/25/16
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Coilcraft:
LPR4012-223BMLB LPR4012-202BMLB LPR4012-202BMLC LPR4012-103DMLB LPR4012-202DMLC LPR4012-
103BMLC LPR4012-103BMLB LPR4012-202AMLC LPR4012-202LMLC LPR4012-223DMLC LPR4012-223BMLC
LPR4012-202DMLB LPR4012-202LMLB LPR4012-202AMLB LPR4012-103DMLC LPR4012-223DMLB
