Document 713-1

Coupled Inductors – LPR4012
HalogenFreeFor Step-Up, Resonant& Flyback Applications• Miniature, shielded coupled inductors are only 1,1 mm highand 4 mm square• 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• 100 Vrms, one minute isolation (hipot) between windings• Wide selection of turns ratios makes them suitable for avariety of voltage step-up and step-down applications• Can also be used in autotransformer applications.
• High Isat and low DCR ratings of these low profile parts
provide high efficiency and excellent current handling ina rugged, low cost design• Custom inductance values and turn ratios are available
upon request.

AEC

Q200 +85°C				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_
LPR4012-202BMR_
LPR4012-202DMR_
LPR4012-202LMR_
LPR4012-103BMR_

2.0
2.0
2.0
2.0
10.0

1 : 1.5
1:2
1:3
1 : 10
1:2

0.240
0.240
0.240
0.240
0.600

0.325
0.480
1.15
11.62
1.55

61.5
49.4
31.0
7.43
19.5

1.70
1.70
1.70
1.70
0.62

1.73
1.73
1.73
1.73
0.64

1.74
1.74
1.74
1.74
0.65

1.10
1.10
1.10
1.10
0.52

1.45
1.45
1.45
1.45
0.70

LPR4012-103DMR_
LPR4012-223BMR_
LPR4012-223DMR_

10.0
22.0
22.0

1:3
1:2
1:3

0.600
1.16
1.16

3.71
3.65
7.08

12.8
11.2
8.00

0.62
0.43
0.43

0.64
0.45
0.45

0.65
0.46
0.46

0.52
0.43
0.43

0.70
0.57
0.57

1. When ordering, please specify termination and packaging codes:
LPR4012-223XMRCTermination: 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). Quantities less than full reel available: in tape (notmachine ready) or with leader and trailer ($25 charge).
D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (3500 parts per full reel).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes.
When ordering, simply change the last letter of your part number from B to C.
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.

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 713-1

Revised 12/13/21© Coilcraft Inc. 2021
This product may not be used in medical or highrisk 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
DL2

HalogenFree

AEC

C

VOUT

AUX

–++SW

VIN

Q200 +85°C+

L1
C

D

VOUT––

Typical Buck Converter with auxiliary output++D

L1
VIN

L2

C

VOUTC

Core material Ferrite
Weight 54 – 64 mg
Terminations RoHS compliant matte tin over nickel over silver. Otherterminations 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 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)
Packaging 1000/7″ reel; 3500/13″ reel Plastic tape: 12 mm wide,0.25 mm thick, 8 mm pocket spacing, 1.45 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 additionalaqueous wash. See Doc787_PCB_Washing.pdf.

–PWM

–

Typical Flyback Converter

Dimensions are ininchesmm

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 713-2

Revised 12/13/21© Coilcraft Inc. 2021
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.