Document 713-1
Coupled Inductors – LPR4012
Halogen
Free
For Step-Up, Resonant
& Flyback Applications
Q200
+
85°C
AEC
• Miniature, shielded coupled inductors are only 1,1 mm high
and 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 a
variety 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 in
a rugged, low cost design
• Custom inductance values and turn ratios are available
upon request.
Part number
1
LPR4012-202AMR_
LPR4012-202BMR_
LPR4012-202DMR_
LPR4012-202LMR_
LPR4012-103BMR_
LPR4012-103DMR_
LPR4012-223BMR_
LPR4012-223DMR_
Primary (L1)
inductance
2
± 20% (µH)
2.0
2.0
2.0
2.0
10.0
10.0
22.0
22.0
Turns
ratio
1
:
1.5
1
:
2
1
:
3
1
:
10
1
:
2
1
:
3
1
:
2
1
:
3
DCR max (Ohms)
L1
L2
0.240
0.240
0.240
0.240
0.600
0.600
1.16
1.16
0.325
0.480
1.15
11.62
1.55
3.71
3.65
7.08
SRF
typ
3
(MHz)
61.5
49.4
31.0
7.43
19.5
12.8
11.2
8.00
Isat
(A)
4
10% drop 20% drop 30% drop
1.70
1.70
1.70
1.70
0.62
0.62
0.43
0.43
1.73
1.73
1.73
1.73
0.64
0.64
0.45
0.45
1.74
1.74
1.74
1.74
0.65
0.65
0.46
0.46
Irms
(A)
5
20°C rise 40°C rise
1.10
1.10
1.10
1.10
0.52
0.52
0.43
0.43
1.45
1.45
1.45
1.45
0.70
0.70
0.57
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). Quantities less than full reel available: in tape (not
machine 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 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
+
C
V
OUT
AUX
L2
Halogen
Free
–
+
V
IN
SW
+
L1
D
C
V
OUT
Q200
+
85°C
AEC
–
–
Typical Buck Converter with auxiliary output
+
D
+
L1
L2
C
V
OUT
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 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 additional
aqueous wash. See
Doc787_PCB_Washing.pdf.
V
IN
C
PWM
–
–
Typical Flyback Converter
Dimensions are in
inches
mm
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 high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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