LPR4012_13 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – For Step-Up, Resonant & Flyback Applications

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.

Primary (L1)    
^  inductance² Turns      ^{DCR max (Ohms)}
  _{Part number}1 _{± 20% (µH) ratio}
L1
L2
LPR4012-202AML_
2.0
LPR4012-202BML_
2.0
LPR4012-202DML_
2.0
LPR4012-202LML_
2.0
LPR4012-103BML_
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
LPR4012-103DML_
10.0
1:3
0.600 3.71
LPR4012-223BML_
22.0
1:2
1.16
3.65
LPR4012-223DML_
22.0
1:3
1.16
7.08
SRF
  _typ3    Isat (A)⁴       Irms (A)⁵
(MHz) 10% drop 20% drop 30% drop 20°C rise 40°C rise
61.5
49.4
31.0
7.43
19.5
1.70
1.73
1.74
1.70
1.73
1.74
1.70
1.73
1.74
1.70
1.73
1.74
0.62
0.64
0.65
1.10
1.45
1.10
1.45
1.10
1.45
1.10
1.45
0.52
0.70
12.8
11.2
8.00
0.62
0.64
0.65
0.43
0.45
0.46
0.43
0.45
0.46
0.52
0.70
0.43
0.57
0.43
0.57
1. When ordering, please specify termination and packaging codes:
LPR4012-223XMLC
Termination: L = RoHS compliant Silver-palladium-platinum-glass frit.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or
S = 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 [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 713-1  Revised 01/29/10
© Coilcraft Inc. 2013
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.