Document 833-1

Shielded Coupled Inductors LPD6235
HalogenFree

Tight coupling (k ≥ 0.97) makes the LPD6235 series ofcoupled inductors ideal for use in a variety of circuits
including flyback, multi-output buck, SEPIC and Zeta.
These coupled miniature shielded inductors are 3.5 mm
high and 6.0 mm square. They provide high inductance,high efficiency and excellent current handling in low
cost part.
They can be used as two single inductors connected
in series or parallel, as a common mode choke or as a1 : 1 transformer.

AEC

Q200 +125°C++DL1C

L2

VOUT

C

VIN

–SW

–

0.236 ±0.003
6,0 ±0,08

Typical Flyback Converter

L2Dot indicates pin 1

1D+VOUTCAUX–

4XXX X

2Dash
number+0.236 ±0.003
6,0 ±0,08

VIN

3

SW+

Winding
direction
DL1––

Typical Buck Converter with auxiliary output

Internal
code

D+
0.138
max
3,5

40.0471,200.167 0.079
4,25 2,00

45°
typ0.260
6,60C+

C1

L2

Q

–

C+
L2

C1

Q

–

VOUT

–

Typical SEPIC schematic+
VIN

0.079
2,000.167
4,250.260
6,600.0792,00

2VIN

32L1L1

Recommended
Land Pattern
11

VOUTCL1CD

Typical Zeta schematic

CVOUT–4Dimensions are inL2inchesmm3

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 833-1

Revised 01/28/22© Coilcraft Inc. 2022
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 833-2

Coupled Inductors – LPD6235 Series
Inductance±20% (µH)

DCRmax3(Ohms)

SRF
typ4(MHz)HalogenFree

LPD6235-682MR_
LPD6235-103MR_
LPD6235-223MR_
LPD6235-473MR_
LPD6235-104MR_

6.8
102247100

0.120
0.157
0.300
0.620
1.20

312615
9.7
7.0

0.99
0.99
>0.99
>0.99
>0.99

0.10
0.12
0.15
0.21
0.45

AEC

LPD6235-474MR_
LPD6235-105MR_
LPD6235-155MR_
LPD6235-205MR_

470
1000
1500
2000

3.50
7.00
10.816.0

3.0
1.9
1.5
1.3>0.99
>0.99
>0.99
>0.99

0.61
1.05
1.70
2.10

Q200 +125°C				Part number1

2

Coupling Leakage5
coefficient
L typtyp(µH)

1. Please specify termination and packaging codes:
LPD6235-205MRC
Termination: R = RoHS compliant matte tin over nickel over silver.
Special order:
E = RoHS compliant Silver-palladium-platinum-glass frit.
P = non-RoHS tin-lead (63/37)
			Q = RoHS tin-silver-copper (95.5/4/0.5)
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastictape (350 parts per full reel). Quantities less than fullreel available: in tape (not machine ready) or withleader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our partnumbering system, Coilcraft is eliminating the needfor multiple packaging codes. When ordering, simply
change the last letter of your part number from B to C.
D = 13″ machine-ready reel. EIA-481 embossed plastictape. Factory order only, not stocked (1500 parts per
full reel).
2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms,
0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads
are connected in parallel, inductance is the same value. When leads
are connected in series, inductance is four times the value.
3. DCR is for each winding. When leads are connected in parallel, DCR
is half the value. When leads are connected in series, DCR is twice thevalue.
4. SRF measured using an Agilent/HP 4191A or equivalent. When leads
are connected in parallel, SRF is the same value.
5. Leakage inductance is for L1 and is measured with L2 shorted.
6. DC current at 25°C that causes the specified inductance drop from its
value without current. It is the sum of the current flowing in both windings.
7. Equal current when applied to each winding simultaneously thatcauses a 40°C temperature rise from 25°C ambient. This information isfor reference only and does not represent absolute maximum ratings.
8. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. This information is for reference
only and does not represent absolute maximum ratings.
9. Electrical specifications at 25°C.
Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.”
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

10%
drop
2.80
2.50
1.50
0.90
0.62

0.18
0.12
0.12
0.08

Isat (A)6		     Irms (A)20%30%bothonedrop
drop
windings7 winding8
3.00
3.12
1.40
1.98
2.70
2.80
1.30
1.83
1.67
1.73
0.85
1.20
0.98
0.99
0.60
0.85
0.72

0.74

0.40

0.56

0.22
0.14
0.12
0.11

0.23
0.15
0.13
0.12

0.25
0.15
0.14
0.11

0.35
0.21
0.20
0.16

Coupled Inductor Core and Winding Loss CalculatorThis web-based utility allows you to enter frequency, peak-to-peak(ripple) current, and Irms current to predict temperature rise and overalllosses, including core loss. Visit www.coilcraft.com/coupledloss.

Core material Ferrite
Weight 420 – 480 mg
Environmental RoHS compliant, halogen freeTerminations RoHS compliant matte tin over nickel over silver.
Other terminations available at additional cost.
Ambient temperature –40°C to +125°C with (40°C rise) Irms current.
Maximum part temperature +165°C (ambient + temp rise).
Storage temperature Component: –40°C to +165°C.
Tape and reel packaging: –40°C to +80°C
Winding to winding isolation 100 Vrms, one minute
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 350/7″ reel; 1500/13″ reel Plastic tape: 16 mm wide,
0.3 mm thick, 12 mm pocket spacing, 3.68 mm pocket depth
Recommended pick and place nozzle OD: 6.2 mm; ID: ≤ 3.1 mm
PCB washing Tested to MIL-STD-202 Method 215 plus an additionalaqueous wash. See Doc787_PCB_Washing.pdf.

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 833-2

Revised 01/28/22© Coilcraft Inc. 2022
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 833-3

Coupled Inductors – LPD6235 Series+10000

10000

2000 µH
1500 µH
1000 µH

1000

470 µH
100100 µH
47 µH
22 µH

101500 µH
1000 µH

470 µH

22 µH

1147 µH

10 µH
6.8 µH10.1

100 µH

1001010 µH
6.8 µH

0.01

2000 µH

1000

Inductance (µH)

AEC
Q200 125°C

L vs Frequency

Inductance (µH)

HalogenFree

L vs Current

100.1

Current (A)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

1

10100

Frequency (MHz)Document 833-3

Revised 01/28/22© Coilcraft Inc. 2022
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.