Document 982F-1

Coupled Chip Inductors PFD3215
HalogenFree

For Flyback, SEPIC, Zetaand other applications

The PFD3215 has a footprint less than 3.2 × 2.3 mm,making this shielded coupled inductor ideal for applications with limited board space. It is designed for use ina variety of circuits including flyback, multi-output buck,SEPIC and Zeta.
These inductors provide high efficiency and excellent current handling in a rugged, low cost part.
They can also be used as two single inductors connected
in series or parallel, as a wideband transformers or as acommon mode choke.

AEC

Q200 +85°C++DL1CL2

VOUT

C

VIN

–
SW–

0.131
max
3,32

10.0781,984L10.059 max
1,5

Typical Flyback Converter

DL2+VOUT

C

AUX

–

L2++

32

VIN

0.006
0,15L1

DSW

VOUT

C–

–

Typical Buck Converter with auxiliary output
0.014 ±0.003
0,356 ±0,0762
14

20.030
0,762

4

3

3

12inchesmm

Recommended
Land Pattern

D+
L1

0.092
max
2,330.025
0,635

Dimensions are in

0.088
2,240.024
0,610

VIN0.0280,711

C

L2

Q

–+C1
C

–

Typical SEPIC schematic++–L2C1Q
VIN

VOUTL1CD

Typical Zeta schematic

Specificationssales@coilcraft.com
subject to change without notice.
US +1-847-639-6400
Please check ourwebsite for latest information.
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 982F-1

CVOUT–Revised 03/25/22©
© Coilcraft
Coilcraft Inc.
Inc. 2022
2022
ThisThis productproduct may
may not
not bebe usedused inin medical
medical oror highhighriskapplications
withoutpriorCoilcraftapproval.
risk applications without prior Coilcraft approval.
Specification
Specification subject
subject toto changechange without
without notice.
notice.
PleasePlease check
check webweb sitesite forfor latest
latest information.
information.

Document 982F-2

PFD3215 Coupled Inductors for SEPIC applications
HalogenFree

AEC

Q200 +85°C				Part number1

Inductance2±20% (µH)

DCR
max3(Ohms)

SRF
typ4(MHz)

Coupling
Leakagecoefficient	 inductance5
typtyp (µH)

PFD3215-391ME_
PFD3215-102ME_
PFD3215-182ME_
PFD3215-222ME_
PFD3215-332ME_

0.39
1.0
1.8
2.2
3.3

0.070
0.123
0.250
0.265
0.360

600
400
230
270
190

0.89
0.95
0.97
0.97
0.98

PFD3215-472ME_
PFD3215-682ME_
PFD3215-103ME_

4.7
6.8
10

0.450
0.630
1.25

175
155
110

0.98
0.98
0.98

1. When ordering, please specify packaging code:
PFD3215-103MEC
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape (2000 parts per full reel). Quantities less thanfull reel 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 (7500 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 areconnected in series, inductance is four times the value.

Isat (A)6		     Irms (A)	 10%
drop

20%
drop30%drop

bothonewindings7 winding8

0.08
0.09
0.11
0.13
0.14

2.10
1.35
1.00
0.95
0.75

2.30
1.55
1.20
1.05
0.83

2.40
1.65
1.30
1.15
0.90

0.98
0.85
0.60
0.57
0.55

1.39
1.20
0.85
0.81
0.78

0.17
0.25
0.31

0.65
0.55
0.45

0.75
0.65
0.50

0.80
0.70
0.55

0.51
0.40
0.27

0.72
0.57
0.38

3. DCR is for each winding. When leads are connected in parallel, DCR ishalf the value. When leads are connected in series, DCR is twice the value.
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 the primary winding with the secondary
windings shorted.
6. DC current, at which the inductance drops the specified amount from its
value without current. It is the current flowing in one winding.
7. Equal current when applied to each winding simultaneously that causes
a 40°C temperature rise from 25°C ambient. See temperature risecalculation.
8. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. See temperature rise calculation.
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.

Coupled Inductor Core and Winding Loss Calculator
This web-based utility allows you to enter frequency,
peak-to-peak (ripple) current, and Irms current to predict
temperature rise and overall losses, including core loss.
Go to online calculator.

PFD3215 Coupled Inductors for Flyback applications				Part number1Inductanceat 0 A2±20% (µH)

Inductanceat Ipk A3±20% (µH)

DCR
Leakagemax	 inductance4(Ohms)
typ (µH)

Turns
ratio

Ipk3
(A)

PFD3215-391ME_
PFD3215-102ME_
PFD3215-182ME_
PFD3215-222ME_
PFD3215-332ME_

0.39
1.0
1.8
2.2
3.3

0.27
0.70
1.26
1.54
2.31

0.070
0.123
0.250
0.265
0.360

0.08
0.09
0.11
0.13
0.14

1:1
1:1
1:1
1:1
1:1

2.40
1.65
1.30
1.150.90

PFD3215-472ME_
PFD3215-682ME_
PFD3215-103ME_

4.7
6.8
10

3.29
4.76
7.00

0.450
0.630
1.25

0.17
0.25
0.31

1:1
1:1
1:1

0.80
0.70
0.55

1. When ordering, please specify packaging code:
PFD3215-103MEC
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape (2000 parts per full reel). Quantities less thanfull reel 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 (7500 parts per
full reel).

2. Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc onan Agilent/HP 4284A LCR meter or equivalent.
3. Peak primary current drawn at minimum input voltage.
4. Leakage inductance is for the primary winding with the secondarywindings shorted.
5. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Specificationssales@coilcraft.com
subject to change without notice.
US +1-847-639-6400
Please check ourwebsite for latest information.
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 982F-2

Revised 03/25/22© 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 982F-3

PFD3215 Coupled Inductors for Flyback, SEPIC and other applications
L vs Current

L vs Frequency

HalogenFreeAEC

Q200 +85°C

Core material FerriteCore and winding loss Go to online calculator
Environmental RoHS compliant, halogen free
Weight 18 – 28 mg
Terminations Silver-palladium-platinum-glass frit.
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 250 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 2000/7″ reel; 7500/13″ reel Plastic tape: 12 mm wide,
0.23 mm thick, 4 mm pocket spacing, 1.65 mm pocket depth
PCB washing Tested with pure water or alcohol only. For othersolvents, see Doc787_PCB_Washing.pdf.

Specificationssales@coilcraft.com
subject to change without notice.
US +1-847-639-6400
Please check ourwebsite for latest information.
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 982F-3

Revised 03/25/22© 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.