Specifications subject to change without notice.

Please check our website for latest information.

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© 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.

Document 982F-2 Revised 12/05/12

Document 982F-2

DCR

SRF

Coupling

Leakage

Irms (A)

coefficient

10%

20%

30%

both

one

±20% (µH)

(Ohms)

(MHz)

typ

typ (µH)

drop

drop

drop

PFD3215-391ME_

0.39

0.070

600

0.89

0.08

2.10

2.30

2.40

0.98

1.39

PFD3215-102ME_

1.0

0.123

400

0.95

0.09

1.35

1.55

1.65

0.85

1.20

PFD3215-182ME_

1.8

0.250

230

0.97

0.11

1.00

1.20

1.30

0.60

0.85

PFD3215-222ME_

2.2

0.265

270

0.97

0.13

0.95

1.05

1.15

0.57

0.81

PFD3215-332ME_

3.3

0.360

190

0.98

0.14

0.75

0.83

0.90

0.55

0.78

PFD3215-472ME_

4.7

0.450

175

0.98

0.17

0.65

0.75

0.80

0.51

0.72

PFD3215-682ME_

6.8

0.630

155

0.98

0.25

0.55

0.65

0.70

0.40

0.57

PFD3215-103ME_

10

1.25

110

0.98

0.31

0.45

0.50

0.55

0.27

0.38

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).

B = Less than full reel. In tape, but not machine ready. To have

a leader and trailer added ($25 charge), use code letter C

instead.

D = 13

″ machine-ready reel. EIA-481 embossed plastic tape. Fac-

tory 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 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 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 rise calculation.

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.

Inductance

Inductance

DCR

Leakage

max

Turns

±20% (µH)

±20% (µH)

(Ohms)

typ (µH)

ratio

(A)

PFD3215-391ME_

0.39

0.27

0.070

0.08

1

: 1

2.40

PFD3215-102ME_

1.0

0.70

0.123

0.09

1

: 1

1.65

PFD3215-182ME_

1.8

1.26

0.250

0.11

1

: 1

1.30

PFD3215-222ME_

2.2

1.54

0.265

0.13

1

: 1

1.15

PFD3215-332ME_

3.3

2.31

0.335

0.14

1

: 1

0.90

PFD3215-472ME_

4.7

3.29

0.442

0.17

1

: 1

0.80

PFD3215-682ME_

6.8

4.76

0.600

0.25

1

: 1

0.70

PFD3215-103ME_

10

7.00

1.22

0.31

1

: 1

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).

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 (7500 parts per

full reel).

PFD3215 Coupled Inductorsfor SEPIC applications

PFD3215 Coupled Inductorsfor Flyback applications

2. Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc on

an 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 secondary

windings shorted.

5. Electrical specifications at 25°C.

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.