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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.

PoE Transformer

Document 549

Document 549 Revised 09/12/11

For National Semiconductor

LM5071 & LM5072 PD Controllers

1. When ordering, please specify a

packaging code:

FA2519-ALD

Packaging: D = 13

″ machine ready reel. EIA-481 embossed plastic

tape (175 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.

2. Inductance is for the primary, measured at 250 kHz, 0.7 Vrms, 0 Adc.

3.

Ipk is the peak current drawn at minimum input voltage.

The FA2519-AL surface mount flyback transformer was

developed specifically for National Semiconductor LM5071

and LM5072 Powered Devices Controllers in 13 Watt

Power over Ethernet (PoE) applications.

It is designed to operate at 250 kHz with a PoE input volt-

age of 36– 72 Volts. It can also accept a 12 V input from

auxiliary sources. Output with the secondary windings

connected in parallel, is 3.3V, 3.3A. Output of the auxiliary

winding is 10V, 20mA.

Coilcraft can also design custom transformers with volt-

age, inductance and DCR values to meet your specific

requirements.

For free evaluation samples, contact Coilcraft or order

them on-line at

www.coilcraft.com.

6

5

Aux

Pri

Sec

12

9

8

7

10

11

1

3

4

2

4. DCR for the primary and for the secondary is with the windings con-

nected in parallel.

5. Leakage inductance measured on the primary windings with all second-

ary pins shorted.

6. Turns ratio is with the primary windings and the secondary windings

connected in parallel.

7. Isolation is from primary and auxiliary windings to secondary windings

for one minute.

8. Operating temperature range –40°C to +125°C.

9. Electrical specifications at 25°C.

Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Weight 13.5 g

Terminations Tin-silver over tin over nickel over phos bronze

Packaging 175 per 13

″ reel Plastic tape: 44 mm wide,

0.4 mm thick, 28 mm pocket spacing, 11.9 mm pocket depth

Part

±10% (µH)

±10% (µH)

pri

aux

sec

(µH)

pri : sec pri : aux

(A)

(Vrms)

FA2519-AL_

55

40.2

0.026 0.388 0.0026

0.62

1

: 0.20

1

: 0.60

2.4

1500

Primary windings and secondary

windings to be connected in parallel

on PC board.

Dimensions are in

inches

mm