Flyback Transformers

Document 460-1

For 3 Watt, 7 Watt and 13 Watt

PoE Applications

Inductance Inductance

Leakage

Part

Power

(W)

±10% (µH)

min (µH) pri

bias

sec

(A)

POE30P-33L_

3

310

279.0

1.02

2.01

0.066

4.75

1

: 0.19

1

: 0.70

0.3

3.3 V, 0.91 A

POE30P-50L_

3

310

279.0

1.02

2.01

0.118

4.50

1

: 0.28

1

: 0.70

0.3

5.0 V, 0.6 A

POE30P-12L_

3

310

279.0

1.04

2.01

0.700

4.25

1

: 0.70

1

: 0.70

0.3

12 V, 0.25 A

POE70P-33L_

7

155

139.5

0.414

0.822

0.036

4.00

1

: 0.19

1

: 0.667

0.65 3.3 V, 2.12 A

POE70P-50L_

7

155

139.5

0.414

0.822

0.060

3.60

1

: 0.262

1

: 0.667

0.65

5.0 V, 1.4 A

POE70P-12L_

7

155

139.5

0.414

0.822

0.343

3.25

1

: 0.667

1

: 0.667

0.65

12 V, 0.6 A

POE13P-33L_

13

127

114.3

0.255

0.310

0.024

1.25

1

: 0.166

1

: 0.50

1.0

3.3 V, 4.0 A

POE13P-50L_

13

127

114.3

0.222

0.348

0.039

0.950

1

: 0.25

1

: 0.50

1.0

5.0 V, 2.6 A

POE13P-12L_

13

127

114.3

0.199

0.308

0.065

0.650

1

: 0.50

1

: 0.50

1.0

12 V, 1.08 A

POE13P-19L_

13

127

114.3

0.290

0.355

0.066

0.800

1

: 0.567

1

: 0.50

1.0

19.5 V, 0.67 A

POE13P-24L_

13

127

114.3

0.255

0.315

0.067

0.600

1

: 0.667

1

: 0.50

1.0

24 V, 0.54 A

1. When ordering, please specify

packaging code:

POE30P-12LD

Packaging: D = 13

″ machine-ready reel. EIA-481 embossed plastic

tape.

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, 0.1 Vrms, 0 Adc.

3. Ipk is peak primary current drawn at minimum input voltage.

4. DCR for the secondary is per winding.

5. Leakage inductance measured between pins 3 and 4 with all other pins

shorted.

6. Turns ratio is with the secondary windings connected in parallel.

7. Output of the secondary is with the windings connected in parallel. Bias

winding output is 12 V, 20 mA.

8. Electrical specifications at 25°C.

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

4

1

3

2

8

6

Bias

Pri

Sec

5

7

4

1

3

2

10

8

Bias

Pri

Sec

7

9

Schematics

POE13P

POE70P, POE30P

Secondary windings to be con-

nected in parallel on PC board

Secondary windings to be con-

nected in parallel on PC board

• Flyback transformers for PoE applications

• Designed to operate in continuous mode at 250 kHz with an

input of 36–72 Vdc

• 1500Vrms,oneminuteisolationfromprimaryandbiastosecond-

ary; 500 Vrms, 1 minute isolation between all other windings

Designer’s Kit C395 contains two of each part shown in bold

Core material Ferrite

Terminations RoHS tin-silver over tin over nickel over phos bronze.

Other terminations available at additional cost.

Weight POE13P: 6.15 g; POE70P: 3.85 g; POE30P: 2.05 g

Ambient temperature –40°C to +85°C

Storage temperature Component: –40°C to +85°C.

Tape and reel packaging: –40°C to +80°C

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)

Failures in Time (FIT) / Mean Time Between Failures (MTBF)

38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

PCB washing Tested to MIL-STD-202 Method 215 plus an additional

aqueous wash. See Doc787_PCB_Washing.pdf.

Document 460-1 Revised 05/04/12