fa2677 Coilcraft, Inc., fa2677 Datasheet

fa2677

Manufacturer Part Number

fa2677

Description

Flyback Transformersfor National Semiconductorlm5072 High Power Pd

Manufacturer

Coilcraft, Inc.

Datasheet

1.FA2677.pdf (1 pages)

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Download datasheet (180Kb)

FA2677-AL_

FA2898-AL_

FA2899-AL_

FA2900-AL_

FA2901-AL_

1. When ordering, please specify a packaging code:

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

0.450

11,43

0.810

20,57

number

Packaging: D = 13 machine ready reel. EIA-481 embossed plastic

Dot indicates pin 1

0.080

2,03

Part

max

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

Flyback Transformers

±10% (µH)

L at 0 A

FA2677-AL

tape (175 per full reel).

have a leader and trailer added ($25 charge), use

code letter D instead.

1.181

30,00

0.969

24,60

0.827

21,00

max

FA2898-ALD

min (µH)

L at Ipk

40.8

0.028

0,711

0.118

3,0

0.004 /0,10

pri

DCR max (mOhms)

Specifications subject to change without notice.

Please check our website for latest information.

0.130

3,30

Dimensions are in

sec

2.6

4.0

Recommended

Land Pattern

inches

aux

328

315

305

0.930

23,62

• Designed for 25 Watt PoE application

• Input range from 18 to 57 V

• Primary to secondary isolation: 1500 Vrms

• Auxiliary winding output: 11 V, 20 mA

Core material Ferrite

Terminations RoHS compliant tin-silver over tin over nickel over

phos bronze. Other terminations available at additional cost.

Weight 13.6 – 13.9 g

Ambient temperature –40°C to +125°C

Storage temperature Component: –40°C to +125°C.

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

Packaging 175 per 13 reel; Plastic tape: 44 mm wide, 0.4 mm thick,

32 mm pocket spacing, 11.9 mm pocket depth

PCB washing Only pure water or alcohol recommended

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

4. DCR for the primary and the secondary is with windings connected in

5. Leakage inductance measured on the primary windings with all

6. Turns ratios are with the primary windings and the secondary windings

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

8. Electrical specifications at 25°C.

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

parallel.

secondary pins shorted.

connected in parallel.

Leakage

L (µH)

2.20

1.05

0.473

0.409

0.381

0.050

1,27

0.118

3,0

pri : sec

1 : 0.12

1 : 0.18

1 : 0.35

1 : 0.47

1 : 0.59

Turns ratio

For National Semiconductor

LM5072 High Power PD

The primary windings and the secondary

windings are to be connected in parallel

on the PC board.

Aux

Pri

pri : aux

Document 592 Revised 10/29/08

1 : 0.41

Ipk

(A)

2.9

Document 592

3.3 V, 7.5 A

5 V, 5 A

9 V, 2.8 A

12 V, 2.1 A

15 V, 1.7 A

Output

Sec

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