Document 592
Flyback Transformers
•
•
•
•
For Texas Instruments
LM5072 High Power PD
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.
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
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
Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf
Part
number
1
FA2677-AL_
FA2898-AL_
FA2899-AL_
FA2900-AL_
FA2901-AL_
L at 0 A
2
±10% (µH)
50
50
50
50
50
L at
Ipk
3
min (µH)
40.8
40.8
40.8
40.8
40.8
DCR max (mOhms)
4
pri
sec
aux
26
2.6
328
26
4.0
315
26
13
315
26
20
315
26
37
305
Leakage
L (µH)
5
2.20
1.05
0.473
0.409
0.381
Turns ratio
6
pri : sec pri : aux
1
:
0.12
1
:
0.41
1
:
0.18
1
:
0.41
1
:
0.35
1
:
0.41
1
:
0.47
1
:
0.41
1
:
0.59
1
:
0.41
Ipk
3
(A)
2.9
2.9
2.9
2.9
2.9
Output
7
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
1. When ordering, please specify a
packaging
code:
FA2898-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.
4. DCR for the primary and the secondary is with windings connected in
parallel.
5. Leakage inductance measured on the primary windings with all sec-
ondary pins shorted.
6. Turns ratios are with the primary windings and the secondary windings
connected in parallel.
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.
1
2
Pri
4
3
5
Aux
6
12
11
10
Sec
7
8
9
The primary windings and the secondary
windings are to be connected in parallel
on the PC board.
Dimensions are in
inches
mm
Document 592
Revised 09/16/11
US
+1-847-639-6400 sales@coilcraft.com
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
© 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.
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