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FA2901-AL Datasheet

Flyback Transformer

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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 13reel;  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 L at 0 A2 L at Ipk3 DCR max (mOhms)4 Leakage  Turns ratio6
Ipk3
number1 ±10% (µH) min (µH)
pri
sec aux
L (µH)5 pri : sec pri : aux (A) Output7
FA2677-AL_ 50
FA2898-AL_ 50
FA2899-AL_ 50
FA2900-AL_ 50
FA2901-AL_ 50
40.8 26 2.6 328 2.20 1 : 0.12 1 :0.41
40.8 26 4.0 315 1.05 1 : 0.18 1 :0.41
40.8 26 13 315 0.473 1 : 0.35 1 :0.41
40.8 26 20 315 0.409 1 : 0.47 1 :0.41
40.8 26 37 305 0.381 1 : 0.59 1 :0.41
2.9 3.3 V, 7.5 A
2.9 5 V, 5 A
2.9 9 V, 2.8 A
2.9 12 V, 2.1 A
2.9 15 V, 1.7 A
1. When ordering, please specify a packaging code:
FA2898-ALD
Packaging: D = 13machine 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.
Dimensions are in
inches
mm
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
12
1 11
2 10
Pri Sec
47
38
59
Aux
6
The primary windings and the secondary
windings are to be connected in parallel
on the PC board.
Document 592  Revised 09/16/11
© 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.


Part Number FA2901-AL
Description Flyback Transformer
Maker Coilcraft
Total Page 1 Pages
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