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© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Flyback Transformers
Document 592
Document 592 Revised 09/16/11
For Texas Instruments
LM5072 High Power PD
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.
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 40.8 26 2.6 328 2.20 1
:
0.12 1
:
0.41 2.9 3.3 V, 7.5 A
FA2898-AL_ 50 40.8 26 4.0 315 1.05 1
:
0.18 1
:
0.41 2.9 5 V, 5 A
FA2899-AL_ 50 40.8 26 13 315 0.473 1
:
0.35 1
:
0.41 2.9 9 V, 2.8 A
FA2900-AL_ 50 40.8 26 20 315 0.409 1
:
0.47 1
:
0.41 2.9 12 V, 2.1 A
FA2901-AL_ 50 40.8 26 37 305 0.381 1
:
0.59 1
:
0.41 2.9 15 V, 1.7 A
• 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
1
2
3
4
9
8
7
12
11
10
Aux
Pri
Sec
6
5
The primary windings and the secondary
windings are to be connected in parallel
on the PC board.
Dimensions are in inches
mm
