Coilcraft FA2805-CLD Flyback transformer Datasheet

Document 608
Flyback Transformers
For Silicon Laboratories
Si3402 PD Controllers
• Designed for Power over Ethernet PD controllers for applications up to 15 Watts.
• Operates in continuous conduction mode with 36 – 57 V input
• 1500 Vrms, one minute isolation between primary and secondary
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 6.57 – 6.71 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
Packaging 175 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick,
28 mm pocket spacing, 12.93 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf
Inductance
Part
Power at 0 A2
number1
(W)
±10% (µH)
FA2924-AL_
FA2805-CL_
FA2925-AL_
15
15
15
Inductance
DCR max (Ohms)4
at Ipk3
min (µH)
pri sec
40.0
40.0
40.0
36.0
36.0
36.0
0.100
0.108
0.100
0.025
0.040
0.155
Leakage
inductance5 Turns ratio6
max (µH)
pri : sec
0.666
0.621
0.566
1 : 0.3
1 : 0.4
1:1
Ipk3
(A)
Output7
2.0
2.0
2.0
3.3 V, 4.5 A
5.0 V, 3.0 A
12.0 V, 1.25 A
1. When ordering, please specify packaging code:
FA2925-ALD
D = 13″ machine-ready reel. EIA-481 embossed plastic tape (175 parts 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 200 kHz, 0.2 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 1 and 2 with all secondary pins shorted.
6. Turns ratio is with 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.
Packaging:
Dot above pin1
0.500 max
12,70
0.004 /0,10
0.039
1,00
2
7
8
Pri
Sec
1
10
9
Secondary windings to be connected in parallel on PC board
0.080
2,03
0.590
14,99
0.050
1,27
Dimensions are in
inches
mm
0.512
13,00
1
Recommended
Land Pattern
1
0.699 max
17,75
0.028
0,70
10
0.530 max
13,46
0.098
2,50
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
5
6
Document 608
0.098
2,50
Revised 03/14/12
© 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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