FA2805-CLD Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformers

Document 608
Flyback Transformers ForSiliconLaboratories
Si3402 PD Controllers
• Designed for Power over Ethernet PD controllers for applica-
tions 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_ 15
40.0
FA2805-CL_ 15
40.0
FA2925-AL_ 15
40.0
Inductance
  ^{at Ipk3}
 
DCR max (Ohms)⁴
 
min (µH)
pri    sec
36.0
0.100 0.025
36.0
0.108 0.040
36.0
0.100 0.155
Leakage
  _inductance5   _{Turns ratio}6
max (µH) pri : sec
0.666
0.621
0.566
1 : 0.3
1 : 0.4
1:1
  _Ipk3
(A)
2.0
2.0
2.0
  _Output7
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
Packaging: 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.
0.500
12,70
max
0.039
1,00
7
2
8
Pri
Sec
1
10
9
Secondary windings to be con-
nected in parallel on PC board
0.080
2,03
0.590
14,99
Recommended
Land Pattern
1
Dimensions are in
inches
mm
0.050
1,27
0.098
2,50
1
0.530
13,46
max
5
Dot above pin1
01.76,9795max
0.512
13,00
0.004 /0,10
0.028
0,70
10
0.098
6 _2,50
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 608  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.