Document 560
For Silicon Laboratories
PoE Transformers Si3400 PD Controller
• Designed for Power over Ethernet PD controllers for appli-
cations up to 10 Watts.
• Operates in continuous conduction mode with 36 – 72 V input
• 1500 Vrms 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 3.8 – 3.9 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
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 200 per 13″ reel Plastic tape: 32 mm wide,
0.5 mm thick, 24 mm pocket spacing, 11.2 mm pocket depth
PCB washing Only pure water or alcohol recommended
Inductance Inductance
Leakage
DCR max (Ohms)4
Part
Power
(W)
at 0 A2
at Ipk3
inductance Turns ratio6 Ipk3
number1
±10% (µH)
min (µH)
pri
sec
max (µH)5
pri : sec
(A)
Output
FA2671-AL_
FA2672-AL_
FA2732-AL_
10
10
10
40.0
40.0
40.0
36.0
36.0
36.0
0.098
0.098
0.098
0.062
0.085
0.156
0.395
0.340
0.370
10 : 3
10 : 4
1 :1
1.3
1.3
1.3
3.3 V, 3.0 A
5.0 V, 2.0 A
12.0 V, 0.83 A
1. When ordering, please specify packaging code:
FA2672-ALD
Dot above pin1
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
0.450
11,43
max
tape (200 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.
0.004/0,10
0.041
1,05
2. Inductance is for the primary, measured at 400 kHz, 0.4 Vrms, 0 Adc.
3. Ipk is peak primary current drawn at minimum input voltage.
4. DCR for the secondary is per winding.
0.600
15,24
max
5. Leakage inductance measured between pins 2 and 3 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.
0.050
1,27
0.413
10,50
0.024
0,60
0.080
2,03
0.460
11,68
8
5
1
4
0.50
12,7
max
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
5
6
0.098
2,50
Recommended
Land Pattern
0.098
2,50
3
Pri
Sec
inches
mm
Dimensions are in
8
7
2
Secondary windings to be
connected in parallel on PC board
Specifications subject to change without notice.
Please check our website for latest information.
Document560 Revised10/29/08
© Coilcraft, Inc. 2009