Coilcraft FCT1-50D3SL Forward-mode transformer Datasheet

Document 574 -1
Forward-Mode Transformers
•
•
•
•
For 30 Watt
Telecommunications
Designed to meet 30 W PoE objectives of IEEE 802.3at.
Operates at 250 kHz with 36 – 72 Volts input
1500 Vrms isolation, primary and bias to the secondary
Bias winding output: 12 V; sync winding output: 5 V
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 10.1 – 10.7 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°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 175 per 13″ reel Plastic tape: 44 mm wide,
0.4 mm thick, 32 mm pocket spacing, 12.0 mm pocket depth
PCB washing Only pure water or alcohol recommended
Part
Inductance2
number1 min (µH)
FCT1-33D3SL_
FCT1-50D3SL_
FCT1-120D3SL_
FCT1-195D3SL_
FCT1-240D3SL_
72.9
72.9
72.9
72.9
72.9
DCR max (mOhms)3
pri
sec
bias
sync
27.5
27.5
27.5
27.5
27.5
5.0
10.0
28.5
32.0
72.5
250
250
250
235
235
Leakage
Turns ratio5
inductance4
max (µH) pri : sec pri : bias pri : sync
160
160
160
120
120
0.425
0.420
0.175
0.235
0.235
1 : 0.33
1:1
1 : 0.44
1:1
1:1
1:1
1 : 1.44 1 : 0.88
1 : 1.78 1 : 0.88
1 : 0.56
1 : 0.56
1 : 0.56
1 : 0.44
1 : 0.44
Output
Recommended
output
inductor6
3.3 V, 9 A
5 V, 6 A
12 V, 2.5 A
19.5 V, 1.55 A
24 V, 1.25 A
SER2013-472
SER1360-103
MSS1278-563
MSS1278-154
MSS1278-224
1. When ordering, please specify termination and packaging codes:
FCT1-240D3SLD
Termination: L = RoHS tin-silver over tin over nickel over phos bronze.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5)
or S = non-RoHS tin-lead (63/37).
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 measured at 250 kHz, 0.2 Vrms, 0 Adc.
3. DCR for the primary and secondary is with the windings connected in
parallel.
4. Leakage inductance is for the primary windings with the secondary
windings shorted.
5. Turns ratio is with the primary windings and the secondary windings
connected in parallel.
6. These inductors are recommended for 30% ripple current. Ripple less
than 30% may require the use of physically larger inductors. Allowing
higher ripple current to make use of smaller inductors may create a risk
of discontinuous output current.
7. Operating temperature range –40°C to +125°C.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
2
Pri
4
3
5
Bias
6
12
Output
inductor
Sec
10
9
8
Sync
7
The primary windings and the
secondary windings are to be
connected in parallel on the
PC board.
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
11
Document 574-1
Revised 10/28/08
Document 574-2
Forward-Mode Transformers – 30 Watts
Dot indicates pin 1
12
1
FCT1-xxD3SL
0.810 max
20,57
7
6
1.181
max
30,00
0.450 max
11,43
0.084
2,13
0.004 /0,10
0.969
24,6
0.827
21,0
6
0.028
7 0,72
0.130
3,30
0.930
23,62
1
0.050
1,27
Recommended
Land Pattern
1
Dimensions are in
12
0.118
3,0
0.118
3,0
inches
mm
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 574-2
Revised 10/28/08
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