Coilcraft FCT1-50L2SL 8 w forward-mode transformer Datasheet

Document 714
8 W Forward-Mode Transformers
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Designed for forward topology operating at 250 kHz
Five outputs from 3.3 V to 15 V; 18 – 36 V input
1500 Vrms isolation from primary and aux to the secondary
Specified by National Semiconductor for its LM5015 TwoSwitch Forward Regulator
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 4.0 – 4.3 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
Part
Inductance2
number1
nom (µH)
FCT1-33L2SL_
324
FCT1-50L2SL_
324
FCT1-90L2SL_
324
FCT1-120L2SL_
324
FCT1-150L2SL_
324
DCR max (mOhms)3
pri
sec
aux
65
22.5
460
65
31
490
65
105
490
65
150
535
65
223
470
Leakage
inductance4
max (µH)
0.530
0.585
0.570
0.525
0.600
Input
voltage
range (V)
18 – 36
18 – 36
18 – 36
18 – 36
18 – 36
Turns ratio5
pri : sec
pri : aux
1 : 0.5
1 : 1.39
1 : 0.72
1 : 1.39
1 : 1.17
1 : 1.39
1 : 1.56
1 : 1.39
1 : 1.89
1 : 1.39
Output6
3.3 V, 2.4 A
5 V, 1.6 A
9 V, 0.89 A
12 V, 0.67 A
15 V, 0.53 A
1. When ordering, please specify a packaging code:
FCT1-50L2SLD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic 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.
2. Inductance is measured at 250 kHz, 0.3 Vrms, 0 Adc.
3. DCR for the secondary is measured with the windings connected in parallel.
4. Leakage inductance is for the primary and is measured with the secondary shorted.
5. Turns ratio is with the secondary windings connected in parallel.
6. Output is with the secondary windings connected in parallel. Auxiliary winding output is 10 V, 20 mA.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
Recommended
Land Pattern
8
7
Primary
Secondary
2
3
6
5
0.080
2,03
1
0.460
11,68
0.433
max
11,00
0.600
max
15,24
0.413
10,50
0.024
0,60
5
4
0.50
max
12,7
4
Dimensions are in
inches
mm
0.098
2,50
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
0.004 /0,10
0.041
1,05
0.050
1,27
Auxiliary
Secondary windings to be connected in
parallel on PC board.
Dot above pin1
1
8
0.098
2,50
Document 714
Revised 02/18/09
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