Document 635
15 W Forward Mode Transformers
• Designed for forward topology operating at 250 kHz
• Five different outputs from 3.3 V to 15 V; 36 – 75 V input
• 1500 Vrms isolation from primary and aux to the secondary
• FCT1-50M2SL was developed for use with National
Semiconductor LM5015 and is referenced on application note
AN-1724 as CA2983-CL and on AN-1725 as GA2983-CL.
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 6.9 – 7.1 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 175 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick,
28 mm pocket spacing, 12.93 mm pocket depth
PCB washing Only pure water or alcohol recommended
Leakage
inductance4
max (µH)
Input
voltage
range (V)
DCR max (mOhms)3
Turnsratio5
Part
Inductance2
nom (µH)
number1
pri
sec
aux
pri : sec
pri : aux
Output6
FCT1-33M2SL_
FCT1-50M2SL_
FCT1-90M2SL_
FCT1-120M2SL_
FCT1-150M2SL_
705
705
705
705
705
55
55
55
55
55
6.0
13.5
33.5
46.5
72.5
320
320
320
320
320
0.510
0.425
0.340
0.340
0.310
36 – 75
36 – 75
36 – 75
36 – 75
36 – 75
1 : 0.24
1 : 0.33
1 : 0.57
1 : 0.71
1 : 0.90
1 : 0.67
1 : 0.67
1 : 0.67 9.0 V, 1.67 A
1 : 0.67 12 V, 1.25 A
3.3 V, 4.6 A
5.0 V, 3.0 A
1 : 0.67
15 V, 1.0 A
1. When ordering, please specify a packaging code:
FCT1-50M2SLD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape
(175 parts per full reel).
Dot above pin1
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, 0.5 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.
0.500
12,70
max
0.004/0,10
0.039
1,00
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.699
17,75
max
1
10
9
0.512
13,00
0.061
1,55
0.590
14,99
0.050
1,27
0.028
0,70
Primary
Secondary
1
6
5
2
7
6
Recommended
Land Pattern
0.530
13,46
max
4
Auxiliary
1
10
5
0.098
2,50
0.098
2,50
Secondary windings to be connected
in parallel on PC board.
inches
mm
Dimensions are in
Specifications subject to change without notice.
Please check our website for latest information.
Document635 Revised02/18/09
© Coilcraft, Inc. 2009