FCT1-33L2SL Datasheet, PDF (1/1 Pages) Coilcraft lnc. – 8 W Forward-Mode Transformers

Document 714
8 W Forward-Mode Transformers
• 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 Two-
Switch 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
number¹
Inductance²
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 : 0.72
1 : 1.17
1 : 1.56
1 : 1.89
1 : 1.39
1 : 1.39
1 : 1.39
1 : 1.39
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
Primary
2
3
Auxiliary
8
7
Secondary
6
5
Recommended
Land Pattern
0.080
2,03
1
0.460
11,68
0.050
1,27
0.433
11,00
max
0.041
1,05
4
0.50
12,7
max
Dot above pin1
0.600
15,24
max
0.413
10,50
0.004 /0,10
0.024
0,60
5
4
Secondary windings to be connected in
parallel on PC board.
Dimensions are in
inches
mm
0.098
2,50
Specifications subject to change without notice.
Please check our website for latest information.
1
8
0.098
2,50
Document 714 Revised 02/18/09
© Coilcraft, Inc. 2009