Document 715
4 W Forward Mode Transformers
• Designed for forward topology operating at 250 kHz
• Five outputs from 3.3 V to 15 V; 9 – 18 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
2.0 – 2.1g
Ambient temperature
–40°C to +85°C
Storage temperature
Component: –40°C to +85°C.
Tape and reel 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
350 per 13″ reel Plastic tape: 32 mm wide, 0.42 mm thick,
20 mm pocket spacing, 9.16 mm pocket depth
PCB washing
Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
Part
Inductance
2
number
1
nom (µH)
FCT1-33K2SL_
120
FCT1-50K2SL_
120
FCT1-90K2SL_
120
FCT1-120K2SL_
120
FCT1-150K2SL_
120
DCR max (mOhms)
3
pri
sec
aux
48
53
720
48
88
735
48
218
745
48
420
705
48
532
732
Leakage
inductance
4
max (µH)
0.195
0.205
0.165
0.170
0.215
Input
voltage
range (V)
9 – 18
9 – 18
9 – 18
9 – 18
9 – 18
Turns ratio
5
pri : sec
pri : aux
1
:
1.0
1
:
2.8
1
:
1.4
1
:
2.8
1
:
2.3
1
:
2.8
1
:
3.0
1
:
2.8
1
:
3.7
1
:
2.8
Output
6
3.3 V, 1.2 A
5 V, 0.8 A
9 V, 0.44 A
12 V, 0.33 A
15 V, 0.27 A
1. When ordering, please specify a
packaging
code:
FCT1-50K2SLD
Packaging: D
= 13″ machine ready reel. EIA-481 embossed plastic tape
(350 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 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
4
Secondary winding 7 – 6 not used on FCT1-120K2SL
and FCT1-150K2SL. For other parts, secondary wind-
ings to be connected in parallel on PC board.
0.050
1,27
8
7
Secondary
6
5
0.080
2,03
Dot above pin1
0.355 max
9,02
0.004 /0,10
0.520 max
13,21
0.339
8,60
5
4
0.041
1,05
Recommended
Land Pattern
1
0.370
9,40
0.098
2,50
0.028
0,70
0.430 max
10,92
1
0.098
2,50
8
Dimensions are in
inches
mm
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 715
Revised 02/18/09
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.