3D Model Datasheet

FCT1-xxK2SL Forward Converter Transformers

for 4 Watt Applications

Developed for Texas Instruments LM5015 Two-Switch Forward Regulator
Designed for forward topology operating at 250 kHz; Input voltage range: 9 – 18 V
Five versions for 3.3, 5, 9, 12 and 15 Volt output

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Count	Unit price
1	$4.33
350	$3.71
700	$2.23
1400	$1.73
2800	$1.50
5000	$1.37

For high volume or non-stock items, request a quote.

Packaging

D = 13" machine-ready reel

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Typical Application

Works with Texas Instruments LM5015

Part number	Input Voltage	Output 1		Power	Fsw
Part number	Input Voltage	Sec	Aux	Power	Fsw
FCT1-33K2SL_	9 V — 18 V	3.3 V , 1.2 A	10 V , 0.02 A	4 W	250 kHz
FCT1-50K2SL_	9 V — 18 V	5 V , 0.8 A	10 V , 0.02 A	4 W	250 kHz
FCT1-90K2SL_	9 V — 18 V	9 V , 0.44 A	10 V , 0.02 A	4 W	250 kHz
FCT1-120K2SL_	9 V — 18 V	12 V , 0.33 A	10 V , 0.02 A	4 W	250 kHz
FCT1-150K2SL_	9 V — 18 V	15 V , 0.27 A	10 V , 0.02 A	4 W	250 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance typ (µH) 3	DCR max (mΩ) 4			Leakage Inductance max (µH) 5	Turns Ratio 6	Isolation Voltage (Vrms) 7
Part number 2 (Hover for schematics)	Inductance typ (µH) 3	Pri	Sec	Aux	Leakage Inductance max (µH) 5	Pri : Sec : Aux	Isolation Voltage (Vrms) 7
FCT1-33K2SL_	120	48	53	720	0.195	1 : 1 : 2.8	1500
FCT1-50K2SL_	120	48	88	735	0.205	1 : 1.4 : 2.8	1500
FCT1-90K2SL_	120	48	218	745	0.165	1 : 2.3 : 2.8	1500
FCT1-120K2SL_	120	48	420	705	0.170	1 : 3 : 2.8	1500
FCT1-150K2SL_	120	48	532	732	0.215	1 : 3.7 : 2.8	1500

Notes

Output is with the secondary windings connected in parallel. Auxiliary winding output is 10 V, 20 mA.
When ordering, please specify packaging code: e.g. FCT1-150K2SLD
Inductance is measured at 250 kHz, 0.2 Vrms, 0 Adc.
DCR for the secondary is measured with the windings connected in parallel.
Leakage inductance is for the primary and is measured with the secondary shorted.
Turns ratio is with the secondary windings connected in parallel.
1500 Vrms primary to secondary isolation.

Termination:

RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

Packaging:

D = 13″ machine ready reel. EIA-481 embossed plastic tape (350 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. To simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +85°C

Storage temperature range:

Component: –40°C to +85°C
Tape and reel packaging: –40°C to +80°C

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Schematics

Secondary winding 7 – 6 not used on
FCT1-120K2SL and FCT1-150K2SL.
For other parts, secondary windings
to be connected in parallel on PC board.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
350	330	100	13	38,4	32,4	32	20	4	2	9,16	0,42

General specification

Core Material:

Ferrite

Weight:

2.0 – 2.1g

Packaging:

350 per 13″ reel Plastic tape: 32 mm wide, 0.42 mm thick, 20 mm pocket spacing, 9.16 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested with pure water or alcohol only. More info.

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FCT1-xxK2SL Forward Converter Transformers

for 4 Watt Applications

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Warning