FCT1-33D3SL Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Forward-Mode Transformers

Document 574 -1
Forward-Mode Transformers For30Watt
Telecommunications
• Designed to meet 30 W PoE objectives of IEEE 802.3at.
• Operates at 250 kHz with 36 – 72 Volts input
• 1500 Vrms isolation, primary and bias to the secondary
• Bias winding output: 12 V; sync winding output: 5 V
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 10.1 – 10.7 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°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: 44 mm wide,
0.4 mm thick, 32 mm pocket spacing, 12.0 mm pocket depth
PCB washing Only pure water or alcohol recommended
Part Inductance²
number¹ min (µH)
FCT1-33D3SL_ 72.9
FCT1-50D3SL_ 72.9
FCT1-120D3SL_ 72.9
FCT1-195D3SL_ 72.9
FCT1-240D3SL_ 72.9
DCR max (mOhms)³
pri sec bias sync
27.5 5.0
27.5 10.0
27.5 28.5
27.5 32.0
27.5 72.5
250 160
250 160
250 160
235 120
235 120
Leakage
inductance⁴
Turns ratio⁵
max (µH) pri : sec pri : bias pri : sync
Recommended
output
Output
inductor⁶
0.425
0.420
0.175
0.235
0.235
1 : 0.33
1 : 0.44
1:1
1 : 1.44
1 : 1.78
1:1
1:1
1:1
1 : 0.88
1 : 0.88
1 : 0.56
1 : 0.56
1 : 0.56
1 : 0.44
1 : 0.44
3.3 V, 9 A SER2013-472
5 V, 6 A SER1360-103
12 V, 2.5 A MSS1278-563
19.5 V, 1.55 A MSS1278-154
24 V, 1.25 A MSS1278-224
1. When ordering, please specify termination and packaging codes:
FCT1-240D3SLD
Termination: L = RoHS tin-silver over tin over nickel over phos bronze.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5)
or S = non-RoHS tin-lead (63/37).
Packaging: D= 13″ machine-ready reel. EIA-481 embossed plastic
tape (175 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 primary and secondary is with the windings connected in
parallel.
4. Leakage inductance is for the primary windings with the secondary
windings shorted.
5. Turns ratio is with the primary windings and the secondary windings
connected in parallel.
6. These inductors are recommended for 30% ripple current. Ripple less
than 30% may require the use of physically larger inductors. Allowing
higher ripple current to make use of smaller inductors may create a risk
of discontinuous output current.
7. Operating temperature range –40°C to +125°C.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
2
Pri
4
3
5
Bias
6
11
12
Sec
10
9
8
Sync
7
The primary windings and the
secondary windings are to be
connected in parallel on the
PC board.
Output
inductor
© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 574-1 Revised 10/28/08