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C1495-AL Datasheet

Flyback Transformers

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Document 445
Flyback Transformers ForNationalSemiconductor
LM5070 PoE Interface – 13 Watt
Flyback transformers for 13 W PoE applications
Designed to operate in continuous mode at 250 kHz with an
input of 36 – 72 Vdc
1500 Vrms isolation from primary and bias to secondary
Core material Ferrite
Terminations  RoHS tin-silver (96.5/3.5) over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight  6.15 g
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  175 per 13reel  Plastic tape:  32 mm wide, 0.5 mm thick,
28 mm pocket spacing, 12.93 mm pocket depth
PCB washing  Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf
Inductance Inductance
Part
number1
±1a0t%0
A2
(µH)
maint
Ipk3
(µH)
D CR ma x (Ohm s)4 inLdeuacktaagnece Turns ratio6
Ipk3
pri bias sec max (µH)5 pri : sec pri : bias (A) Output7
C1495-AL_ 127
114.3
0.255 0.310 0.024 1.25
1 : 0.166 1 : 0.50 1.0 3.3 V, 4.0 A
C1585-AL_ 127
114.3
0.222 0.348 0.039 0.950 1 : 0.25 1 : 0.50 1.0 5.0 V, 2.6 A
C1586-AL_ 127
114.3
0.199 0.308 0.129 0.650 1 : 0.50 1 : 0.50 1.0 12 V, 1.08 A
1. When ordering, please specify packaging code:
C1586-ALD
Packaging: D = 13machine-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.
Dot above pin1
2. Inductance is for the primary, measured at 250 kHz, 0.2 Vrms, 0 Adc.
3. Ipk is peak primary current drawn at minimum input voltage.
4. DCR for the secondary is per winding.
5. Leakage inductance measured between pins 3 and 4 with all other
pins shorted.
6. Turns ratio is with the secondary windings connected in parallel.
7. Output of the secondary is with the windings connected in parallel.
Bias winding output is 12 V, 20 mA.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.500
12,70
max
0.039
1,00
01.76,9795max
0.512
13,00
1
0.530
13,46
max
5
Dimensions
are
in
inches
mm
0.004 /0,10
0.028
0,70
10
0.080
2,03
0.590
14,99
0.050
1,27
0.098
6 2,50
Recommended
Land Pattern
1
0.098
2,50
8
37
Pri Sec
4
2
Bias
9
10
1
Secondary windings to be connected
in parallel on the PC board
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 445  Revised 10/29/08
© 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.


Part Number C1495-AL
Description Flyback Transformers
Maker Coilcraft
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