
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© 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.
PoE Transformer
Document 423
Document 423 Revised 12/21/11
For National Semiconductor
LM5070 PoE Interface
1. When ordering, please specify a packaging code:
C1023-ALD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape (175 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 for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc.
3. Ipk is the peak current drawn at minimum input voltage.
• Developed for the NSC LM5070 PD Interface in 13 W applications.
• Operates at frequencies up to 1 MHz
• Input: 36
–
72 V; Output: 3.3 V, 4.5 A, with secondary windings
connected in parallel
• Isolation:1500 Vrms from the primary and auxiliary windings
to the secondary.
6
3
4
1
Aux
Pri Sec
9
8
7
10
11
0.130
3,30
0.050
1,27
1
0.450
11,43
0.080
2,03
1.181
30,00
0.827
21,00
0.810
20,57
0.969
24,60
0.930
23,62
0.028
0,711
0.118
3,0
0.118
3,0
max
max
max
112
67
Recommended
Land Pattern
0.004 /0,10
C1023-AL
XXXXY
Partsmanufactured prior
to December 2011 may
be markeddifferently.
4. DCR for the secondary is per winding.
5. Leakage inductance is for the primary winding with all other pins
shorted.
6. Turns ratio is with the secondary windings connected in parallel.
7. Capacitance measured between pins 3 and 4 with other pins shorted.
8. Isolation is measured from the primary and aux to the secondary.
9. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Part L at 0 A2 L at Ipk3 DCR max (Ohms)4 Leakage Turns ratio6 Capacitance7 Ipk3 Isolation8
number1 ±10% (µH) ±10% (µH) pri aux sec L (µH)5 pri : sec pri : aux (pF) (A) (Vrms)
C1023-AL_ 110 99.0 0.139 0.656 0.016 1.40 1 : 0.19 1 : 0.69 70 1.5 1500
Secondary windings to be connected
in parallel on PC board.
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 12.4 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)
Mean Time Between Failures (MTBF) / Failures in Time (FIT)
26,315,789 hours / 38 per billion hours, Calculated per Telcordia SR-322
Packaging 175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick,
32 mm pocket spacing, 11.9 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf
Dimensions are in inches
mm