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Document 398
Flyback Transformer For National Semiconductor
LM5020 PWM Controller
Designed to operate up to 1 MHz with 36 –72 V input.
3.3 V, 4.5 A output with secondary windings connected in
parallel. Bias output is 12 V.
Ideal for 13 W, IEEE 802.3af-compliant, PoE applications.
Core material Ferrite
Terminations  RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight  12.8 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:  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
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 : bias (pF) (A) (Vrms)
B0695-AL_ 110
99.0 0.133 0.656 0.019 1.11 1 : 0.23 1 :0.69 110 1.5 1500
1. When ordering, please specify a packaging code:
B0695-ALD
Packaging: D = 13machine 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.
4. DCR for the secondary is per winding.
5. Leakage inductance measured between pins 4 and 6 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 bias to the secondary.
9. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Dot indicates pin 1
1
0.028
0,711
12
0.130
3,30
1
0.930
23,62
0.050
1,27
4
12
11
10
0.810
20,57
max
6
1.181
30,00
max
Recommended
Land Pattern
7
0.118
3,0
Parts manufactured prior
to December 2011 may
be marked differently.
0.118
3,0
Pri Sec
6
1
Bias
9
8
7
3
Secondary windings to be connected
in parallel on PC board.
0.450
11,43
max
0.080
2,03
0.827
21,00
0.969
24,60
0.004 /0,10
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 398  Revised 12/19/11
© 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.