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Document 984
Flyback Transformer ForTITPS23752
POE PD controller
• Developed for Texas Instruments green mode TPS23752 POE
PD controller
• 1500 Vrms, one minute isolation (hipot) primary and bias to
secondary; 500 Vrms, one minute isolation primary to bias;
750 Vrms all pins to the core.
Core material Ferrite
Terminations  RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight  11.7 g
Ambient temperature  –40°C to +125°C
Storage temperature  Component: –40°C to +125°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, 0.5 mm thick,
32 mm pocket spacing, 12.0 mm pocket depth
PCB washing  Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Part
Indautc 0t aAn2c e DCR max (Ohms)4
Leakage
inductance5
number1 ±10% (µH) pri   sec   bias max (µH)
JA4456-DL_ 70 0.07 0.0043 0.310 0.615
Capacitance6
Turns ratios7Ipk3
max (pF) pri : sec  pri : bias (A)
158 1 : 0.182 1 : 0.409 3.3
Output8
5 V, 5 A
1. When ordering, please specify termination and packaging codes:
JA4456-DLD
1
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 = 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.
6
2. Inductance is for the primary, measured at 250 kHz, 0.5 Vrms.
3. Peak primary current drawn at minimum input voltage.
4. DCR for the primary and secondary are with the windings connected in parallel.
5. Leakage inductance is for the primary windings with all the secondary windings shorted.
6 Capacitance is for the primary, measured at 250 kHz, 0.5 Vrms with all secondary pins shorted.
7. Turns ratios are with the primary windings and secondary windings connected in parallel.
8. Output of the secondary is with all windings connected in parallel. Bias winding output is 12 V, 20 mA.
0.50
12,7
max
9. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
7
18
29
Pri Sec
4 10
3 11
12
5
Bias
6
Primary windings and secondary windings
to be connected in parallel on PC board.
0.930
23,62
1
Recommended
Land Pattern
0.130
3,30
Dimensions
are
in
inches
mm
0.050
1,27
6
0.118
3,0
1
Dot indicates pin 1
12
0.810
20,57
max
1.181
30,00
max
7
0.827
21,00
0.969
24,60
0.004 /0,10
0.080
2,03
0.028
7 0,711
12 0.118
3,0
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 984  Revised 5/17/16
© Coilcraft Inc. 2016
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.