MA5281_14 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformer

Document 1053
Flyback Transformer ForTITPS23756
15 W PoE Converter
• Flyback for Texas Instruments TPS23756 Wide Input Range
15 W PoE Converter; shown on PMP6659 schematic and BOM
• Input: 10.8 – 57 V
• 1500 Vrms, one minute 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  11.3 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 13″ reel  Plastic tape: 44 mm wide,
0.4 mm thick, 28 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 A}2
±10%
  _{L amt iInp k}3 _{  DCR}
max
(Ohms)⁴
Leakage L^{5 Turns ratio6 } _ 
  _number1 _{(µH) (µH) pri}   _{sec bias drive max (µH) pri : sec pri : bias pri : drive}
MA5281-BL_ 45
40.5 0.060 0.058 0.370 0.323 0.550 1 : 0.57 1 : 0.57 1 : 0.52
  _Ipk3
(A)
2.8
Output⁷
12 V, 1.25 A
1. When ordering, please specify a packaging code:
MA5281-BLD
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, 0.1 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. DCR for the primary and the secondary is measured with windings
connected in parallel.
5. Leakage inductance is for the primary, measured with the windings
connected in parallel and the secondary windings shorted.
6. Turns ratio is with the primary windings and secondary windings con-
nected in parallel.
7. Output is with the secondary windings connected in parallel. Output of the
drive winding is 11 V, 15 mA. Output of the bias winding is 11.5 V, 15 mA.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
0.028
0,70
0.118
3,00
0.425 _max
10,80
Dot indicates pin 1
12
0.118
3,00
0.810 _max
20,57
0.050
1,27
0.827
21,0
0.130
3,3
1
12
Recommended
Land Pattern
0.930
23,62
0.969
24,6
13.01,8010max
0.004 / 0,10
Dimensions
are in
inches
mm
3
12
4
11
Pri
Sec
6
9
5
10
1
8
Bias
Drive
2
7
Primary windings and secondary
windings to be connected in parallel
on PC board
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 1053  Revised 05/01/13
© Coilcraft Inc. 2014
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.