A9967-AL

Document 376
SMT Power Transformer
For Linear Technology
LT1725 Flyback Controller
The A9967-AL surface mount transformer works with with
Linear Technology LT1725 Isolated Flyback Controller. It is
ideal for use in telecommunications isolated converters and
isolated power supplies, and can be used in PoE applications.
For the LT1725, 48 V to 15 V converter, three windings
are connected in series for the primary and two windings
are connected in parallel for the secondary output of 15 V,
2 A. The remaining winding provides power to the chipset.
This low-profile transformer is designed for an input voltage of 36 – 72 Volts. It features six 1-to-1 windings and
500 Vrms, one minute isolation between windings.
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit www.coilcraft.com.
Part
number1
Inductance Inductance
Leakage
at 0 A2 DCR max4inductance5
at Ipk3
±10% (µH)
min (µH)
(Ohms)
max (µH)
A9967-AL_
10.0
9.0
0.045
1. When ordering, please specify packaging code:
A9967-ALD
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 per winding of the primary, measured at 100 kHz, 0.1 Vrms,
0 Adc. Inductance of the primary, with three windings connected in series
is 90 µH.
1.148 max
29,15
1
0.810 max
20,57
12
Parts manufactured prior
to December 2011 may
be marked differently.
A9967-AL
XXXXY
6
7
0.450 max
11,43
0.084
2,13
0.004 /0,10
0.969
24,6
0.827
21,0
6
0.200
Dimensions are in
Output6
2.3
15 V, 2 A
Core material Ferrite
Weight: 11.9 g
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
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, 12.0 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
3
0.028
7 0,72
12
inches
mm
(A)
3. Peak primary current (with three windings connected in series) drawn at
minimum input voltage. Peak current per winding is 7.0 A.
4. DCR is per winding.
5. Leakage inductance is for one winding and is measured with all other
windings shorted.
6. Output is with both windings of the secondary connected in parallel.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.130
3,30
0.93
23,62
1
1/3 Primary
0.05
1,27
0.118
3,0
12
11
Secondary
10
4
2
1
1/3 Primary
Recommended
Land Pattern
1
Ipk3
0.118
3,0
9
5
6
1/3 Primary
Bias
8
7
Primary windings to be connected in series
on the PC board. Secondary winding to be
connected in parallel on the PC board.
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 376 Revised 08/06/13
© 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.
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