Document 376
SMT Power Transformer
The A9967-AL surface mount transformer works with
with Linear Technology LT1725 Isolated Flyback Con-
troller. It is ideal for use in telecommunications isolated
converters and isolated power supplies, and can be
used in PoE applications.
This low-profile transformer is designed for an input
voltage of 36 – 72 Volts. It features six 1-to-1 windings
and 500 Vrms isolation between windings.
Inductance
at 0 A
2
±10% (µH)
10.0
Inductance
at
Ipk
3
min (µH)
9.0
For Linear Technology
LT1725 Flyback Controller
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.
Coilcraft can also custom engineer a transformer to
meet your specific requirements. For free evaluation
samples, contact Coilcraft or visit
www.coilcraft.com.
Leakage
inductance
5
max (µH)
0.200
Part
number
1
A9967-AL_
DCR
(Ohms)
0.045
max
4
Ipk
3
(A)
7.0
Output
15 V, 2 A
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.
1.148 max
29,15
1
12
2. Inductance is per winding of the primary, measured at 100 kHz,
0.1 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. DCR is per winding.
5. Leakage inductance is for one winding and is measured with all other
windings shorted.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.810 max
20,57
6
A9967-AL
7
0.450 max
11,43
0.084
2,13
0.969
24,6
0.827
21,0
6
0.004 /0,10
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 +85°C
Storage temperature
Component: –40°C to +125°C.
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
Only pure water or alcohol recommended
0.130
3,30
1
0.028
7
0,72
0.93
23,62
0.05
1,27
3
6
Recommended
Land Pattern
1
12
10
4
7
1
0.118
3,0
0.118
3,0
Dimensions are in
inches
mm
9
5
12
2
8
1:1:1:1:1:1
11
Specifications subject to change without notice.
Please check our website for latest information.
Document 376
Revised 04/20/05
© Coilcraft, Inc. 2009
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