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Document 299
SMTPlanarTransformer – A0027-AL
Coilcraft’s surface mount planar transformers are ideal for
applications that require high efficiency in a low-profile
package. Planar transformers offer high power densities
along with great reliability and repeatability. The A0027-A
is designed to perform in push-pull topologies operating at
200–300 kHz. The auxiliary winding can be used to control
input current to PWMs.
To complete your design, Coilcraft offers a wide variety of
power inductors for use as input and output chokes.
To request free evaluation samples, contact Coilcraft or
visit www.coilcraft.com.
Part
Output
number power (W)
A0027-AL
10
Input
voltage
range (V)
36 –75
Output
voltage (V)
3.3
Output
current
(A rms)
2.0
Primary
Leakage
inductance1 inductance
min (mH) max (µH)
1.30
3.5
DCR max (Ohms)
pri sec aux
1.13 0.042 0.331
Pri/sec
isolation
(Vrms)
1500
1. When ordering, please specify packaging code:
A0027-ALD
Packaging: D = 13machine ready reel. EIA-481 embossed plastic
tape (250 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. Inductance measured between pins 1 and 3 at 250 kHz, 0.1 Vrms,
0 Adc.
2. Storage and ambient operating temperature range: –40°C to +85°C.
3. Electrical specifications at 25°C.
1
0.870 max
22,10
3
1.320 max
33,53
8
4
0.380 max
9,65
0.080
2,03
7
0.105
2,67
‡
1.115
28,32
0.231
5,87
18
2
7
6
5
34
5
Recommended
Land Pattern
0.334
8,48
0.334
8,48
1
12T
Primary 2
12T
3
8
Auxiliary 6T
4
0.006 /0,15
Weight:
10.0 g
Terminations: Matte tin over nickel over brass
Tape and reel: 250/13reel 56 mm tape width
For packaging data see Tape and Reel Specifications section.
5
2T
6 Secondary
2T
7
© Coilcraft, Inc. 2007
Specifications subject to change without notice.
Please check our website for latest information. Document 299 Revised 06/19/07