DA2420-AL

Document 544
PoE Transformers
For ST Microelectronics
STE12PS PSE Power Controller
These surface mount flyback transformers were developed specifically for the ST Microelectronics STE12PS
12-Channel PSE Power Control Device.
They are designed to work with a 3.3 V input to provide a
12 V output. Isolation is 500 Vdc from each primary winding to the secondary winding.
Coilcraft can also design custom transformers with voltage, inductance and DCR values to meet your specific
requirements.
For free evaluation samples, contact Coilcraft or order
them on-line at www.coilcraft.com.
Part L at 0 A2
number1 ±10% (µH)
DA2420-AL_
330
DA2421-AL_
330
at Ipk3 DCR max (Ohms)
min (µH)
1-5
2-6
12-7
297
0.756 0.886
5.920
297
0.803 0.984 14.145
L
1. When ordering, please specify a packaging code:
DA2420-ALD
Packaging:D =13″ machine ready reel. EIA-481 embossed plastic
tape (175 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.
Dot indicates pin 1
12
1
0.028
0,711
0.130
3,30
Leakage L Turns ratio5 Ipk3
(µH)4pri : sec(A) Output
6.00
1 : 2
2.0
12 V, 100 mA
4.83
1 : 3
2.0
12 V, 100 mA
max
2. Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc.
3.Ipk is the peak current drawn at minimum input voltage.
4. Leakage inductance measured on the primary windings with all secondary pins shorted.
5. Turns ratio is with the primary windings connected in parallel.
6. Operating temperature range –40°C to +125°C.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.930
23,62
1
0.050
1,27
DA242x-AL
0.810
max
20,57
6
7
1.181
max
30,00
0.118
3,0
Pri
12
Sec
6
5
Recommended
Land Pattern
XXXX Y
1
2
0.118
3,00
7
Primary windings to be
connected in parallel on
the PC board.
0.450
max
11,43
0.080
2,03
0.827
21,00
0.969
24,60
0.004 /0,10
Weight 14.1 – 14.6 g
Terminations Tin-silver over tin over nickel over phos bronze
Tape and reel 175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick,
32 mm pocket spacing, 11.p mm pocket depth
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 544 Revised 12/14/11
© 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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