DA2420_13 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – PoE Transformers

Document 544
PoE Transformers For ST Microelectronics
STE12PS PSE Power Controller
These surface mount flyback transformers were devel-
oped 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 wind-
ing to the secondary winding.
Coilcraft can also design custom transformers with volt-
age, 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
  _number1
DA2420-AL_
DA2421-AL_
  _{L at 0 A}2
±10% (µH)
330
330
  _{L at Ipk}3 _{     } 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
Leakage L
  _{max (µH)}4
6.00
4.83
  _{Turns ratio}5
pri : sec
1: 2
1: 3
  _Ipk3
(A)
2.0
2.0
 
Output
12 V, 100 mA
12 V, 100 mA
1. When ordering, please specify a packaging code:
Packaging:
DA2420-ALD
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.
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 second-
ary 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.
Dot indicates pin 1
1
02.08,1507 _max
DA242x-AL
XXXX Y
6
1.181
30,00
max
0.028
12 ^0,711
7 _0.118
3,0
0.130
3,30
1
0.930
23,62
Recommended
Land Pattern
0.050
1,27
0.118
3,00
1
2
12
Pri
Sec
6
7
5
Primary windings to be
connected in parallel on
the PC board.
01.14,5403max
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 [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
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.