GA3291-AL Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Forward Converter Transformer

Document 674
Forward Converter Transformer
For Akros AS1130
PoE Controller
• Developed for Akros Silicon AS1130, 30 W PoE Controller
with Integrated DC-DC Conversion
• Designed for forward topology operating at 350 kHz
• 1500 Vrms isolation from primary to secondary
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 10.7 g
Ambient temperature –40°C to +125°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,
32 mm pocket spacing, 11.9 mm pocket depth
PCB washing Only pure water or alcohol recommended
Part
Inductance²
number¹ min (µH)
GA3291-AL_
152
DCR max (Ohms)³
pri
sec
0.065 0.031
Leakage
Input
inductance⁴ voltage
max (µH) range (V)
0.215
36 – 57
Turns ratio⁵
pri : sec Output
1 : 0.923 12 V, 2.5 A
Input
filter
inductor
DO1608C-103
Output
filter
inductor
MSS1278-683
1. When ordering, please specify a packaging code:
GA3291-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 measured at 300 kHz, 0.6 Vrms, 0 Adc.
3. DCR for the primary is measured from pin 1 to pin 3.
4. Leakage inductance is for the primary (pin 1 to pin 3) and is measured
with the secondary shorted.
5. Turns ratio is based on the entire the primary winding (pin 1 to pin 3).
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
0.028
0,70
0.118
3,00
6
Dot indicates pin 1
0.827
21,0
0.130
3,3
12
0.118
3,00
0.810 _max
20,57
0.069
7
1,75
0.930
23,62
1
12
Recommended
Land Pattern
1
7
Pri 2
Sec
8
3
Primary is pin 1 to pin 3.Terminal 2
is for internal connection only. Do not
connected terminal 2 to ground or
any circuitry.
0.425 _max
10,80
0.969
24,6
1.148
29,15
max
0.004 / 0,10
Dimensions are in
inches
mm
Specifications subject to change without notice.
Please check our website for latest information.
Document 674 Revised 10/28/08
© Coilcraft, Inc. 2009