GA3271-AL Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformer

Document 629
Flyback Transformer ForMaximMAX5941B
PWM Controller
• Flyback transformer for 13 W PoE applications
• Designed to operate with 30 – 60 V input at 275 kHz
• 1500 Vrms isolation from primary to secondary windings
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 5.5 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 200 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick,
28 mm pocket spacing, 9.6 mm pocket depth
PCB washing Only pure water or alcohol recommended
Part
number¹
GA3271-AL_
Power
(W)
13
Inductance Inductance
at 0 A²
at Ipk^{3 DCR max (Ohms)4}
±10% (µH) min (µH) pri sec bias
117.5
104.0 0.201 0.06 0.335
Leakage
inductance⁵
max (µH)
0.815
Turns ratios⁶
pri :sec pri :bias
1 : 0.457 1 : 0.571
Ipk³
(A) Output⁷
1.0 12 V, 1.0 A
1. When ordering, please specify termination and packaging codes:
GA3271-ALD
Termination: L =RoHS tin-silver over tin over nickel over phos bronze.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37).
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic tape (200 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 for the primary, measured at 250 kHz, 0.1 Vrms.
3. Peak primary current drawn at minimum input voltage.
4. DCR for the primary and for the secondary are with the windings connected in parallel.
5. Leakage inductance is for the primary windings with the secondary windings shorted.
6. Turns ratios are with the primary the secondary windings connected in parallel.
7. Output of the secondary is with the windings connected in parallel. Bias winding output is 15 V, 20 mA.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
0.677 _max
17,20
6
1
2
Pri
11
12
10
Bias
8
7
0.004 /0,10
Sec
Recommended
Land Pattern
6
5
0.135
3,43 ₁
0.665
16,88
0.098
2,5
12
6
Dot indicates pin 1
12
GA3271-AL
7
0.865 _max
21,97
0.693
17.60
0.590
14,98
0.340
8,64
max
0.079
2,01
0.028
0,72
7
3
Primary windings and secondary windings
to be connected in parallel on PC board.
0.07
1,79
1
12
0.098
2,5
Specifications subject to change without notice.
Please check our website for latest information.
Document 629 Revised 10/28/08
© Coilcraft, Inc. 2009