Coilcraft GA3372-AL Flyback transformer Datasheet

Document 655
Flyback Transformer
For National Semiconductor LM5015
Two-Switch DC-DC Regulator
• Referenced on NSC application notes AN-1724 and AN-1725
• Designed to operate at 250 kHz in continuous conduction
mode with 36 – 72 Volts input
• 1500 Vrms isolation from the primary and auxiliary to the
secondary
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 6.0 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°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: 32 mm wide,
0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth
PCB washing Only pure water or alcohol recommended
Inductance Inductance
DCR max (Ohms)4
Part
Power
at 0 A2
at Ipk3
1
number
(W)
±10% (µH)
min (µH)
pri
sec
aux
GA3372-AL_
13
102.0
91.8
0.185 0.0175 0.270
Leakage
Turns ratio6
inductance5
max (µH)
pri : sec pri : aux
0.780
1 : 0.25 1 : 0.50
Ipk3
(A)
1.2
Output7
5 V, 2.6 A
1. When ordering, please specify packaging code:
GA3372-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 measured at 250 kHz, 0.7 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. DCR for the secondary is with windings connected in parallel.
5. Leakage inductance is for the primary and is measured with the secondary shorted.
6. Turns ratio is with the secondary windings connected in parallel.
7. Output of the secondary is with the windings connected in parallel. Auxiliary winding
output is 10 V, 20 mA.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
Primary
2
4
10
9
Secondary
7
6
0.080
2,03
0.590
14,99
Dot above pin1
0.500 max
12,70
Secondary windings to be connected in
parallel on PC board
0.512
13,00
1
6
5
Recommended
Land Pattern
0.028
0,70
0.530 max
13,46
1
0.098
2,50
10
0.098
2,50
Dimensions are in
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
0.699 max
17,75
0.050
1,27
Auxiliary
5
0.004 /0,10
0.039
1,00
inches
mm
Document 655
Revised 10/28/08
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