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© Coilcraft Inc. 2012
This product may not be used in medical of high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check out web site for latest information.
Flyback Transformer
Document 655
Document 655 Revised 10/28/08
Inductance Inductance Leakage
Part Power
at 0 A2
at Ipk3 DCR max (Ohms)4 inductance5
Turns ratio6 Ipk3
number1 (W) ±10% (µH) min (µH) pri sec aux max (µH) pri : sec pri : aux (A) Output7
GA3372-AL_ 13 102.0 91.8 0.185 0.0175 0.270 0.780 1 : 0.25 1 : 0.50 1.2 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
4
2
5
Primary
Auxiliary
Secondary
10
6
7
9
Secondary windings to be connected in
parallel on PC board
0.500
12,70
0.530
13,46
0.039
1,00
0.512
13,00
0.699
17,75 max
0.028
0,70
0.098
2,50
max
max
56
110
0.004 /0,10
Dot above pin1
0.080
2,03
1
0.590
14,99
0.050
1,27
0.098
2,50
Recommended
Land Pattern
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.
Tape and reel 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
• ReferencedonNSCapplicationnotesAN‑1724andAN‑1725
• Designed to operate at 250 kHz in continuous conduction
mode with 36 – 72 Volts input
• 1500Vrms,oneminuteisolationfromtheprimaryandauxiliary
to the secondary
For National Semiconductor LM5015
Two-Switch DC-DC Regulator
Dimensions are in inches
mm
