GA3429_13 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformer

Document 733
Flyback Transformer ForLinearTechnologyLT3573
Isolated Flyback Converter
• Designed for the LT3573 Isolated Flyback Converter
• 1500 Vrms isolation from primary and bias to secondary;
500 Vrms isolation from primary to bias, tested for one minute
• The bias winding provides power to the chipset
Core material Ferrite
Terminations  RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight  3.9 to 4.1 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  250 per 13″ reel  Plastic tape:  32 mm wide, 0.5 mm thick,
20 mm pocket spacing, 11.2 mm pocket depth
PCB washing  Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf

Inductance
Part
  ^{at 0 A2}
  _number1 _{±10% (µH)}
GA3429-BL_ 24.0
Ind_{  autcI}tpakn₃c e   D^  _{C R max (mOhm s)4 inLdeuacktaagnec e   Turn s ratio6   Ipk3 vIonlptaugte}
min (µH) pri sec bias max (µH)⁵ pri : sec : bias (A) (V)
21.6
95 7.5 123
0.566
4:1:1
2.1 20 – 28
  _Output7
3.3 V,  1.5 A
1. When ordering, please specify packaging code:
GA3429-BLD
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (250 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, 0.3 Vrms, 0 Adc.
3. Ipk is peak primary current drawn at minimum input voltage.
4. DCR for the secondary is per winding.
5. Leakage inductance measured between pins 3 and 4 with all secondary
pins shorted.
6. Turns ratio is with the secondary windings connected in parallel.
7. Output is with the secondary windings connected in parallel. Bias winding
output: 3.3 V, 20 mA .
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
6
3
5
Pri
Sec
4
7
2
8
Bias
1
Secondary windings to be connected
in parallel on PC board
0.433
11,00
max
0.041
1,05
01.56,0204max
0.004 /0,10
Dot above pin1
1
0.50 _max
12,7
4
0.413
10,50
Dimensions are in
inches
mm
0.024
0,60
8
5
0.098
2,50
0.080
2,03
0.460
11,68
0.050
1,27
1
Recommended ^0.098
Land Pattern ^2,50
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 733  Revised 05/04/09
© 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.