GA3459_15 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformers

Document 722
Flyback Transformers ForLinearTechnologyLT3751
Capacitor Charger Controller
• Flyback transformer for the Linear Technology LT3751
Capacitor Charger Controller for charging capacitors to 500 V
• GA3459-BL: 5 – 24 V input; GA3460-BL: 12 – 24 V input
• 1500 Vrms, one minute isolation from primary to secondary
windings
• Flux shield minimizes EMI emission
Core material Ferrite
Terminations  RoHS tin-silver (96.5/3.5) over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight  24.2 – 27.5 g
Ambient temperature  –40°C to +125°C
Storage temperature  Component: –40°C to +125°C.
Tray 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  24 per tray
PCB washing  Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.

Part
number
GA3459-BL
GA3460-BL
Inductance
  _{at 0 A}1
±10% (µH)
5.0
2.5
In_ dautc_Itpakn₂ce _{DCR max (mOhms)3}
min (µH)
pri    sec
4.25
7.70
515
2.25
5.63
400
Leakage
inductance⁴
Turns ratio^{5  } Ipk²
max (µH)
pri : sec
(A)
0.10
1 : 10
20
0.06
1 : 10
50
1. Inductance is measured at 50 kHz, 0.1 Vrms.
2. Peak primary current drawn at minimum input voltage.
3. DCR for the primary is with the windings connected in parallel.
4. Leakage inductance is for the primary with windings connected in parallel
and with the secondary winding shorted.
1.053
26,75
max
12
12
5. Turns ratios are with the primary windings connected in parallel.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
GA3459-BL
1
Flux
2
shield
3
4
6
Pri
Sec
9
7
1.024
26,0
1.285
32,65
max
1.10 Recommended
28,2
Land Pattern
10
11
12
Dot
indicates
pin 1
1
0.039
1,00
Internal
code
GA34xx-BL
XXXX Y
0.157
4,00
1
0.079
0.108 _2,00
2,75
01.545,01max
Dimensions
0.004 / 0,10
are in
inches
mm
0.157
4,00
GA3460-BL
1
Flux
2
shield
3
4
6
Pri
Sec
12
7
11
10
9
Primary windings to be connected in parallel
on PC board. Connect pin 6 to ground.
Note: The primary windings of these
transformers DO NOT have the same pinouts.
Document 722  Revised 05/15/15