HA3994_13 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformer

Document 736
Flyback Transformer ForLinearTechnologyLT3751
Capacitor Charger Controller
• Flyback transformer for the LinearTechnology LT3751 Capacitor
Charger Controller
• 5 – 24 V input; 5 V, 3.6 A and ±15 V, 1.2A outputs
• 1500 Vrms, one minute isolation from primary to secondary
windings
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  25.0 g
Ambient temperature  –40°C to +85°C
Storage temperature  Component: –40°C to +85°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
Inductance
  _{at 0 A}1
±10% (µH)
HA3994-AL 7.50
In_ dautc_Itpakn₂ce D _{CR max (Ohms)3}
Leakage Volt-time
inductance⁴
Turns ratio^{5  } Ipk² product
min (µH) pri  sec 1  sec 2  sec 3 max (µH) pri : sec 1 : sec 2 : sec 3 (A) typ (V µsec)
6.75 0.018 0.020 0.031 0.031
0.22
1 : 0.5 : 1.5 : 1.5
5.0  37.5
1. Inductance is measured at 100 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 both windings of the primary with the second-
ary windings shorted.
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.
1
0.039
1,00
0.148
3,75
0.551
14,0
max
Dot indicates pin 1
0.108
2,75
12
1
1.10
28,2
12
1.053 _max 0.148
26,75
3,75
0.079
2,00
Parts manufactured prior
to December 2011 may
be marked differently.
Recommended
Land Pattern
1
2
Pri
5 – 24 V
11
12
4
Sec 1
5 V, 3.6 A
9
5
Sec 2
15 V, 1.2 A
8
6
Sec 3
–15 V, 1.2 A
7
Primary windings to be connected
in parallel on PC board.
1.024
26,0
1.35 _max
34,29
0.004 / 0,10
Dimensions
are in
inches
mm
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 736  Revised 12/15/11
© 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.