Document 1227-1
For Linear LT3999
Push-Pull DC/DC Driver
Push-Pull Transformers
• Developed for Linear LT3999 Low Noise, 1 A, 1 MHz Push-Pull
DC/DC Driver with Duty Cycle Control
• 500Vrms, one minute isolation primary windings to secondary
windings
Core material Ferrite
Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos
bronze.
Weight PA6381-AL, PA6383-AL: 1.9 – 2.1 g; PA6384-AL: 3.8 – 4.0 g
Ambient temperature –40°C to +85°C
Maximum part temperature +125°C (ambient + temp rise)
Storage temperature Component: –40°C to +125°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 See dimensional drawings
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Primary
Leakage
inductance3
max (µH)
inductance (µH)2
DCR max (Ohms)4
Part
Input
Turns ratio5
pri:sec
number1 voltage (V)
min
max
pri
sec
Output
PA6381-AL_
PA6383-AL_
PA6384-AL_
5.0
5.0
12
139
29.7
82.5
232
49.5
137.5
0.52
0.19
0.336
0.166 (A); 0.201 (B)
0.035 (A); 0.045 (B)
0.048 (A); 0.061 (B)
1.78
0.067
0.072
1:3.46
1:1.5
1:1.4
12 V, 0.83 A
5 V, 1.0 A
12 V, 0.83 A
1. When ordering, specify a packaging code:
PA6384-ALD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape.
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 Pri A measured on an Agilent/HP 4284 at 100 kHz,
0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 1 and 4 at 100 kHz, 0.1Vrms,
0 Adc with pins 2 and 3 connected and with secondary pins shorted.
4. DCR for the scondary is for each winding.
5. Turns ratio is with the primary windings and secondary windings connected
in series.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document 1227-1 Revised 03/17/15
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© Coilcraft Inc. 2016
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.