v 20150930 2
C 40000 40000 0 0 0 title-A4.sym
C 45100 45000 1 0 0 npn-3.sym
{
T 46000 45500 5 10 0 0 0 0 1
device=NPN_TRANSISTOR
T 44800 45200 5 10 1 1 0 0 1
refdes=Q802
T 44800 45000 5 10 1 1 0 0 1
value=BUX98A
}
C 46400 45000 1 0 0 npn-3.sym
{
T 47300 45500 5 10 0 0 0 0 1
device=NPN_TRANSISTOR
T 46100 45200 5 10 1 1 0 0 1
refdes=Q803
T 46100 45000 5 10 1 1 0 0 1
value=BUX98A
}
C 43400 46200 1 0 0 npn-3.sym
{
T 44300 46700 5 10 0 0 0 0 1
device=NPN_TRANSISTOR
T 44300 46900 5 10 1 1 0 0 1
refdes=Q801
T 44100 47100 5 10 1 1 0 0 1
value=BUV48A
}
C 44600 44300 1 90 0 resistor-2.sym
{
T 44250 44700 5 10 0 0 90 0 1
device=RESISTOR
T 44300 45000 5 10 1 1 180 0 1
refdes=R802
T 44300 44800 5 10 1 1 180 0 1
value=100
T 44300 44600 5 10 1 1 180 0 1
comment=3W
}
C 42300 45000 1 90 0 resistor-2.sym
{
T 41950 45400 5 10 0 0 90 0 1
device=RESISTOR
T 42000 45600 5 10 1 1 180 0 1
refdes=R801
T 42000 45400 5 10 1 1 180 0 1
value=100
}
C 49400 45100 1 270 1 capacitor-1.sym
{
T 50100 45300 5 10 0 0 90 2 1
device=CAPACITOR
T 49900 45700 5 10 1 1 0 0 1
refdes=C801
T 50300 45300 5 10 0 0 90 2 1
symversion=0.1
T 49900 45500 5 10 1 1 0 0 1
value=0.022uF
T 49900 45300 5 10 1 1 0 0 1
comment=400VAC
}
C 48000 47400 1 0 0 diode-1.sym
{
T 48400 48000 5 10 0 0 0 0 1
device=DIODE
T 48200 47200 5 10 1 1 0 0 1
refdes=D803
T 48100 47000 5 10 1 1 0 0 1
value=RGP30M
}
C 43000 45700 1 90 0 diode-1.sym
{
T 42400 46100 5 10 0 0 270 8 1
device=DIODE
T 43500 46300 5 10 1 1 180 0 1
refdes=D801
T 43700 46100 5 10 1 1 180 0 1
value=1N4934
}
C 43900 45300 1 0 1 diode-1.sym
{
T 43500 45900 5 10 0 0 0 6 1
device=DIODE
T 43200 45200 5 10 1 1 180 6 1
refdes=D802
T 43100 45000 5 10 1 1 180 6 1
value=1N4934
}
C 47500 44900 1 270 1 diode-1.sym
{
T 48100 45300 5 10 0 0 90 2 1
device=DIODE
T 48000 45300 5 10 1 1 180 6 1
refdes=D807
T 47800 45000 5 10 1 1 0 0 1
value=ITT EM5??
}
N 47700 45800 47700 47600 4
N 44000 47200 44000 47600 4
N 45700 46000 45700 47600 4
N 47000 46000 47000 47600 4
N 45700 45000 45700 44100 4
N 47000 44100 47000 45000 4
N 43900 45500 45100 45500 4
N 44800 45500 44800 46300 4
N 44800 46300 46400 46300 4
N 46400 46300 46400 45500 4
N 44000 46200 44000 45500 4
C 40800 44000 1 0 0 input-1.sym
{
T 40800 44300 5 10 0 0 0 0 1
device=INPUT
T 40500 44000 5 10 1 1 0 0 1
refdes=KE
}
C 40800 45900 1 0 0 input-1.sym
{
T 40800 46200 5 10 0 0 0 0 1
device=INPUT
T 40500 45900 5 10 1 1 0 0 1
refdes=KB
}
C 48900 45700 1 270 1 varistor-1.sym
{
T 49700 45800 5 10 0 0 90 2 1
device=MOV
T 50100 46000 5 10 0 0 90 2 1
footprint=MOV
T 50550 46000 5 10 0 0 90 2 1
device=VARISTOR
T 48900 46400 5 10 1 1 180 0 1
refdes=R804
T 48900 46200 5 10 1 1 180 0 1
netname=S20K460
}
N 49900 47600 48900 47600 4
N 41600 44100 50000 44100 4
C 42400 44100 1 90 0 zener-1.sym
{
T 41800 44500 5 10 0 0 90 0 1
device=ZENER_DIODE
T 41900 44700 5 10 1 1 180 0 1
refdes=D806
T 41600 44400 5 10 1 1 0 0 1
value=???
}
N 42200 46700 43400 46700 4
N 41600 47600 48000 47600 4
N 44500 45200 44500 45500 4
N 47700 44100 47700 44900 4
N 49600 46000 49600 47600 4
N 49100 46600 49100 47600 4
N 42200 45900 42200 46700 4
C 40800 47500 1 0 0 input-1.sym
{
T 40800 47800 5 10 0 0 0 0 1
device=INPUT
T 40500 47300 5 10 1 1 0 0 1
refdes=Heat Sink
}
N 44500 44300 44500 44100 4
N 49600 45100 49600 44100 4
N 49100 45700 49100 44100 4
N 42800 46700 42800 46600 4
N 42800 45700 42800 45500 4
N 42800 45500 43000 45500 4
N 41600 46000 42200 46000 4
C 49900 47500 1 0 0 output-1.sym
{
T 50000 47800 5 10 0 0 0 0 1
device=OUTPUT
T 50800 47500 5 10 1 1 0 0 1
refdes=KA
}
T 45400 40900 9 18 1 0 0 0 1
Mystery PCB - 
T 44700 40400 9 10 1 0 0 0 1
mystery-pcb-???.sch
T 44900 40100 9 10 1 0 0 0 1
1
T 46700 40100 9 10 1 0 0 0 1
1
T 48600 40100 9 10 1 0 0 0 1
MSWaters
T 48500 40400 9 10 1 0 0 0 1
2016 - 03 - 30
T 40600 42400 9 10 1 0 0 0 4
This is the schematic for a mystery PCB I have amongst my "stuff". The circuit has been reverse engineered.
It looks like its part of an inductive-boost converter. An inductance is connected between a DC source and the
Heat Sink input. The BUX98A NPN transistors are rated at 30 Amp average Ic (60 Amp peak, < 5 msec) each
and the RGP30M diode is rated at 3 Amp average If (125 Amp peak, < 8.3 msec).