Manual OC32/NG
VPEB
Control your Miniature World
Page 18 of 48
Version 1.0 – December 15
th
, 2017
2017 Leon van Perlo
be at least the voltage level PWR. It
makes sense to incorporate a fuse to
take care of the risk of fire during a short
circuit!
Take into account that rectification and
smoothing will increase the voltage a bit.
In most cases the voltage PWR will be
about 1.1 times the nominal AC voltage
of the transformer.
Fig 9: Rectification and smoothing AC supply
Alternating Current
(transformer)
~
~
+
_
GND
PWR
+
_
3A-T
Control your Miniature World
VPEB
Manual OC32/NG
2017 Leon van Perlo
Version 1.0 – December 15
th
, 2017
Page 31 of 48
•
When installing regular drivers, install source drivers in source-driver sockets only
and install other drivers in sink-driver sockets only
Fig 21: Locating the drivers on the OC32
In the following sections, the different sort of drivers are being explained in more detail. If it
is unclear to you it is not of great concern. Just take the examples of section
6.4. There is
explained which driver you need for specific types of devices.
6.1.1
Sink Drivers 500mA (TBD62083)
This is the default driver delivered with the OC32/NG module. A load is connected between
Vp and the 500mA output. The current flows from the positive voltage (Vp) through your
load to the output and on the OC32 via the Sink Driver to GND/0V.
Each output can provide 500mA but
Take Care: de maximum current per group of 8 outputs is 1A
There is not a real current limitation in the OC32. You have to take care of that yourself or
to be certain you have to put a fuse in between. So it is not possible to load all 8 outputs of
a single group with 500mA each. In the case of more "heavy" loads they have to be spread
over more groups.
6.1.2
Source Drivers 500mA (TBD62783)
With a Source Driver the load is connected between the output and GND/0V. The current
flows from positive voltage (Vp) via the Source Driver on the OC32 to the output of the
OC32 and then via your load to GND/0V.
Sink 0..7
Source 0..7
Sink 16..23
Source 16..23
Sink 8..15
Source 8..15
Sink 24..31
Source 24..31
A
D
M
0
..
7
A
D
M
0
..
7
A
D
M
8
..
1
5
A
D
M
8
..
1
5
A
D
M
1
6
..
2
3
A
D
M
1
6
..
2
3
A
D
M
2
4
..
3
1
A
D
M
2
4
..
3
1
