7
TABLE SIMULATION
•
The simulation interface can simulate a custom curve based on a table as described in chapter . A separate application is
available specifically for this mode.
•
With this application it is possible to manage, load and write tables from and to the simulation interface.
•
The application can read ‘csv’ files. To use this feature please use the following format:
o
The columns must be separated by a comma (,).
o
The rows must be separated by a new line.
o
The first row must contain Index, Voltage and Current in that order.
o
The first index must contain zero for either the voltage- or the current settings, where the last index must contain
zero for the opposite.
o
The voltage values can only increment or decrement in value for the whole table.
o
See the following example:
Index, Voltage,
Current
0,
36.96,
0.000
1,
36.95,
0.069
2,
36.93,
0.139
...
...
...
125,
28.00,
8.661
126,
26.50,
8.731
127,
0.00,
8.800
table 3 - 4
8
INTERNAL RESISTANCE SIMULATION
•
The simulation interface can simulate an internal resistance with a maximum value depending on the type of power sup-
ply.
•
The settings for the internal resistance can be configured trough the web interface. Within the interfaces page.
•
The internal resistance simulation is very sensitive to high capacitive loads. A slow setting is available in the web interface
if the simulation is unstable.
•
The internal resistance simulation is a correction of any other programming source. For example you can set the voltage
and current with the front knobs, set an internal resistance value trough the web interface, and the simulation interface au-
tomatically corrects the output voltage.
9
LEADLESS SENSING SIMULATION
•
The simulation interface can automatically compensate for voltage drops over the leads without using sense leads. This
simulation type has three different modes:
o
Calculate resistance: In this mode the resistance of the cable is calculated by means of the materials electrical
resistivity, length and the cross sectional area.
o
Measure voltage drop: In this mode the user must measure the voltage on the output terminals of the power supply,
the voltage on the terminals of the load, and the corresponding current.
o
Measure resistance: In this mode the user must measure the resistance of the leads.
•
All these operating modes are limited by the maximum configurable resistance as specified.
•
The settings for the leadless sensing simulation can be configured trough the web interface. Within the interfaces page.
•
The leadless sensing simulation is a correction on any other programming source. For example you can set the voltage
and current with the front knobs, set a leadless sensing resistance value trough the web interface, and the simulation inter-
face automatically corrects the output voltage.
10
FOLDBACK CURRENT SIMULATION
•
The simulation interface can simulate foldback current limiting behavior to provide a higher level of protection for DUT’s. In
foldback current limiting the power supply will fold back, after being a specified time in constant current mode, to a prede-
fined current setting. Figure 3 - 6 shows an example of this current limit behavior.
•
The foldback current simulation can also be used to simulate a foldforward current limit.
DELTA ELEKTRONIKA BV
SM3300 INTERFACES
Page 3 - 4
March 2014
