UM0377
User manual
VIPer
®
design software help
Introduction
This software offers a straightforward step-by-step procedure for designing a non-isolated
single output power supply with the VIPer12A-E or VIPer22A-E.
The topologies are:
●
●
buck for positive output voltage;
buck-boost for negative output voltage.
Schematic window
Buck topology
Buck-boost topology
March 2007
Rev 2
1/11
www.st.com
Contents
UM0377
Contents
1
Output voltage selection - step 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
VIPer selection - step 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
AC/DC input - step 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Output inductance selection - step 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Project result - step 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
7
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/11
UM0377
Output voltage selection - step 1
1
Output voltage selection - step 1
Figure 1.
Output voltage window
STMicroelectronics
1.1
Operations
In the output voltage window the user must set:
●
●
●
output voltage
output current
output voltage ripple.
The results are the needed capacitance value and equivalent series resistance (ESR) of the
output capacitor.
3/11
VIPer selection - step 2
UM0377
2
VIPer selection - step 2
Figure 2.
VIPer setting window
STMicroelectronics
2.1
Operations
1.
2.
3.
4.
Device selection: the software automatically selects the device based on the output
power.
Operating mode: discontinuous mode is set by default but the user can change it to
continuous.
Maximum ambient temperature: has an impact on power dissipation, thus on the
converter's power capability.
Case-ambient thermal resistance: the default value can be decreased and power
dissipation improved by providing a heat sink.
4/11
UM0377
AC/DC input - step 3
3
AC/DC input - step 3
Figure 3.
Input voltage window
3.1
Operations
1.
Input voltage range selection:
–
–
–
2.
3.
4.
110 V range
230 V range
Full range
Input ripple selection
Hold-up cycles selection
Line frequency selection: 50 or 60 Hz
5/11
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