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SPS5000X Series User Manual
WWW.SIGLENT.COM 35
Theory of Operation
This chapter introduces the function and principles of operating the SPS5000X series power
supply.
Operating Area Description
SPS5000X are DC switching power supplies with high voltage and current output. All models
have continuous voltage (CV) and continuous current (CC) output control modes with
working ranges limited only by the output power. The working area is determined by the
rated output power and the rated voltage and current.
When the total output power of the power supply (voltage x current output) is less than the
rated power output, the SPS operates as a typical constant voltage and constant current
power supply.
When the total output power (voltage x current output) is greater than the rated power output,
the effective output is limited to 105% of the rated power. At this time, the output voltage and
current are only related to the load value as shown below:
CC and CV Mode
When the power supply is operating in CV mode, the load receives a constant voltage, and
the current output changes with the load. When the load resistance is too low to maintain
I(A)
V(V)
10
20
30
40
50
60
70
80
5 10 15 20 25 30 35 40
4.5A
24V
9A
12V
I(A)
V(V)
20
40
60
80
100
120
140
160
2.5 7.5 15
2.25A
48V
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