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SPS5000X Series User Manual
WWW.SIGLENT.COM 36
the constant voltage, the power supply switches to CC mode, and the current limit remains
constant.
When the power supply is operating in constant current mode (CC), the load receives
constant current. Even if the output voltage is changed, the current remains the same. If the
load resistance increases to the current limit (Iset) or greater, the power supply switches to
CV mode. This switching point is called the crossover point, and the local state is displayed
as ALT.
The power supply operates in CV or CC mode, which is determined by the set voltage (Vset),
set current (Iset), load resistance (RL) and critical resistance (Rc, Rc=Vset/Iset). When
RL>Rc, the power supply runs in CV mode. At this time, Vout=Vset, Iout<Iset. If RL
decreases, when Iout=Iset, the power supply switches to CC mode.
On the contrary, when the load resistance is less than the critical resistance, the power
supply operates in CC mode. In CC mode, the output current is equal to Iset and the output
voltage is less than Vset.
CV priority mode CC priority mode
Slew Rate
The slope of CV and CC mode can be selected to limit the voltage and current consumption.
The slope setting is divided into high-speed priority and slope priority. The high-speed priority
mode does not allow setting the slope in CV or CC mode, while the rising and falling slopes
can be set independently in the slope priority mode.
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