GW Instek PSW-Series User Manual - Manual (Page 26)

PSW Series User Manual
26
(V
SET
), the load resistance (R
L
) and the critical
resistance (R
C
). The critical resistance is
determined by V
SET
/I
SET
. The power supply
will operate in CV mode when the load
resistance is greater than the critical resistance.
This means that the voltage output will be
equal to the V
SET
voltage but the current will be
less than I
SET
. If the load resistance is reduced
to the point that the current output reaches the
I
SET
level, the power supply switches to CC
mode.
Conversely the power supply will operate in
CC mode when the load resistance is less than
the critical resistance. In CC mode the current
output is equal to I
SET
and the voltage output is
less than V
SET
.
R
L=
R
C
R
L C
V SET
I SET
CV
CC
V
I
R
L
>R
C
Crossover
point