■
Fig.4.2
＜
Output voltage decreasing
＞
Fig.4.3
＜
Output voltage increasing
＞
When variable only in one side direction of the output voltage from the rated voltage, please do
the connection shown in Fig.4.2 or Fig.4.3.
The resistance can be calculated by the following equation. In addition, because there is that it
is not a calculated value as in the variations of the internal components, it is recommended that
you adjust the potentiometer.
Output voltage
decreasing
Output voltage
increasing
A-11
TRM
RU
+VOUT
-VOUT
RT
2.7kΩ
Shunt
regulator
Vref
+S
-S
TRM
RD
+VOUT
-VOUT
RT
2.7kΩ
Shunt
regulator
Vref
+S
-S
Ｖ
OD
：Output voltage needed to set up[V]
Ｖ
OR
：Rated output voltage[V]
ＲＴ ：Resistor of TRM[kΩ]
12V : 6.8 [kΩ]
28V : 8.2 [kΩ]
48V : 8.2 [kΩ]
：Reference voltage [V]
Ｖref = 2.495 [V]
Ｖ
ref
Ｖ
OU
：Output voltage needed to set up[V]
Ｖ
OR
：Rated output voltage[V]
ＲＴ ：Resistor of TRM[kΩ]
12V : 6.8 [kΩ]
28V : 8.2 [kΩ]
48V : 8.2 [kΩ]
：Reference voltage [V]
Ｖref = 2.495 [V]
Ｖ
ref
=
2.7
−
− [Ω]
=
ܱܴ
−
=
ܱܦ
−
=
2.7
− 1
− [Ω]
=
ܱܴ
−
=
ܱܷ
−
Applications Manual
TUNS300/500/700
