¡
The specified ripple and ripple noise are measured by the method
introduced in Fig.3.13.
C1(TUHS25)
SK1
+Vout
+BC
AC1
AC2
-BC
-Vout
F1
R1
Load
Cbc
Co
R
C
Oscilloscope
BW:100MHz
Coaxial Cable
F
50mm
Measuring
board
+
Fig.3.13 Method of Measuring Output Ripple and Ripple noise
¡
When connect the output to FG of an equipment, a noise may be-
come big. The noise can be reduced by connecting external filter
and grounding capacitor on the input side.
C1
+Vout
+BC
AC1
AC2
-BC -Vout
F1
L1
R1
Load
+
Cbc
C11
C12
C13
SK1
Fig.3.14 Recomemended circuit of connect output to FG
4 Function
4.1 Input voltage range
¡
The range is from AC85V to AC264V or DC120V to DC370V
(please see SPECIFICATIONS for details).
¡
In case of less than AC85V or DC120V, it is possible to operate
continuously by input voltage derating as shown Fig.4.1.
¡
In cases that conform with safety standard, input voltage range is
AC100-AC240V (50/60Hz) and DC120-DC370V.
AC50V
DC70V
AC85V
DC120V
AC50V
DC70V
AC85V
DC120V
50
100
40
100
Vi
V
n
in
(a)TUHS3
(b)TUHS5,TUHS10,TUHS15,TUHS25
Load[%]
Load[%]
Fig.4.1 Input voltage derating
(6) D1: Reverse Input Voltage Protection(DC input)
¡
Avoid the reverse polarity input voltage. It cause the power supply
failure. It is possible to protect the unit from the reverse input volt-
age by installing an external diode.
R1
+Vout
-Vout
+BC
AC1
AC2
-BC
Load
F1 D1
+
Cbc
Fig.3.11 Reverse input voltage protection
3.2 Wiring output pin
(1) Co:Output capacitor
¡
In the TUHS series, the output capacitor is basically unnecessary.
Reduce the ripple voltage by connecting the output capacitor.
+Vout
-Vout
Load
Co
Fig.3.12 Connecting Example of an External
Capacitor to the Output Side
¡
Install an external capacitor Co bVOUT and -VOUT pins
for stable operation of the power supply.
Recommended capacitance of Co is shown in Table 3.3.
¡
If output current decreases rapidly, output voltage rises transiently
and the overvoltage protection circuit may operate.
In this case, please install a capacitor Co.
Table 3.3 Recomemended capacitance Co
No. output
voltage TUHS3
TUHS5 TUHS10 TUHS15 TUHS25
1
5V
0 - 100μF 0 - 100μF 0 - 330μF
-
0 - 1000μF
2
12V
0 - 47μF 0 - 47μF 0 - 150μF 0 - 150μF 0 - 470μF
3
15V
0 - 47μF 0 - 47μF 0 - 120μF 0 - 120μF 0 - 390μF
4
24V
0 - 22μF 0 - 22μF 0 - 68μF 0 - 68μF 0 - 220μF
AC-DC Power Supplies PCB Mount Type
Instruction Manual
TUHS-16
