1 Connection for Standard Use
¡
To use TUNS series, connection shown in Fig.1.1 and external
components are required.
¡
This product uses conduction cooling method (e.g. heat radiation
from the aluminum base plate to the attached heat sink).
Reference: “Derating”
Heatsink
Load
FG
Co
+
+
R
C1
F1
FG
AC IN
FG
TFR1
CY
C3
C2
+BC
+S
-BC
-S
Cbc
AC1
AC2
+VOUT
-VOUT
Noise
filter
TUNS300F
TUNS500F
TUNS700F
TUNS1200F
Fig.1.1 Connection for standard use
Table 1.1 External components
No. Symbol
Components
Reference
1
F1 Input fuse
2.1 “Wiring input pin (1)”
2
C1 Input Capacitor
2.1 “Wiring input pin (2)”
3
-
Noise Filter
2.1 “Wiring input pin (3)”
4
CY Y capacitor
5
Co Output capacitor
2.2 “Wiring output pin (1)”
6
Cbc Smoothing Capacitor for boost voltage 2.3 “+BC/-BC pins (1)”
7 C2,C3 Capacitor for boost voltage
2.3 “+BC/-BC pins (2)”
8 TFR1 Inrush current protection resistor 2.3 “+BC/-BC pins (3)”
9
-
Heatsink
-
2 Wiring Input/Output Pin
2.1 Wiring input pin
(1) F1 : External fuse
¡
Fuse is not built-in on input side. In order to protect the unit, install
the fuse on input side (as shown in Table 2.1).
Table 2.1 Recommended fuse (Slow-blow type)
Model
TUNS300F TUNS500F/
700F
TUNS1200F
(85 - 264Vin)
TUNS1200F
(85 - 305Vin)
Rated voltage
AC250V
AC300V
Rated current
10A
15A
25A
25A
(2) C1 : External Capacitor for input side
¡
Install a film capacitor as input capacitor C1 of which the capaci-
tance and ripple current capability are above the values shown in
Table 2.2.
¡
Use a safety approved capacitor.
¡
If C1 is not connected, it may cause the failure of the power sup-
ply or external components.
Table 2.2 Input Capacitor C1
No.
Model
Voltage Capacitance Rated ripple
current
1
TUNS300F
AC250V
2μF or more 5A or more
2
TUNS500F
2μF or more 5A or more
3
TUNS700F
3μF or more 5A or more
4
TUNS1200F
(85 to 264Vin)
3μF or more 5A or more
5
TUNS1200F
(85 to 305Vin)
AC300V 3μF or more 5A or more
(3) CY : Noise filter/Decoupling capacitor
¡
The product doesn’t have noise filter internally.
Please connect external noise filter and primary decoupling capaci-
tor CY for low line noise and stable operation of the power supply.
¡
The operation of the power supply may be unstable due to the
resonance of the filter or inductance.
¡
Install a correspondence filter, if it is required to meet a noise
standard or if the surge voltage may be applied to the unit.
¡
Install a primary decoupling capacitor CY, with more than 470pF,
near the input pins (within 50mm from the pins).
¡
When the total capacitance of the primary decoupling capacitor is
more than 8800pF, the nominal value in the specification may not
be met by the Hi-Pot test between input and output. A capacitor
should be installed between output and FG.
2.2 Wiring output pin
(1) Co : Output capacitor
¡
Install an external capacitor Co bVOUT and -VOUT pins
for stable operation of the power supply.
Recommended capacitance of Co is shown in Table 2.3.
¡
Select the high frequency type capacitor. Output ripple and start-
up waveform may be influenced by ESR-ESL of the capacitor and
the wiring impedance.
¡
Install a capacitor Co near the output pins (within 50mm from the
pins).
¡
When the power supply is used under 0
C
ambient temperature,
output ripple voltage increases. In this case, connect 3 capacitors
Co in parallel connection.
Table 2.3 Recommended capacitance Co[μF]
Model
Temperature of base plate
Tc=0 to +100
C
Tc=-40 to +100
C
Output voltage
(V)
TUNS300F/TUNS500F
TUNS700F/TUNS1200F
TUNS300F/TUNS500F
TUNS700F/TUNS1200F
12
2200
2200×3parallel
28
1000
1000×3parallel
48
470
470×3parallel
¡
The specified ripple and ripple noise are measured by the method
introduced in Fig.2.1.
AC-DC Power Supplies Bus Converter.Power Module Type TUNS300F, TUNS500F, TUNS700F, TUNS1200F
Instruction Manual
TUNS-23
July 27, 2020
