2 Wiring Input/Output Pin
1 Connection for
Standard Use
¡
In order to use the power supply, it is necessary to wire as shown
in Fig.1.1 and external components in table1.1.
¡
Short the following pins to turn on the power supply.
-VIN RC1, +VOUT +S, -VOUT -S
Reference: 3.5 ”Remote ON/OFF”
3.6 ”Remote sensing”
¡
The DBS Series handles only the DC input.
Avoid applying AC input directly.
It will damage the power supply.
¡
Operate with the conduction cooling(e.g. heat radiation from the
aluminum base plate to the attached heat sink).
Reference ”Derating”
+
Heatsink
o
C
Cin
FG
RC1
-S
+VOUT
-VOUT
-VIN
+VIN
+S
Y
C
Load
F1
DC
input
Noise
filter
Fig.1.1 Connection for standard use
Table 1.1 External components
No. Symbol
component
Reference
1
F1
Input fuse
2.1 (1) ”External fuse”
2
C
Y
Primary decoupling capacitor 2.1 (2) ”Noise filter/
Decoupling capacitor”
3
x
Noise filter
4
Cin
External capacitor on the input side 2.1 (3) ”External capacitor on the input side”
5
Co
External capacitor on the output side 2.2 ”Wiring output pin”
6
x
Heatsink
”Derating”
2.1 Wiring input pin
(1) External fuse
¡
Fuse is not built-in on input side. In order to protect the unit, install
the normal blow type fuse on input side.
¡
When the input voltage from a front end unit is supplied to multiple
units, install the normal blow type fuse in each unit.
Table 2.1 Recommended fuse(Normal-blow type)
Model
DBS100A / 150A DBS200B DBS400B DBS700B
Rated current
5A
3A
5A
10A
(2) Noise filter/Decoupling capacitor
¡
Install an external noise filter and a decoupling capacitor C
Y
for
low line-noise and for stable operation of the power supply.
¡
Install a correspondence filter, if a noise standard meeting is re-
quired or if the surge voltage may be applied to the unit.
¡
Install a primary decoupling capacitor C
Y
, 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.
In this case, it is that a capacitor should be installed between out-
put and FG.
(3) External capacitor on the input side
¡
Install an external capacitor Cin bVIN and -VIN input pins
for low line-noise and for stable operation of the power supply.
DBS100A / 150A:more than 47μF
DBS200B:more than 0.1μF
DBS400B / 700B:more than 0.33μF
¡
When the line impedance is high or the input voltage rise quickly
at start-up(less than 10μs), install a capacitor Cin bVIN
and -VIN input pins(within 50mm from pins).
DBS200B:more than 22μF
DBS400B / 700B:more than 47μF
(4) Input voltage rang/Input current range
¡
The specification of input ripple voltage is shown as below.
Ripple voltage DBS100A / 150A:less than 10Vp-p
DBS200B / 400B / 700B:less than 20Vp-p
¡
Make sure that the voltage fluctuation, including the ripple voltage,
will not exceed the input voltage range.
¡
Use a front end unit with enough power, considering the start-up
current Ip of this unit.
t
Ripple
voltage
time
Input voltage [V]
Input voltage range
Fig.2.1 Input voltage ripple
DC-DC Converters Bus Converter
-
Power Module Type
Instruction Manual
DBS-13
June 26, 2020
