Co
+
Co
+
R1
R2
Co
+
VR1
VB
-VOUT
CB
TRM
+VOUT
+S
-S
VB
-VOUT
CB
TRM
+VOUT
+S
-S
VB
-VOUT
CB
TRM
+VOUT
+S
-S
Load
The output voltage rises
when VR1 is adjusted
for the resistance
between
1
and
2
to
lower.
Fig.4.2 Examples of parallel operation
¡
When output voltage adjustment is not in use. TRM wiring, R1, R2
and VR are not necessary.
¡
Thick wire should be used for wiring between the power supply
and load, and line drop should be less than 0.3V.
¡
When the output-line impedance is high, the power supply is be-
come unstable.
Use same length and thickness(width) wire(pattern) for the current
balance improvement.
¡
Connect each input pin for the lowest possible impedance.
¡
When the number of the units in parallel operation increases, input
current increases. Adequate wiring design for input circuitry such
as circuit pattern, wiring and current for equipment is required.
¡
Connect the sensing line and the power line by one point after
connecting each power supply’s sensing pins(+S, -S). In multiple
operation, sensing wires should be connected between each units
for the muster connection to a load.
¡
Output current should be 10% or more of the total of the rated
output current in parallel operation. If less than 10%, the IOG sig-
nal might become unstable, and output voltage slightly increasing
(max5%).
¡
IOG signal might be unstable for one second when the units are
turned on in parallel operation.
4.3 N+1 redundant operation
¡
It is possible to set N+1 redundant operation for improving reliabil-
ity of power supply system.
¡
Purpose of redundant operation is to ensure stable operation in
the event of single power supply failure.
Since extra power supply is reserved for the failure condition, so
total power of redundant operation is equal to N-1.
¡
Clean the product with a brush. Prevent liquid from getting into the
product.
Do not soak the product into liquid.
¡
Do not stick solvent to a name plate or a resin case.
(If solvent sticks to a name plate or a resin case, it will cause
to change the color of the case or to fade letters on name plate
away.)
¡
After cleaning, dry them enough.
5 Cleaning
DC-DC Converters Bus Converter
-
Power Module Type
Instruction Manual
DBS-18
June 26, 2020
