VAA Series Instr Manual Datasheet by Cosel USA, Inc.
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CD‘EL \
Basic Characteristics Data
VAA-6
*1 Refer to Instruction Manual
input fuse
Rated
Basic Characteristics Data
Model
VAA10
VAA5
Circuit method
frequency current
100-600
100-500
Flyback converter
Flyback converter
[A]
0.3
0.13
-
-
SwitchingInput
operation availability
*1
*1
Series/Parallel
Parallel
operation
current
Resistor
Resistor
protection
CEM-3
CEM-3
Material
Double
sided
Yes
Yes
sided
Single
*1
*1
Series
operation
PCB/Pattern
Inrush
[kHz]
Basic Characteristics Data
—
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5 Assembling and Installation Method VAA-9
5.1 Installation method VAA-9
5.2 Derating VAA-10
6 Cleaning VAA-10
7 Soldering VAA-10
8 Input/Output Pin VAA-10
9 External Fuse VAA-10
10 Ground VAA-10
11 Others VAA-11
2 Function VAA-8
2.1 Input voltage range VAA-8
2.2 Inrush current limiting VAA-8
2.3 Overcurrent protection VAA-8
2.4 Overvoltage protection VAA-8
2.5 Isolation VAA-8
1 Pin Connection VAA-8
4
Series Operation and Parallel Operation
VAA-9
4.1 Series operation VAA-9
4.2 Redundancy operation VAA-9
3 Wiring to Input/Output Pin VAA-8
AC-DC Power Supplies PCB Mount Type
Instruction Manual
VAA-7
1 Pin Connection
2 Function
Load factor
100
A
Vout
%
Outpnt voltage V
Note: In case of non-linear load, the output is locked out at A point.
: Load characteristics of power supply.
: Characteristics of load (lamp, motor, constant current load, etc.).
Fig.2.1 Current foldback characteristics
2.4 Overvoltage protection
¡Overvoltage protection circuit, clamping the output voltage by
zener diode, is built-in and comes into effect at over 115% of the
rated voltage.
The unit in an overvoltage protection mode cannot be recovered
by a user, it must be repaired at the factory.
Overvoltage protection (diode) also comes into effect if the voltage
is externally applied to the output side. Avoid applying voltage to
the output side.
2.5 Isolation
¡For a receiving inspection, such as Hi-Pot test, gradually increase
(decrease) the voltage for the start (shut-down).
Avoid using Hi-Pot tester with the timer because it may generate
voltage a few times higher than the applied voltage, at ON/OFF of
a timer.
No. Pin connection Function
1AC Input pin AC85 - 132V 1f
2AC 47 - 440Hz or DC110 - 170V
3FG Frame ground
4OUT +V +Output
5OUT -V -Output
AC
AC
IN OUT
+V
FG
-V
Input
Load
AC125V
2A
1 3
4
5
2
¡To decrease output ripple voltage more, install external capacitor
Co at output terminal as below.
Table 3.1 Capacity of external capacitor
at output terminal: Co[µF]
Model VAA5 VAA10
Output voltage(V)
5 220 220
12 100 100
Load
AC
AC
IN OUT Co
+V +
-V
RCi
F1
Input
Fig.3.1 Connecting method of external capacitor at output terminal
2.1 Input voltage range
¡Input voltage range of the power supplies is from AC85-AC132V
or DC110-DC170V. In cases that conform with safety standard,
input voltage range is AC100-AC120V(50/60Hz).
¡AC input voltage must have a from AC85V to AC132V or DC110V
to DC170V for normal operation. If the wrong input is applied, the
unit will not operate properly and/or may be damage.
2.2 Inrush current limiting
¡Inrush current limiting is built-in.
¡If a switch on the input side is installed, it has to be the one han-
dling the input inrush current.
2.3 Overcurrent protection
¡Overcurrent protection circuit is built-in to be operated over 105%
of the rated current. Overcurrent protection prevents the unit from
short circuit and overcurrent condition of less than 20sec. The unit
automatically recovers when the fault condition is cleared.
¡When the overcurrent/short circuit condition continues more than
20 sec., it may damage devices inside the power supply.
¡The power supply which has a current foldback characteristics
may not start up when connected to non-linear load such as lamp,
motor or constant current load. See the characteristics above.
3 Wiring to Input/
Output Pin
AC-DC Power Supplies PCB Mount Type
Instruction Manual
VAA-8
CO‘EL \ —
Inpm
E
¡Conduction noise
This unit can comply with VCCI class B of conduction noise by
attaching capacitor Ci at AC input terminal. To meet with agency
approval, the Ci should be agency approved capacitor. Moreover,
discharge resistor is required. Please refer Fig.3.1.
Ci : AC250V, 0.47µF (Agency approved unit)
R : 1/2W 220KW
(Rated: Max. operative voltage: More than 200V)
F1 : AC125V2A (Time-delay type)
4.2 Redundancy operation
¡Redundancy operation is available by connecting the unit as
shown below.
Load
Power
supply
+
-
Power
supply
+
-
l
1
l2
4.1 Series operation
¡Series operation is available by connecting the outputs of two or
more power supplies, as shown below. Output current in series
connection should be lower than the lowest rated current in each
unit.
(a) When the output voltage is less than 5V.
Power
supply
Power
supply
Load
D2
D4
D1
D3
+
-
+
-
D1 - D4: Please use Schottky Barrier Diode which has lower
forward voltage.
(b) When the output voltage is more than 12V.
Power
supply
Power
supply
Load
D1
D2
+
-
+
-
D1
-
D2: Please use Schottky Barrier Diode which has lower
forward voltage.
(c)
LoadLoad
Power
supply
+
-
Power
supply
+
-
5.1 Installation method
¡When two or more power supplies are used side by side, position
them with proper intervals to allow enough air ventilation. Ambi-
ent temperature around each power supply should not exceed the
temperature range shown in derating curve.
Input
Input
Input
Output
Normal position
Input
Input
Input
Output
Output
Output
(A) (B) (C) (D)
(E) (F)
¡When installing the components (inclusive chassis) or pattern
which is a foreign potentials around the unit, keep the distance for
more than 5mm. If this distance can not be kept, insert the insula-
tion sheet between them.
¡Avoid placing the AC input line pattern lay out underneath the unit
as it will increase the line conducted noise. Make sure to leave an
ample distance between the line pattern lay out and the unit. Also,
avoid placing the DC output line pattern underneath the unit be-
cause it may increase the output noise. Lay out the pattern away
from the unit.
4 Series Operation and
Parallel Operation 5 Assembling and
Installation Method
AC-DC Power Supplies PCB Mount Type
Instruction Manual
VAA-9
nasal. \
”Mi/W
9:202 33
Amb‘ent ‘emperamrefcl
Sargon. v81.
A.B
[t]
7 Soldering
8 Input/Output Pin
6 Cleaning
9 External Fuse
10 Ground
¡Dip soldering : 260C less than 10 seconds.
¡Soldering iron : 350C less than 3 seconds.
AC
FG DC
DC
AC Yes
Yes
No No
5.2 Derating
¡When unit mounted except below drawings, it is required to con-
sider ventilated environment by forced air cooling for temperature/
load derating. For details, please consult our sales or engineering
departments.
¿VAA5
Load factor
(70C , 40%)
1ACIN85 - 115V
100
80
60
40
20
0 10 20 30 40 50 60 70-10
0
A, B, C, D, E mounting
45 55 65
F mounting
(62C , 72%)
Load factor
Ambient temperature
2ACIN116 - 132V
1
2
¿VAA10
Load factor
A, B, C, D mounting
40 50 60
E, F mounting
(70C , 40%)
1ACIN85 - 115V
2ACIN116 - 132V
100
80
60
40
20
0 10 20 30 40 50 60 70-10
0
(62C, 72%)
Ambient temperature
1
2
Note:
In the hatched area, the specification of Ripple, Ripple Noise is dif-
ferent from other area.
¡When too much stress is applied on the input/output pins of the
unit, the internal connection may be weakened. As below Fig.8.1,
avoid applying stress of more than 9.8N (1kgf) on the pins hori-
zontally and more than 19.6N (2kgf) vertically.
¡The input/output pins are soldered on PCB internally, therefore, do
not pull or bend them with abnormal forces.
¡When additional stress is expected to be put on the input/output
pins because of vibration or impacts, fix the unit on PCB (using
silicone rubber or fixing fittings) to reduce the stress onto the in-
put/output pins.
Less than 19.6N(2kgf)
Less than
9.8N(1kgf)
Less than
9.8N(1kgf)
Less than 19.6N(2kgf)
Less than
9.8N(1kgf)
Less than
9.8N(1kgf)
Less than 19.6N(2kgf)
Less than
9.8N(1kgf)
Less than
9.8N(1kgf)
Fig.8.1 Stress on to the pins
¡Cleaning agents : IPA (Solvent type)
¡Cleaning period : When cleaning the unit, the unit must be
washed with a brush, and IPA must be kept out
of the unit.
¡After cleaning, dry them enough.
¡Fuse is not built-in on the input side. In order to secure the safety
of the unit, install a slow-blow type fuse on the input side.
Model VAA5 VAA10
Rated current 125V 2A 125V 2A
¡When installing the power supply with your unit, ensure that the
input FG terminal is connected to safety ground of the unit. How-
ever, when applying the safety agency, connect the input FG ter-
minal to safety ground of the unit.
AC-DC Power Supplies PCB Mount Type
Instruction Manual
VAA-10
CDSEL \ —
11 Others
¡This power supply is rugged PCB. Do not drop conductive objects
in the power supply.
¡At light load, there remains high voltage inside the power supply
for a few minutes after power OFF. So at maintenance, take care
about electric shock.
¡This power supply is manufactured by SMD technology. The
stress to PCB like twisting or bending causes the defect of the
unit, so handle the unit with care.
AC-DC Power Supplies PCB Mount Type
Instruction Manual
VAA-11