Cosel LDA10F User manual

Basic Characteristics Data
*1Refer to instruction manual.
*The value of input current is at ACIN 100V and rated load.
*Switching freguency of flyback converter depends on input voltage and load factor.
input fuse
250V 15A
250V 6.3A
250V 5A
250V 5A
250V 3A
250V 3A
250V 2A
250V 2A
Rated
Basic Characteristics Data
LDA300W
LDA150W
LDA100W
LDA75F
LDA50F
LDA30F
LDA15F
LDA10F
Model
Forward converter
Forward converter
Forward converter 7.5
3.6
2.4
140
140
140
60 - 500
45 - 400
frequency
Switching
Circuit method
Forward converter
Forward converter
Forward converter
Flyback converter
Flyback converter
[A]
1.8
1.3
0.8
0.37
0.25
current
Input
140
140
140
operation availability
Series/Parallel
Parallel
operation
Thermistor
Thermistor
Triac CEM-3
CEM-3
CEM-3
Yes
Yes
Yes
Yes
Yes
Yes
*1
*1
*1
PCB/Pattern
Thermistor
Thermistor
Thermistor
Thermistor
Thermistor
Inrush
protection
circuit
current
CEM-3
CEM-3
CEM-3
CEM-3
CEM-3
Material
Double
sided
Yes
Yes
Yes
Yes
Yes
sided
Single
*1
Yes
Yes
Yes
*1
*1
*1
*1
*1
Series
operation
*1
[kHz]
LDA-18
LDA
June29,2011

1 Terminal Block
2 Function
3
5
Series Operation and Parallel Operation
Ground
LDA-19
4
6
Assembling and Installation Method
Others
4.1
4.2
4.3
Instruction Manual
LDA-21
LDA-23
LDA-24
LDA-26
LDA-26
LDA-20
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Input voltage range
Installation method
Inrush current limiting
Derating
Mounting screw
Overcurrent protection
Overvoltage protection
Output voltage adjustment range
Isolation
Remote ON/OFF
Remote sensing
LDA-21
LDA-21
LDA-21
LDA-21
LDA-22
LDA-22
LDA-22
LDA-22
LDA-24
LDA-24
LDA-25
LDA
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

1 Terminal Block
LDA-20
lLDA10F
lLDA75F
lLDA100W
lLDA150W
lLDA300W
lLDA15F
lLDA30F
lLDA50F
t
t
-Output
+Output
t
t
-Output
+Output
t
t
-Output
+Output
t
t
-Output
+Output
AC(L)
AC(N)
Frame ground
AC(L)
AC(N)
Frame ground
AC(L)
AC(N)
Frame ground
AC(L)
AC(N)
Frame ground
AC(N)
AC(L)
Frame ground
t
t+Output
t
t
t
t
t
t
t
+Output
t
t+Output
-Output
t
t
t
t
t
t
t
t
-Output
-Output
t
t
AC(L)
AC(N)
Frame ground
AC(L)
AC(N)
Frame ground
AC(L)
AC(N)
Frame ground
LDA
t
t-Output+Output
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

2 Function 2.3 Overcurrent protection
n
n
Overcurrent protection is built-in and comes into effect at over
105% of the rated current. Overcurrent protection prevents the
unit from short circuit and overcurrent condition. The unit auto-
matically recovers when the fault condition is cleared.
The power supply which has a current foldback characteristics
may not start up when connected to nonlinear load such as lamp,
motor or constant current load. See the characteristics below.
lLDA10F LDA15F
2.4 Overvoltage protection
n
n
Overvoltage protection circuit, clamping the output voltage by
zener diode, is built-in and comes into effect at over 115% of the
rated voltage (For 3V type, overvoltage protection kicks in at over
4V). The unit in an overvoltage protection mode cannot be recov-
ered by a user; it must be repaired at the factory. Overvoltage pro-
tection (diode) also comes into effect if the voltage is externally ap-
plied to the output side. Avoid applying voltage to the output side.
The overvoltage protection circuit is built-in and comes into effect
at 115 - 140% of the rated voltage (except 3V output voltage type :
it operates at 4.00 - 5.25V). The AC input should be shut down if
overvoltage protection is in operation. The minimum interval of
AC recycling for recovery is 2 to 3 minutes ( ).
The recovery time varies depending on input voltage.
Please avoid applying the over-rated voltage to the output termi-
nal. Power supply may operate incorrectly or fail.In case of oper-
ating a motor etc. , please install an external diode on the output
terminal to protect the unit.
l
l
LDA10F LDA15F
LDA30F - LDA300W
Remarks:
LDA-21
Unit:[A typ]
No.
1
2
3
4
5
6
7
8
Model Table 2.1 Inrush current
AC100V
15
15
15
15
15
30
30
30
AC200V
30
30
30
30
30
30
30
30
LDA
LDA
LDA
LDA
LDA
LDA
LDA
LDA
10F
15F
30F
50F
75F
100W
150W
300W
Fig.2.1 Current foldback characteristics
Note: In case of nonlinear load, the output is locked out at A point.
: Load characteristics of power supply.
: Characteristics of load (lamp, motor, constant current load, etc.)
2.1 Input voltage range
2.2 Inrush current limiting
n
n
n
n
n
n
n
n
n
n
The range is from AC85V to AC264V or DC110V to DC370V.
AC input voltage must have a range from AC85V to AC264V for
normal operation. If the wrong input is applied, the unit will not op-
erate properly and/or may be damaged.
The range is from AC85V to AC132V/AC170V to AC264V which
is automatically selected internally. But after the input voltage is
applied, avoid changing AC100V AC200V.
AC input voltage must have a range from AC85V to AC132V/
AC170V to AC264V for normal operation. If the wrong input is ap-
plied, the unit will not operate properly and or may be damaged.
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.
The thermistor is used for protection from inrush current. When
power is turned ON/OFF repeatedly within a short period of time,
it is necessary to have enough time for power supply to cool
down.
The thyristor technique is used for protection from inrush current.
When power is turned ON/OFF repeatedly within a short period of
time, it is necessary to have enough time between power ON and
OFF to operate resistance circuit for inrush current.
In cases that conform with safety standard, input voltage range is
AC100-AC240V(50/60Hz).
In cases that conform with safety standard, input voltage range is
AC100-AC120V, AC200-AC240V(50/60Hz).
l
l
l
l
LDA10F - LDA75F
LDA100W - LDA300W
LDA10F - LDA150W
LDA300W
LDA
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

2.5 Output voltage adjustment range
2.6 Isolation
2.7 Remote ON/OFF (”-R”)
n
n
n
n
n
n
n
n
n
n
Adjustment of output voltage is possible by using potentiometer
(only available to 3V output voltage type).
Output voltage is increased by turning potentiometer clockwise
and is decreased by turning potentiometer counterclockwise.
Option ”-Y” is recommended which can adjust the output voltage.
Adjustment of output voltage is possible by using potentiometer
(only available to 3 and 5V output voltage type).
Output voltage is increased by turning potentiometer clockwise
and is decreased by turning potentiometer counterclockwise.
Option unit ”-Y” is recommended which can adjust the output volt-
age.
Adjustment of output voltage is possible by using potentiometer.
Output voltage is increased by turning potentiometer clockwise
and is decreased by turning potentiometer counterclockwise.
For a receiving inspection, such as Hi-Pot test, gradually in-
crease (decrease) the voltage for the start (shut down). Avoid us-
ing 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.
If the unit is tested on the isolation between input & output and
output & FG, remote ON/OFF must be shorted to output .
Option ”-R” is available for remote ON/OFF.
l
l
l
l
LDA10F - LDA75F
LDA100W LDA150W
LDA300W
LDA50F - LDA300W
nWhen external power source is in the range of 4.5 - 12V
(LDA300W : 4.5 - 12.5V), current limit resistance R is not re-
quired. However, when external power source exceeds 12V
(LDA300W : 12.5V), current limit resistance R must be con-
nected.
To calculate the current limit resistance use following equation:
Vcc-(1.1+ Ri 0.005)
R[ ]= 0.005
where:
Vcc = External power source
Ri = The internal resistance (see table)
n
n
n
n
n
n
n
n
n
A wrong connection may damage the internal components of the
unit.
Remote ON/OFF circuit (RC(+), RC(-)) is isolated from input, out-
put and FG.
When not using this function, confirm that terminals are shorted
between +S and +M, and between -S and -M with short pieces.
When using this function, wiring should be done without short
pieces.
Devices inside the power supply might be damaged when poor
connection on load lines occurs, e.g. because of loose connector
screws.
Thick wire should be used for wiring between power supply and
load, and line voltage drop should be less than 0.3V.
When long sensing wire is required, use C.
Twisted-pair wire or shield wire should be used for sensing wire.
When remote sensing function is used, output voltage might be-
come unstable because of a impedance of wiring and load condi-
tion. And the power supply should be evaluated enough. Following
are examples to improve it.
-S sensing wire is removed and terminals between -M and -S
are shorted.
C and R are connected as above figure.
(1) When not using remote sensing function
2.8 Remote sensing
lLDA300W
LDA-22
Between RC(+) and RC(-) Output
SW OFF
(0 - 0.5V)
SW ON
(4.5 - 12V)
(LDA300W : 4.5 - 12.5V) ON
OFF
Model
LDA50F - 150W 680
780
LDA300W
Ri[ ]
LDA
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

(2) When using remote sensing function n
n
Even a slight difference in output voltage can affect the balance
between the values of I and I .
Please make sure that the value of I does not exceed the rated
current of a power supply.
I the rated current value
12
3
3
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)
lLDA30F - LDA300W
LDA-23
C
+M
+S
Attention for
connection
+
Attention for
connection
Use twisted-pair wire or shielded wire
-S
-M
-+Load
(-)
(+)
R
lLDA10F LDA15F
nSeries 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.
When the output voltage is less than 5V
3 Series Operation and
Parallel Operation
When the output voltage is more than 12V
D1 - D4: Please use schottky Barrier Diode.
n
n
Parallel operation is not possible.
Redundancy operation is available by wiring as shown below.
nEven a slight difference in output voltage can affect the balance
between the values of I and I .
Please make sure that the value of I does not exceed the rated
current of a power supply.
I the rated current value
12
3
3
(b)
D1 D2: Please use schottky Barrier Diode.
n
n
Parallel operation is not possible.
Redundancy operation is available by wiring as shown below.
LDA
I2
I1I3
-
-
+
Power
Supply
Power
Supply
+
Load
I2
I1I3
-
-
+
Power
Supply
Power
Supply
+
Load
Power
Supply +
Power
Supply +
Load
D1
D2
D4
D3
+
-
+
-
Power
Supply
Power
Supply
Load
D1
D2
Load
Load
Power
Supply +
Power
Supply
-
-
+
Power
Supply +
-
Load
Power
Supply +
-
-
-
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

lLDA15F
lLDA30F
lLDA50F
lLDA75F
LDA-24
4 Assembling and
Installation Method
4.1 Installation method
n
n
When two or more power supplies are used side by side, position
them with proper intervals to allow enough air ventilation. Ambient
temperature around each power supply should not exceed the
temperature range shown in derating curve.
In case of metal chassis, keep the distance between l & l for to
insulate between lead of component and metal chassis. If it is
less than l & l , insert the insulation sheet between power supply
and metal chassis.
12
12
4.2 Derating
nThe operative ambient temperature is different by with/without
case cover or mounting position. Please refer drawings as below.
lLDA10F
=24mm min
2
2
2
CN1
2
=18mm min
CN1 2
Note:
In the hatched area, the specification of Ripple, Ripple Noise is dif-
ferent from other area.
LDA
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

lLDA100W
lLDA150W
lLDA300W
lLDA300W
Mounting method
LDA-25
Note:
In the slanted area, the specification of Ripple, Ripple Noise is dif-
ferent from other area.
Note:
Ventilation is required so that part A of heat sink is below 85 in
any case. Please flow air to the components to the direction of Air
or Air .
n
n
n
(F) mounting is not possible when unit is with case cover, but if
need to operate unit by (F) positioning with case cover, tempera-
ture / load derating is necessary. For more details, please consult
our sales or engineering departments.
The mounting screw should be M3. The hatched area shows the
allowance of metal parts for mounting.
Please be carefull with that metal parts do not touch mounted
parts at front side, where major components are mounted, when
a power supply is installed with them.
4.3 Mounting screw
lLDA10F
nWhen unit mounted except below drawings, it is required to con-
sider ventilated environment by forced air cooling for tempera-
ture/load derating. For details, please consult our sales or engi-
neering departments.
0
20
40
80
60
100
0-10 10 20 30 40 50 60 70
(B), (C), (D), (E), (F) mounting
Ambient temperature [ ]
Load factor [%]
Convection
Forced air
(A) mounting
The rated power is different depend on ForcedAir/Convection
cooling (Please refer Chart in right hand side).
Convection
Forced air
120W
200W
207W
204W
210W
216W
216W
210W
201.6W
-3
-5
-9
-12
-15
-18
-24
-30
-48
180W
300W
306W
324W
330W
306W
336W
300W
302.4W
Output
voltage
TB1 TB2
Air
Air
Part A
CN1
CN1
CN1
CN1
(A)
(B) (C) (D)
CN1
CN1
(E)
(F)
Normal position
LDA
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011

LDA-26
Unit[mm]
nKeep isolation distance between screw and internal components
in case of option ”-S”, ”-SN”, as below chart.
lLDA75F - LDA150W lLDA30F - LDA75F
lLDA100W - LDA300W
lLDA300W
TB1 TB2
10
10
10
10
10
10
10
10
26 10
10 165
9
99
9
9
99
9
CN1
5 Ground
6 Others
nWhen installing the power supply with your unit, ensure that the in-
put FG terminal or mounting hole FG is connected to safety
ground of the unit. However when applying the safety agency,
connect the input FG terminal to safety ground of the unit.
n
n
n
This power supply is the rugged PCB type. Do not drop conduc-
tive 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.
LDA
lLDA15F - LDA50F lLDA10F LDA15F
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June29,2011
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