TDK-Lambda CHVM2 Series, Instruction Manual

Page: 9 / 11

INSTRUCTION MANUAL
CHVM2 Series
TDK­Lambda
<Page>
■ Setting and adjustment of output voltage
The output voltage of the CHVM series can be set and adjusted by external voltage and external variable resistor.
●The above characteristics (Output voltage ­VR resistor value characteristic) graph is an indication of the
resistance value R1 and R2. Please check the output voltage by the adjustable resistor etc. and adjust at the
actual using.
●Do not impress voltage higher than 4V+5% on the Vcont.
●Choose an adjustable resistor appliance with good temperature characteristics.
●When the resistance value is 5.0KΩ(R1=0Ω, R2=5KΩ), the max.voltage 4.0V will impress to Vcon pin.
Therefore, the margin of error for the resistance value will largely affect the max output voltage, so use the
resistance value as 5.0KΩ±5%.
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100% - 500V
80% - 400V
60% - 300V
40% - 200V
20% - 100V
0% - 0V
Output voltage-VR resistance value
Characteristic
O
ut
pu
t v
ol
ta
ge
VR resistor value
R1 5K
Ω
R2 0K Ω
0K
Ω
5K Ω
(
％
)
or
(V
)
470V
1KV
1.5KV
2KV type - 470V type
Output voltage -Output control voltage
Characteristic
0V
O
ut
pu
t v
ol
ta
ge
4V 3V
2V 1V
100% - 500V
470V
80% - 400V
60% - 300V
40% - 200V
20% - 100V
0% - 0V
3.76V
(
％
)
or
(
V
)
12V
SW1
Load
1
2
4
6
3
SW1
Open=ON
Short=OFF
＋
C1
5
7
＋
＋Vin
－Vin
Vout (＋ or －）
Com
(Vout)
Vref
Vcont
ON/OFF
CASE
F1
12V
SW1
Load
1
2
4
6
3
SW1
＋
C1
5
7
＋
C1=47μF
C2=4700pF
＋Vin
－Vin
Vout (＋ or －）
Vout
(Com)
Vref
Vcont
ON/OFF
F1
Output voltage control
(0V to 4V applied)
or
VR(5kΩ)
R1 R2
C2