Cosel CHS12024, Instruction Manual, Page: 7 / 20

VR1
5k
W
+
+S
+VOUT
TRM
-S
-VOUT
1.225V
R1
RA
5.11k
W
RC
5.11k
W
R2
Control Amp.
of rated
voltage
(a) Rated output voltage 10 - 15V
VR1
5k
W
+
+S
+VOUT
TRM
-S
-VOUT
2.5V
R1
RA
2k
W
RC
1k
W
R2
Control Amp.
of rated
voltage
(b) Rated output voltage 24V
RB
2k
W
Fig.4.4 Output voltage control circuit
Table 4.2 Recommended value of external potentiometer & resistor
No. VOUT
Output adjustable range
VOUT ±5% VOUT ±10%
R1 R2 VR1 R1 R2 VR1
1 3.3V 2.2k
W
68k
W
5k
W
2.2k
W
33k
W
5k
W
2 5V 4.7k
W
68k
W
5.6k
W
33k
W
3 10V 15k
W
68k
W
15k
W
33k
W
4 12V 18k
W
68k
W
18k
W
33k
W
5 15V 22k
W
68k
W
22k
W
33k
W
6 24V 33k
W
11k
W
33k
W
6.2k
W
(2) To decrease output voltage
¡
By connecting the external resistor (RD), output voltage becomes
adjustable to decrease.
The external resistor (RD) is calculated by the following equation.
(a) Rated output voltage
:
10 - 15V
RD= -10.22 [k
W
]
5.11
Δ
(b) Rated output voltage : 24V
RD= -2 [k
W
]
1
Δ
Δ=
V
OR
-V
OD
V
OR
V
OR
: Rated output voltage [V]
V
OD
: Output voltage needed to set up [V]
RD
+VOUT
-VOUT
+S
-S
TRM
Fig.4.5 Connection to decrease output voltage
(3) To increase output voltage
¡
By connecting the external resistor (RU), output voltage becomes
adjustable to increase.
The external resistor (RU) is calculated by the following equation.
(a) Rated output voltage : 10 - 15V
RU= - - 10.22 [k
W
]
5.11
X
V
OR
X
(1+Δ)
1.225
X
Δ
5.11
Δ
(b) Rated output voltage : 24V
RU= - [k
W
]
V
OR
X
(1+Δ)
1.225
X
Δ
1+2
X
Δ
Δ
Δ= V
OU
-V
OR
V
OR
V
OR
: Rated output voltage [V]
V
OU
: Output voltage needed to set up [V]
+S
-S
TRM
RU
+VOUT
-VOUT
Fig.4.6 Connection to increase output voltage
CHS-34
DC-DC Converters Bus Converter.Power Module Type
Instruction Manual