Cosel CHS200, Инструкция по эксплуатации

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It is possible to protect the unit from the reverse input voltage by
installing an external diode as shown in Fig.3.2.
+VIN
-VIN
DC IN
Fig.3.2 Reverse input voltage protection
3.2 Wiring output pin
¡
When the CHS series supplies the pulse current for the pulse
load, please install a capacitor Co bVOUT and -VOUT
pins.
Recommended capacitance of Co is shown in Table 3.2, 3.3.
¡
If output current decreases rapidly, output voltage rises transiently
and the overvoltage protection circuit may operate.
In this case, please install a capacitor Co.
¡
Select a high frequency type capacitor. Output ripple and startup
waveform may be influenced by ESR-ESL of the capacitor and the
wiring impedance.
¡
Make sure that ripple current of Co is than its rating.
Table 3.2 Recommended capacitance Co (CHS60, CHS80, CHS120)
No. Output voltage CHS60 CHS80 CHS120
1 3.3V 0 - 20,000 F 0 - 20,000 F 0 - 20,000 F
2 5V 0 - 10,000 F 0 - 10,000 F 0 - 10,000 F
3 12V 0 - 2,200 F 0 - 1,000 F 0 - 2,200 F
Table 3.3 Recommended capacitance Co (CHS200, CHS300, CHS400, CHS500)
No. Output voltage CHS200 CHS300 CHS400/CHS500
1 3.3V 0 - 40,000 F - -
2 5V 0 - 20,000 F 0 - 20,000 F -
3 10V - 0 - 2,200 F 0 - 4,000 F
4 12V 0 - 2,200 F 0 - 2,200 F 0 - 4,000 F
5 15V - 0 - 2,200 F -
¡
Ripple and Ripple Noise are measured, as shown in the Fig.3.3.
Cin is shown in Table 2.1.
Oscilloscope
BW:100MHz
1.5m 50
W
Coaxial cable
R
C
R=50
W
F
Load
50mm
+VIN
-VIN
DC
Input
+
Measuring
board
RC
+VOUT
-VOUT
-S
+S
C=0.01
Cin
Co
22 F
Fig.3.3 Measuring method of Ripple and Ripple Noise
3 Wiring Input/Output Pin
3.1 Wiring input pin
(1) External fuse
¡
Fuse is not built-in on input side. In order to protect the unit, install
the normal-blow type fuse on input side.
¡
When the input voltage from a front end unit is supplied to multiple
units, install the normal-blow type fuse in each unit.
Table 3.1 Recommended fuse (Normal-blow type)
Model CHS30024
Rated current 20A
Model CHS6048 CHS8048 CHS12048
Rated current 5A 7A 10A
Model CHS20048/CHS30048 CHS40048 CHS50048
Rated current 15A 20A 30A
(2) External capacitor on the input side
¡
Install an external capacitor Cin, bVIN and -VIN input
pins for low line-noise and for stable operation of the power sup-
ply.
Capacitance Refer to Table 2.1
Ta = -20 to +85
C
Electrolytic or Ceramic capacitor
Ta = -40 to +85
C
Ceramic capacitor
¡
Cin is within 50mm for pins. Make sure that ripple current of Cin
is less than its rating.
(3) Recommendation for noise-filter
¡
Install an external input filter as shown in Fig.3.1 in order to re -
duce conducted noise. Cin is shown in Table 2.1.
+
Load
+VIN
-VIN
RC
+
FG
10 F
2. 2 F
1mH
DC
input
0.068 F 0.068 F 0.033 F 0.033 F
+VOUT
-VOUT
+S
-S
Cin
Fig.3.1 Recommended external input filter
(4) Reverse input voltage protection
¡
Avoid the reverse polarity input voltage. It will damage the power
supply.
CHS-23
DC-DC Converters Bus Converter.Power Module Type
Instruction Manual
Model CHS30024
Cin 660 F or more
Model CHS6048 CHS8048 CHS12048 CHS20048
Cin 66 F or more 33 F or more 47 F or more 100 F or more
Model CHS30048/CHS40048/CHS50048
Cin 200 F or more
Table 2.1 Recommended External capacitor on the input side