INSTRUCTION MANUAL
CCG
TDKLambda
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8/23
Fig.53 Caution about Connecting Output Capacitor
C1
F1
+Vin
Vin
Input Voltage
Retention Diode
Vin
Protection for Reversed Input Connection
Reverse input polarity would cause power supply damage. For cases where reverse connections
are possible, connect a protective diode and fuse. Use protective diode with higher voltage rating
than the input voltage, and with higher surge current rating than fuse current rating.
External
Output Capacitor
This power supply is capable of operating without external output capacitor.
For case of abrupt changes in load current or the line to the load is long, operation might become
unstable. In this case, it is possible to stabilize the output voltage by attaching
capacitor.
CCGS : bVout and Vout terminal
CCGD : bVout and COM terminal, Vout and COM terminal
Maximum capacitance of external output capacitor is shown in Table 51.
Note) When using 3.3V and 5V output models of CCG30S, output voltage might become unstable at
input voltage dips or short interruption on connection output capacitor. In this case, it is possible
to stabilize the output voltage by attaching input voltage retention diode and increase capacitance
of C1 as shown in Fig.53. Use input voltage retention diode with higher current rating than fuse
current rating. Moreover, choose a suitable capacitance of C1 in accordance with operating
condition.
Table 51 Maximum Capacitance of External Output Capacitor
Fig.52 Protection for Reversed Input Connection
C1
F1
+Vin
Vin
Protective
Diode
Vin
Model
3.3V
5V
Maximum capacitance
10,000μF
7,200μF
12V, ±12V
15V, ±15V
1,200μF
1,000μF
