Instructions

INSTRUCTION MANUAL
CCG
TDKLambda
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Fig.53 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 between
+Vout and Vout terminal.
Maximum capacitance of external output capacitor is shown in Table 51.
Note) For 3.3V and 5V output models, 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.53. 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 51 Maximum Capacitance of External Output Capacitor
Fig.52 Protection for Reversed Input Connection
C1
F1
+Vin
Vin
Protective
Diode
Vin
Output Voltage
3.3V
5V
Maximum Capacitance
10,000μF
7,200μF
12V
15V
1,200μF
1,000μF