INSTRUCTION MANUAL
ZWS240RC
Series
TDKLambda
<Page>
43. Inrush Current
Inrush current is suppressed by power thermistor for the product. Higher current will flow at higher ambient
temperature or reinput on condition. Please select input switch or external fuse carefully. The inrush
current value specified in the specification is under cold start condition (at 25
o
C).
44. Over Voltage Protection (OVP)
The OVP function is inverter shut down method and manual reset type. OVP function operates within 115135%
of nominal output voltage.
When OVP triggers, the output will be shut down. To reset OVP, remove the input of the product for a few
minutes, and then reinput. In addition, the setting value of OVP is fixed and not adjustable. Never apply higher
voltage externally to the output terminal to avoid the product Failure. In case of inductive load, put protective
diode in series to the output power line.
45. Over Current Protection (OCP)
Constant current limit with automatic recovery.
OCP function operates when the output current exceeds 105% of maximum DC output current of specification.
The outputs will be automatically recovered when the overload condition is removed. Never operate the unit
under over current or shorted conditions, which may lead unit damage. OCP setting is fixed and cannot be
adjusted externally.
46. Output Ripple & Noise
The specified maximum ripple & noise value is measured according to measurement circuit specified by
JEITARC9131C. When load lines are longer, ripple will becomes larger. In this case, electrolytic capacitor, film
capacitor, etc. might be necessary to be used across the load terminal.
The output ripple cannot be measured accurately if the probe ground lead of oscilloscope is too long.
5/12
Coaxial Cable
1.5 m 50
Ω
C2
+
Load
A
Product
＋
－
150mm
C1
R1
C3
Oscilloscope
Bandwidth
：
100MHz
C1
：
0.1uF
Film Cap.
C2
：
100uF
Electrolytic Cap.
C3
：
4700pF Ceramic Cap.
R1
：
50
Ω
