INSTRUCTION MANUAL
CUS60M Series
TDK-Lambda
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6-4. Over Voltage Protection (OVP)
The OVP function (Inverter shut down method, manual reset type) is provided. Please refer to its specification for OVP
operating range. When OVP triggers, the output will be shut down. To reset OVP, remove the input of power supply for a
few minutes, and then re-input. In addition, the setting value of OVP is fixed and not adjustable. Pay attention not to
apply higher voltage externally to the output terminal to avoid unit failure. In case of inductive load, put protective diode
in series to the output power line. In heavy load condition, OCP may triggered before output reach OVP threshold.
6-5. Over Current Protection (OCP)
OCP is hiccup mode with automatic recovery. Outputs will be automatically recovered when the overload condition is
canceled. OCP function operates when the output current exceeds 105% of maximum DC output current of specification.
Never operate the unit under over current or shorted conditions for more than 30seconds, which may lead to damage or
insulation failure. OCP setting is not adjustable externally.
6-6. Output Ripple & Noise
The standard specification for maximum ripple value is measured according to measurement circuit specified as below.
When load lines are longer, ripple will become larger. In this case, electrolytic capacitor, film capacitor, etc. might be
necessary to use across the load terminal. The output ripple cannot be measured accurately if the probe ground lead of
oscilloscope is too long. A circuit reducing light load input power consumption is built in this model. When output
current is within 0-35% of rated load, the internal switch element is intermittent operated, to decrease switching loss. The
specification of the Ripple & Noise changes by this intermittent operation. The dynamic load response characteristic
changes by this intermittent operation too. Different input voltage and dynamic load condition has different dynamic load
response characteristic. Please contact us for details.
6-7. Series Operation
For series operation, either method (A) or (B) is possible.
Method (A)
Method (B)
(*1) Please select a bypass diode with maximum forward current rating more than output load current. And maximum
reverse voltage must withstand each power supply output voltage.
7/19
Load
C1
150mm
C2
Coaxial Cable
1.5m 50
Ω
Bandwidth : 20MHz
Power
Supply
+V
-V
C1 : 0.1uF Cap., Film
C2 : 47uF Cap., Elect
Oscilloscope
-V
-V
+V
+V
+
-
Load
Power
Supply
Power
Supply
(*1)
-V
-V
+V
+V
+
+
-
-
Load
Load
Power
Supply
Power
Supply
