TDK-Lambda CUS350M Guide D'installation page 16

is within ± 5 % of nominal output voltage. Turn the trimmer clockwise, the output voltage will be increased. Take note when the output
voltage is increased excessively, over voltage protection (OVP) function may trigger and output will be shut down. Furthermore, when
increasing the output voltage reduce the output current so as not to exceed the maximum output power.
4-3. Inrush Current
These products equipped Power Thermistor to limit the inrush current. Higher inrush current will flow at higher ambient temperature or
re-input condition. Please select input switch and fuse carefully with the high temperature and re-input the power condition. The Inrush
Current value is under cold start at 25
4-4. Over Voltage Protection (OVP)
The OVP function (PSU shut down method, manual reset type) is provided. Please refer to its specification for OVP operating range. When
OVP trigger, the output will be shut down. To reset OVP, remove the input of power supply for 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.
Two methods to recovery from OVP:
Turn off the input of power supply for a few minutes, and then turn on.
Remote OFF, and then remote ON again.(Refer to 4-8)
4-5. Over Current Protection (OCP)
CUS350M Series provide the hiccup mode with automatic recovery. OCP function operates when the output current exceeds 105% of
maximum DC output current of specification. The output will be automatically recovered when the overload condition is removed. Never
operate the unit under over current or shorted conditions for more than 30seconds, which may lead damage or failure. OCP setting is fixed
and not to be adjusted externally.
4-6. Over Temperature Protection (OTP)
The OTP function (manual reset type) is provided. When ambient or internal temperature rises abnormally, OTP function operates and output
will be shut down. After shut down, remove the input and cool it down to reset OTP, and then re-input.
4-7. Power Good (ALM)
Power Good is an opto coupler providing a minimum 5ms warning before loss of output voltage since AC fail (available only with /F, /PG
models). The signal is fully isolated and the maximum sink current 2mA, maximum voltage 20V.
Examples of connecting Power Good are shown as below.
Standard Logic 0
Transistor On (<0.8V) : Power good (DC output is good)
Transistor Off (>4.5V): Power not good (AC or DC is not good)
Actual Test Waveform:
4-8. Remote ON/OFF Control
Remote ON/OFF control is an isolated control signal input which turns the power supply off by supplying 5mA to 10mA into the pin.
Remote ON/OFF control enable option available, see the below configuration.
1) The current limit resistor need be available when the supply voltage is higher than 5V.
2) A switch, relay or a transistor, can be used as ON/OFF switch.
in the specification.
℃
Vo
V
PG+
Vin
Standard Logic 1
Transistor On (>4.5V) : Power good (DC output is good)
Transistor Off (<0.8V): Power not good (AC or DC is not good)
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TDK-Lambda
CUS350M
Instruction Manual