TDK-Lambda CN-A110 Series, Instruction Manual, Page: 16 / 16

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TDK-Lambda
CN-A110 Series
Instruction Manual
■
Before concluding power module damage
Verify following items before concluding power module
damage.
1) No output voltage
・ Is specified input voltage applied?
・
Are the ON/OFF control terminal (CNT), remote sensing
terminal (+S,
– S), output voltage trimming terminal (TRM)
correctly connected?
・
For cases where output voltage adjustment is used, is the
resistor or variable resistor setting, connections correctly done?
・
Are there no abnormalities in the output load used?
・ Is the baseplate temperature within the specified temperature
range?
2) Output voltage is high
・
Are the remote sensing terminals (+S, – S) correctly
connected?
・ Is the measurement done at the sensing points?
・
For cases where output voltage adjustment is used, is the
resistor or volume setting, connections correctly done?
3) Output voltage is low
・ Is specified input voltage applied?
・ Are the remote sensing terminals (+S, – S) correctly
connected?
・ Is the measurement done at the sensing points?
・ For cases where output voltage adjustment is used, is the
resistor or variable resistor setting, connections correctly done?
・ Are there no abnormalities in the output load used?
4) Load regulation and line regulation is large
・ Is specified input voltage applied?
・ Are the input terminals and the output terminals firmly
connected?
・ Is the measurement done at the sensing points?
・
Is the input or output wire too thin?
5) Output ripple voltage is large
・ Is the measuring method used the same or equivalent with
the specified method in the Application Notes?
・ Is the input ripple voltage value within the specified value?