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TDK-Lambda
CN-A24 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 base-plate 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 “3. Maximum
Output Ripple and Noise”?
・
Is the input ripple voltage value within the specified
value?
