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TDK-Lambda
CN-A24 Series
Instruction Manual
4. Maximum Line Regulation
Maximum value of output voltage change when input
voltage is gradually varied (steady state) within
specified input voltage range.
5. Maximum Load Regulation
Maximum value of output voltage change when output
current is gradually varied (steady state) within
specified output current range.
When using at dynamic load mode, audible noise
could be heard from the power module and output
voltage fluctuation might increase. A thorough pre-
evaluation must be performed before using this power
module.
6. Base-plate Temperature vs. Output
Voltage Drift
Output voltage drift is defined as the rate of voltage change
when only base-plate temperature is changed during
operation.
7. Over Current Protection (OCP)
This power module has built-in OCP function.
When output current is in overload conditions, output
voltage is reduced. Output will recover when short
circuit or overload conditions are released. OCP setting
value is fixed and therefore, cannot be externally
adjusted.
Take note that power module might be damaged at
continuous output short circuit or over load conditions
depending on thermal conditions
.
For 5V Model Only
Take note, when output voltage is reduced below the
minmum output voltage setting of the adjustment range
due to output short circuit or over load conditions,
output might be shut down by low voltage protection
(LVP). Output can be recovered by i) manual reset of
the CNT terminal, or ii) by turning input line off and
then turning it on again after the input voltage drop
under the value described below.
5V Model
OCP(shut down) release input voltage value
: 10VDC or lower
8. Over Voltage Protection (OVP)
This power module has built-in OVP function.
OVP set point is relative to the rated output voltage
value. When output voltage exceed OVP set point,
output voltage shut down. OVP setting value is fixed
and therefore, cannot be externally adjusted.
When OVP is triggered, output can be recovered by i)
manual reset of the CNT terminal, or ii) by turning
input line off and then turning it on again after the input
voltage drop under the value described below.
OVP reset input voltage value : 10VDC and below
Verifying OVP function shall be done by increasing
output voltage with external resistor. For verifying OVP
function, avoid applying external voltage to output
terminal because this will cause power module damage.
9. Over Temperature Protection (OTP)
This power module has built-in OTP function. This
function operates and shuts down the output when
ambient temperature or internal temperature of power
module abnormally rises. OTP operates at 105
℃
to
120
℃
base-plate temperature.
OTP can be released when base-plate temperature
drops down approximately to within 80
℃
to 95
℃
.
However, take note that OTP will operate again unless
the cause of abnormal heat of the power module is
eliminated.
10. Remote Sensing (+S,
–
S terminal)
Remote sensing terminal is provided to compensate
for voltage drop across the wirings from the power
module output terminal to the load input terminal.
When remote sensing function is not used (local
sensing), short +S terminal to +V terminal and, -S
terminal to –V terminal.
When using remote sensing function, output power of
power module should be within maximum output power.
Also, use within maximum output adjustable voltage at
output terminal.
When wire is long, Power Supply operation might be
unstable due to noise. Moreover, please do enough
prior evaluation for remote sensing function by using
shielded wire, twist pair, or parallel pattern.
Fig.10-1 Remote Sensing is used
Fig.10-2 Remote Sensing is not used (Local Sensing)
CN-A24
CN-A24
Output Voltage is stabilized at load.
Output Voltage is stabilized at Module Output Terminal.
