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NAD12S10-A
DC-DC Converter Technical Manual V1.1
Input Undervoltage Protection
The converter will shut down after the input voltage
drops below the undervoltage protection threshold
for shutdown. The converter will start to work again
after the input voltage reaches the input
undervoltage protection threshold for startup. For
the Hysteresis, see the Protection characteristics.
Output Overcurrent Protection
The converter equipped with current limiting
circuitry can provide protection from an output
overload or short circuit condition.
current exceeds the output overcurrent protection
set point, the converter enters hiccup mode. When
the fault condition is
removed, the converter will
automatically restart.
Output Overvoltage Protection
When the voltage directly across the output
pins exceeds the output overvoltage protection
threshold, the converter will be latched off. After
the overvoltage condition is removed, enable the
converter by cycling the input power, the
converter can restart.
Qualification Testing
Parameter
High Accelerated Life
Test (HALT)
Power Temperature
Cycle (PTC)
Temperature Humidity
Bias (THB)
High Temperature
Operation Bias (HTOB)
GLOBAL ENERGY EFFICIENCY SPECIALIST
If the output
Units
Condition
Lowest operating temperature: -60°C (-76°F); highest operating
4
temperature: 120°C (248°F); vibration limit: 40 G
Rating input voltage,50% - 80% load;1000 temperature cycles
between -40°C (-40°F) and + 55°C 131°F) with the temperature
16
change rate of 5°C (41°F) - 10°C (50°F) per minute; Lasting for 30
minutes both at -40°C (-40°F) and + 55°C (131°F)
Maximum input voltage; 85°C (185°F); 85% RH; 1000 operating
16
hours under lowest load power
Rating input voltage; air flow:0.5 m/s (100 FLM) to 5 m/s (1000
16
FLM); 1000 operating hours under 50% - 80% load power; air
temperature:45°C(113°F) - 55°C(131°F)
Overtemperature Protection
A
temperature sensor
on the converter senses the
average temperature of the module. It protects the
converter from being damaged at high temperatures.
When the temperature exceeds the
Overtemperature protection threshold, the output
will shut down. It will allow the converter to turn on
again when the temperature of the sensed location
falls by the value of Overtemperature Protection
Hysteresis.
PCB Layout Considerations
To ensure the filtering effects, place the C
C
symmetrically near the pins. The following
out
figure shows the cable hole layouts at the input
and output terminals.
Through
V
hole
in
C
in
Through
GND
hole
Figure 72: Recommend PCB layout
19
and
in
Through
V
out
hole
C
out
Through
GND
hole
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