NCX10S SERIES
Isolated 10W Single Output DC/DC Converters
ISOLATION CHARACTERISTICS
Parameter
Conditions
MIN
1000
1
TYP
MAX
Units
VDC
GΩ
Isolation Voltage Flash tested for 1 second
Resistance VISO=500VDC
ENVIRONMENTAL CHARACTERISTICS
Parameter
Substrate Temp.
Storage
Conditions
MIN
–40
–40
TYP
MAX
125
125
Units
°C
°C
Full load
Absolute MAX internal temperature
Thermal Protection Operates at substrate temperature
150
°C
THERMAL PERFORMANCE
NCX10S24033
11
NCX10S24050
11
NCX10S48033
11
10
9
10
9
10
9
8
7
6
5
4
8
7
6
5
4
8
Still Air
100lfm
200lfm
300lfm
400lfm
Still Air
100lfm
200lfm
300lfm
Still Air
100lfm
200lfm
7
6
5
4
-40
10
60
110
-40
10
60
110
-40
10
60
110
Ambient Temperature (°C)
Ambient Temperature (°C)
Ambient Temperature (°C)
NCX10S48050
11
10
9
(Maximum permissable load in still air)
UL 60950 RECOGNITION
Part Number
-40°C
25°C
10.0
10.0
10.0
10.0
70°C
10.0
10.0
10.0
10.0
75°C
9.0
10.0
9.5
80°C
7.9
8.9
8.4
10.0
85°C
6.5
7.2
7.1
9.6
90°C
5.0
5.2
5.5
8.0
Units
8
Still Air
100lfm
NCX10S24033 10.0
NCX10S24050 10.0
NCX10S48033 10.0
NCX10S48050 10.0
7
6
5
4
W
10.0
-40
10
60
110
Ambient Temperature (°C)
APPLICATION NOTES
In a typical application, the NCX10S series
of DC/DC converters require nothing more
than a dc supply of correct polarity and
voltage to generate its specified output. These
notes are intended to offer help in the use of
other facilities offered by these converters,
and to provide assistance in achieving their
full potential.
VOLTAGE TRIMMING
The trimming (adjust) input on the secondary
side allows output voltage adjustment within
the capability of the power circuit.
15% when the wiper is at the positive output,
or increased by about 24% when at the
negative rail. Regulation will be maintained to
at least 10% adjustment either way.
When open circuit, the trimming pin ADJ
operates at near half the output voltage. A
basic trimming arrangement consists of a
potentiometer of 10kΩ to 100kΩ connected
across the output, with its wiper connected to
the ADJ pin (see figure 1). Dependent on
model, the output will be reduced by about
If finer adjustment is required, a resistor may
be included between the wiper and the pin.
For example, 62kΩ will restrict a 3.3V model
to 5% adjustment range. The corresponding
values for the 5V model is 56kΩ.
+VIN
+VOUT
DC
ADJ
0V
100KΩ
–VIN
DC
Figure 1: Voltage Trimming
CANDD [ C&D TECHNOLOGIES ]
