NCX10S SERIES
Isolated 10W Single Output DC/DC Converters
ISOLATION CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Isolation Voltage
Resistance
Flash tested for 1 second
V
ISO
=500VDC
1000
1
VDC
GΩ
ENVIRONMENTAL CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Substrate Temp.
Full load
Storage
Absolute MAX internal temperature
Thermal Protection Operates at substrate temperature
–40
–40
150
125
125
°C
°C
°C
THERMAL PERFORMANCE
NCX10S24033
11
10
Ambient Power (W)
Ambient Power (W)
9
8
7
6
5
4
-40
Still Air
100lfm
200lfm
300lfm
400lfm
NCX10S24050
11
10
9
8
7
6
5
4
-40
10
60
Ambient Temperature (°C)
110
Still Air
100lfm
200lfm
300lfm
NCX10S48033
11
10
Ambient Power (W)
9
8
7
6
5
4
-40
10
60
Ambient Temperature (°C)
110
Still Air
100lfm
200lfm
10
60
Ambient Temperature (°C)
110
NCX10S48050
11
10
Ambient Power (W)
9
8
7
6
5
4
-40
10
60
Ambient Temperature (°C)
110
Still Air
100lfm
UL 60950 RECOGNITION
(Maximum permissable load in still air)
Part Number
-40°C
25°C
70°C
75°C
80°C
85°C
90°C
Units
NCX10S24033
NCX10S24050
NCX10S48033
NCX10S48050
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
9.0
10.0
9.5
10.0
7.9
8.9
8.4
10.0
6.5
7.2
7.1
9.6
5.0
5.2
5.5
8.0
W
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.
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
+V
IN
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.
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.
+V
OUT
DC
ADJ
100KΩ
–V
IN
Figure 1: Voltage Trimming
0V
DC
CANDD [ C&D TECHNOLOGIES ]
