D-NXT-1W Datasheet, PDF (2/3 Pages) Microdc power Technology Co., Ltd – 1W,FIXEDINPUT, ISOLATED & UNREGULATEDTWIN OUTPUT ULTRAMINIATURESMD PACKAGE DC-DC CONVERTER

D-NXT-1W Series
OUTPUT SPECIFICATIONS
APPLICATION NOTE
Item
Test Conditions
Min. Typ. Max.
Units
Output power
Line regulation
Load regulation
Load regulation
Load regulation
Load regulation
Output voltage accuracy
Temperature drift
Ripple & Noise*
Switching frequency
0.1
For Vin change of ±1%
10% to 100% load(5V output)
12.8
10% to 100% load(9V output)
8.3
10% to 100% load(12V output)
6.8
10% to 100% load(15V output)
6.0
See tolerance envelope graph
100% full load
20MHz Bandwidth
50
Full load, nominal input
100
1
±1.2
15
10
10
10
±0.03
75
W
%
%
%
%
%
%/℃
mVp-p
KHz
*Test ripple and noise by "Parallel cable"method . See detailed operation instructions at Testing of Power
Converter section, application notes.
RECOMMENDED REFLOW SOLDERING PROFILE
RECOMMENDED CIRCUIT
Remark: The curve applies only to the hot air reflow soldering
TYPICAL CHARECTERISTICS
1) Requirement On Output Load
To ensure this module can operate efficiently and reliably, a minimum load is specified for this
kind of DC/DC converter in addition to a maximum load (namely full load). During
operation, make sure the specified range of input voltage is not exceeded, the minimum output
load could not be less than 10% of the full load. If the actual output power is very small, please connect
a resistor with proper resistance at the output end in parallel to increase the load, or use our company
products with a lower rated output power (D-NXT -W2/W5).
2) Recommended testing circuit
If you want to further decrease the input/output ripple , an "LC" filtering network may be
connected to the input and output ends of the DC/DC converter , see (Figure1).
It should also be noted that the inductance and the frequency of the "LC"
Filtering network should be staggered with the DC/DC frequency to avoid mutual interference.
However , the capacitance of the output filter capacitor must be proper . If the capacitance is
too big , a startup problem might arise . For every channel of output,provided the safe and reliable
operation is ensured, the greatest capacitance of its filter capacitor sees (Table 1).
3) Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation , over-voltage and over-current
protection is a linear voltage regulator with overheat protection that is connected to the input or output
end in series (Figure2).
4) Overload Protection
Under normal operating conditions , the
protection against overload . The simplest method
the input end or add a circuit breaker to the circuit.
output circuit of these products has no
is to connect a self-recovery fuse in series at
5) Cannot use in parallel and hot swap
EXTERNAL CAPACITOR TABLE (TABLE 1)
It's not recommended to connect any external capacitor
in the application field with less than 0.5 watt output.
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