D-NXT-2W
Series
2W, FIXED INPUT, ISOLATED & UNREGULATED TWIN OUTPUT ULTRAMINIATURE SMD PACKAGE DC-DC CONVERTER
SELECTION GUID
Model Number
Input
Voltage(VDC )
Voltage(VDC)
Nominal
(Range)
Output
Voltage
(VDC)
Output Current (mA)
Max.
Min.
Input Current(mA)(typ.)
@Max .
@Max.
Loa d
Load
@No Load
Reflected
Ripple
Current
(mA,typ.)
Max.
Capacitive
Load(µ F)
Load(µ
Efficiency
(%, typ.)
@Max.
Load
D050505NXT-2W
D050909NXT-2W
D051212NXT-2W
D051515NXT-2W
5(4.5-5.5)
5(4.5-5.5)
5(4.5-5.5)
5(4.5-5.5)
12(10.8-13.2)
12(10.8-13.2)
12(10.8-13.2)
12(10.8-13.2)
5/5
9/9
12/12
15/15
5/5
9/9
12/12
15/15
200/200
112/112
84/84
67/67
200/200
112/112
84/84
67/67
20/20
12/12
9/9
7/7
20/20
12/12
9/9
7/7
478
482
483
470
199
200
198
196
32
48
55
29
19
20
18
18
50
42
32
27
25
27
24
25
100
100
100
100
100
100
100
100
82
83
84
85
82
83
84
85
FEATURES
◆
Efficiency up to 85%
◆
Twin Independent Output
◆
Small Footprint
◆
SMD Package Styles
◆
No Heatsink Required
◆
1KVDC Isolation
◆
High Power Density
◆
Temperature Range: -40℃~ +85℃
◆
No External Component Required
◆
Internal SMD construction
◆
RoHS Compliance
D120505NXT-2W
D120909NXT-2W
D121212NXT-2W
D121515NXT-2W
Note: The D_NXT-1W series also are available in our company.
INPUT SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
Input Surge Voltage (1sec. max.)
Input Surge Voltage (1sec. max.)
Input Filter
5VDC Input Models
12VDC Input Models
-0.7
-0.7
--
--
9
18
C Filter
VDC
VDC
MODEL SELECTION
D
①
05
②
05
③
05
④
N
⑤
X
⑥
T
⑦
-2W
⑧
①Product
Series
②Input
Voltage
③The
1st Output Voltage
④The
2nd Output Voltage
⑤No
Pin
⑥Fixed
Input
⑦SMD
Package
⑧Rated
Power
ISOLATION SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
APPLICATIONS
The D_NXT-2W series are specially designed for
applications where a group of polar power supplies are
isolated from the input power supply in a distributed
power supply system on a circuit board. These products
apply to:
1) Where the voltage of the input power
supply is fixed (voltage variation
≤10%);
2) Where isolation is necessary between input and
output (isolation voltage
≤1000VDC);
3) Where the regulation of the output voltage
and the output ripple and noise are not demanding.
Such as:purely digital circuits, ordinary low frequency
analog circuits and IGBT power device driven circuits, etc.
Output Power
Output Voltage Accuracy
Line Regulation
Load Regulation
Load Regulation
Load Regulation
Load Regulation
Temperature Drift
Ripple & Noise*
Short Circuit Protection**
For Vin change of
±1%
10% to 100% load (5V output)
10% to 100% load (9V output)
10% to 100% load (12V output)
10% to 100% load (15V output)
100% full load
20MHz Bandwidth
0.2
--
2
W
See tolerance envelope graph
--
--
--
--
--
--
--
--
--
12.8
8.3
6.8
6.0
--
75
--
±1.2
15
10
10
10
±
0.03
%
%
%
%
%
%/℃
mVp-p
S
150
1
Note: *Test ripple and noise by
“
Parallel cable”
method. See detailed operation instructions at Testing of Power
Converter section, application notes.
**Supply voltage must be discontinued at the end of short circuit duration.
MICRODC reserves the copyright
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 4
D-NXT-2W
Series
COMMON SPECIFICATIONS
Item
Isolation Voltage(Vin/Vout)
Isolation Voltage(Vo1/Vo2)
Isolation Resistance(Vin/Vout)
Isolation Resistance(Vo1/Vo2)
Isolation Capacitance(Vin/Vout)
Isolation Capacitance(Vo1/Vo2)
Switching Frequency
MTBF
Case Material
Weight
--
Test Conditions
Tested for 1 minute and leakage current less
than 1 mA
Test at 500VDC
Input/Output,100KHz/1V
Full load, nominal input
MIL-HDBK-217F@25℃
Min.
1000
1000
1000
1000
--
--
--
3500
Typ.
--
--
--
--
60
60
100
--
2.1
Max.
--
--
--
--
--
--
--
--
--
Units
VDC
MΩ
pF
KHz
K hours
g
Epoxy Resin (UL94-V0)
ENVIRONMENTAL SPECIFICATIONS
Item
Storage Humidity
Operating Temperature
Storage Temperature
Temp. rise at full load
Lead Temperature
Cooling
1.5mm from case for 10 seconds
Power derating (above 85℃)
Test Conditions
Min.
--
-40
-55
--
--
Typ.
--
--
--
25
--
Max.
95
85
125
--
300
Units
%
℃
℃
℃
℃
Free air convection
EMC SPECIFICATIONS
EMI
EMS
CE
ESD
CISPR22/EN55022
IEC/EN61000-4-2
CLASS A
Contact
External Circuit Refer to Figure1
±8KV
perf. Criteria B
EMC RECOMMENDED CIRCUIT
EMI Recommended External Circuit
（LASS
A）
：
PRODUCT TYPICAL CURVE
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 4
D-NXT-2W
Series
DESIGN CONSIDERATIONS
1) Requirement on output load
To ensure this module can operate efficiently and reliably, During operation, 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
products with a lower rated output power (D-NXT-2W).
2) Overload Protection
Under normal operating conditions,
Input Fuse Selection Guide
the output circuit of these products has no protection against overload. The simplest method is to connect a
self-recovery fuse in series at the input end or add a circuit breaker to the circuit.
to increase the load, or use our company
3) Recommended circuit
If you want to further decrease the input/output
converter, see (Figure 2).
It should also be noted
that the capacitance of
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 recommended capacitance of its filter capacitor sees (Table 1).
ripple , a capacitor
filtering network may be connected to the input and output ends of
the DC/DC
It's not recommended to connect any external capacitor in the application field with less than 0.5 watt output.
4) Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation, over-voltage and over-current protection is a linear regulator and an capacitor
overheat protection that is connected to the input or output end in series (Figure 3),
regulator based on the actual voltage and current to required.
filtering network with
the recommended capacitance of its filter capacitor sees (Table 1), linear
5) Cannot use in parallel and hot swap
Note:
1. Operation under minimum load will not damage the converter; However, they may not meet all specification listed.
2. Max. Capacitive Load tested at nominal input voltage, full load and constant resistive load.
3. All specifications measured at Ta=25℃, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
4. In this datasheet, all the test methods of indications are based on our corporate standards.
5. All characteristics are for listed model only, non-standard models may perform differently, please contact our technical person for more detail.
6. Contact us for your specific requirement.
7. Specifications subject to change without prior notice.
RoHS COMPLIANT INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature
of 300°C for 10 seconds.
The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin
with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this
series are backward compatible with Sn/Pb soldering systems.
Microdc Professional Power Module,Inc.
Tel:0086-20-86000646
E-mail:tech@microdc.cn
Website:http://www.microdc.cn
REACH COMPLIANT INFORMATION
This series has proven that this product does not contain harmful chemicals, it also has
harmful chemical substances through the registration, inspection and approval.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 4 of 4
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