B-NXT-1W Series
Output Specifications
Parameter
Rated Power
Conditions
TA=-40°C to 85°C
Min.
Typ.
Max.
1.0
Units
W
Voltage Set Point
Line regulation
See tolerance envelope
High VIN to low VIN
1.0
10
1.2
14
%%
%
10% load to rated load, 0303& 0503
10% load to rated load, 0505& 1205
10% load to rated load, 0506
12.8
9.2
8.3
6.8
6.3
40
15
%
10
%
Load regulation1
10% load to rated load, 0509 & 1209
10% load to rated load, 0512& 1212
10% load to rated load, 0515& 1215
BW=DC to 20MHz, 3.3V output types, 0305 & 0505
BW=DC to 20MHz, 3.3V output types,0505 & 1205
BW=DC to 20MHz, 0506
9.0
7.5
7.0
60
%
%
%
mV p-p
mV p-p
mV p-p
mV p-p
mV p-p
mV p-p
62
85
103
49
170
75
Ripple＆Noise
BW=DC to 20MHz, 0509& 1209
BW=DC to 20MHz, 0512& 1212
BW=DC to 20MHz, 0515& 1215
39
65
38
76
Note:1、12V input types have typically 3% less load regulation change.
Temperature Characteristics
Parameter
Specification
Storage
Conditions
All output types
Min.
-40
Typ.
Max.
85
Units
℃
-55
125
℃
0305, 0309, 0315
0303, 0312, 0503, 0505, 0509, 0512C, 0515
0505, 1205
25
30
43
40
℃
Case temperature
rise above ambient
℃
℃
1209, 1212, 1215
℃
Cooling
Free air convection
Technical notes
ISOLATION VOLTAGE
‘Hi Pot Test’、“Flash Tested’、”Withstand Voltage“、‘Proof Voltage”、“Dielectric Withstand Voltage'&'Isolation Test Voltage”are all terms that relate to the same thing, a test voltage, applied for a specified
time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Professional Power Module B-NXT series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
For a part holding no specific agency approvals, such as the B-NXT series, both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or 60VDC. The isolation test voltage
represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system. The part could be expected to function correctly with several hundred volts
offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a
barrier between these circuits and any user-accessible circuitry according to safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials, construction and environment.
The B-NXT series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. While parts can be expected to withstand several times the stated
test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically polyurethane) is susceptible to eventual chemical degradation when subject to very high
applied voltages thus implying that the number of tests should be strictly limited. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be
reduced by 20% from specified test voltage.
This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
Temperature derating graph
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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