A-XT-1W
Series
Output Specifications
Parameter
Rated Power
Voltage Set Point
Line regulation
TA=-40°C to 85°C
See tolerance envelope
High VIN to low VIN
10% load to rated load, 0303& 0503
10% load to rated load, 5V output types
10% load to rated load, 0309
Load regulation
1
10% load to rated load, 0509 & 1209
10% load to rated load, 0312 & 0315
10% load to rated load, 0512 & 1212
10% load to rated load, 0515 & 1215
BW=DC to 20MHz, 3.3V output types, A0305 & A0505
BW=DC to 20MHz, all other 5V output types
Ripple＆Noise
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
Note:1、12V input types have typically 3% less load regulation change.
1.0
10
10
9.0
6.5
11
6.0
6.0
40
50
35
50
65
1.2
15
12
10
8.0
14
8.5
7.0
80
100
80
110
110
%%
%
%
%
%
%
%
%
mV p-p
mV p-p
mV p-p
mV p-p
mV p-p
Conditions
Min.
0.1
Typ.
Max.
1.0
Units
W
Temperature Characteristics
Parameter
Specification
Storage
Case temperature rise
above
ambient
Cooling
0305, 0505, 0312, 0315
0303, 0309, 0503
0505, 1205
All other variants
Free air convection
All output types
Conditions
Min.
-40
-55
Typ.
Max.
85
125
Units
℃
℃
℃
℃
℃
℃
19
25
46
35
Technical notes
ISOLATION VOLTAGE
‘Hi
Pot Test’
“
、
Flash Tested’
”
、
Withstand Voltage“
‘
、
Proof Voltage”
“
、
Dielectric Withstand Voltage'&'Isolation Test Voltage” all terms that relate to the same thing, a test voltage, applied for a specified time,
are
across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Professional Power Module A-XT-1W 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 A-XT-1W 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
A-XT-1W 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
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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