A

A

A

A

A

A

A

-XT-1W

-XT-1W

-XT-1W

-XT-1W

-XT-1W

-XT-1W

Series

http://www.microdc.cn

Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646

Page 2 of 6

Output

Output

Output

Output

Output

Output

Output

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Parameter

Conditions

Min.

Typ.

Max.

Units

Rated Power

TA=-40°C to 85°C

1.0

W

Voltage Set Point

See tolerance envelope

Line regulation

High VIN to low VIN

1.0

1.2

%%

10% load to rated load, 0303& 0503

10

15

%

10% load to rated load, 5V output types

10

12

%

10% load to rated load, 0309

9.0

10

%

10% load to rated load, 0509 & 1209

6.5

8.0

%

10% load to rated load, 0312 & 0315

11

14

%

10% load to rated load, 0512 & 1212

6.0

8.5

%

10% load to rated load, 0515 & 1215

6.0

7.0

%

Ripple＆Noise

BW=DC to 20MHz, 3.3V output types, A0305 & A0505

40

80

mV p-p

BW=DC to 20MHz, all other 5V output types

50

100

mV p-p

BW=DC to 20MHz, 9V output types

35

80

mV p-p

BW=DC to 20MHz, 12V output types

50

110

mV p-p

BW=DC to 20MHz, 15V output types

65

110

mV p-p

Note:1、12V input types have typically 3% less load regulation change.

Temperature

Temperature

Temperature

Temperature

Temperature

Temperature

Temperature

Characteristics

Characteristics

Characteristics

Characteristics

Characteristics

Characteristics

Characteristics

Parameter

Conditions

Min.

Typ.

Max.

Units

Specification

All output types

-40

85

℃

Storage

-55

125

℃

Case temperature rise

above

ambient

0305, 0505, 0312, 0315

19

℃

0303, 0309, 0503

25

℃

0505, 1205

46

℃

All other variants

35

℃

Cooling

Free air convection

Technical

Technical

Technical

Technical

Technical

Technical

Technical

notes

notes

notes

notes

notes

notes

notes

ISOLATION

ISOLATION

ISOLATION

ISOLATION VOLTAGE

VOLTAGE

VOLTAGE

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 A-XT 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 specifi c agency approvals, such as the A-XT 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

REPEATED

REPEATED

REPEATED HIGH-VOLTAGE

HIGH-VOLTAGE

HIGH-VOLTAGE

HIGH-VOLTAGE ISOLATION

ISOLATION

ISOLATION

ISOLATION TESTING

TESTING

TESTING

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 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 specifi ed 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

Temperature

Temperature

Temperature

Temperature

Temperature

Temperature

derating

derating

derating

derating

derating

derating

graph

graph

graph

graph

graph

graph

graph