D-XM

D-XM

Series

Series

http://www.microdc.cn

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

Page 2 of 3

ISOLATION

SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Units

Isolation voltage (Vin/Vout)

Tested for 1 minute and 1mA max

1000

VDC

Isolation voltage (Vo1/Vo2)

Tested for 1 minute and 1mA max

1000

VDC

Isolation resistance (Vin/Vout)

Test at 500VDC

1000

MΩ

Isolation resistance (Vo1/Vo2)

Test at 500VDC

1000

MΩ

Isolation capacitance(Vin/Vout)

30

pF

Isolation capacitance(Vo1/Vo2)

30

pF

APPLICATION

NOTE

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 to increase the load , or use our company

products with a lower rated output power.

Recommended 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 (Figure 1).

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 recommended capacitance of its filter

capacitor sees (Table 1).

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 (Figure 2).

Overload Protection

Under normal operating conditions, 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.

No parallel connection or plug and play

TYPICAL

CHARACTERISTICS

RECOMMENDED

CIRCUIT

It's not recommended to connect any external capacitor in the

application field with less than 0.5 watt output.

OUTPUT

SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Units

Output power

0.1

1

W

Line regulation

For Vin change of 1%

±

1.5

%

Load regulation

10% to 100% load (3.3V output)

15

20

%

Load regulation

10% to 100% load(5V output)

12.8

15

%

Output voltage accuracy

See tolerance envelope graph

Temperature drift

100% full load

±

0.03

%/℃

Ripple & Noise*

20MHz Bandwidth

75

100

mVp-p

Switching frequency

Full load, nominal input

130

KHz

*Test ripple and noise by "Parallel cable"method. See detailed operation

instructions at Testing of Power

Converter section, application notes.