The copyright and authority for the interpretation of the products are reserved by Mornsun

Specifications subject to change without notice.

D_M-1W

A/0-2009

Page 2 of 2

OUTPUT SPECIFICATIONS

TYPICAL CHARACTERISTICS

Item

Test Conditions

Min.

Typ.

Max.

Units

Output power

0.1

1

W

Line regulation

For Vin change of 1%

±1.5

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.

Operating Temp.( C)

o

APPLICATION NOTE

RECOMMENDED CIRCUIT

Requirement on output load

To ensure this module can operate efficiently and reliably, During operation, the minimum

output load is not less than 10% of the full load, and that this product should never be

operated under no 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

’s

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

Vin

GND

+Vo1

0V1

DC

C

L

DC

C

+Vo2

0V2

L

C

L

(Figure 1)

Vin

GND

REG

Vin

GND

REG

+Vo1

0V1

+Vo1

0V1

DC

DC

DC

DC

+Vo2

0V2

REG

+Vo2

0V2

(Figure 2)

EXTERNAL CAPACITOR TABLE (TABLE 1)

Vin(VDC)

Cin(uF)

Cout(uF)

Vout(VDC)

3.3/5

4.7

3.3/5

4.7

It

’s not recommended to connect any external

capacitor in the application field with less than 0.5

watt output.