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

Specifications subject to change without notice.

MSA_((M)D-3W&MSB_(M)D-3W

A/2-2009

Page 2 of 3

OUTPUT SPECIFICATIONS

TYPICAL CHARACTERISTICS

Item

Test conditions

Min.

Typ.

Max.

Units

Output power

See below products program

0.3

3

W

Positive voltage accuracy

Refer to recommended circuit

±1

±3

Negative voltage accuracy Refer to recommended circuit

±3

±5

Load regulation

From 10% to 100% load

±0.5

±1*

Line regulation

Input voltage from low to high

±0.2

±0.5

%

Temperature drift(Vout)

Refer to recommended circuit

±0.03

%/

Ripple & Noise**

20MHz Bandwidth

50

100

mVp-p

Switching frequency

100% load, nominal input voltage

300

KHz

*Dual output models unbalanced load:

±5%.

**Test ripple and noise by

“parallel cable” method. See detailed operation instructions at Testing of Power

Converter section, application notes.

Operating Temp.(

)

C

100

COMMON SPECIFICATIONS

RECOMMENDED CIRCUIT

Item

Test Conditions

Min.

Typ.

Max.

Units

Storage humidity

95

%

Operating temperature

-40

85

Storage temperature

-55

125

Temp. rise at full load

15

Lead temperature

1.5mm from case for 10 seconds

300

°C

No-load Power consumption

0.2

W

Cooling

Free air convection

Short circuit protection

Continuous, Automatic Recovery

Case material

D: Plastic (UL94-V0);

MD: Steel, Nickel Coated

MTBF

1000

K hours

Weight

15

g

APPLICATION NOTE

Requirement On Output Load

In order to ensure the product operate efficiently and reliably, in addition to a max load

(namely full load), a minimum load is specified for this kind of DC/DC converter. Make sure the

specified range of input voltage is not exceeded, the minimum output load no less than 10%

load. If the actual load is less than the specified minimum load, the output ripple may increase

sharply while its efficiency and reliability will reduce greatly. If the actual output power is very

small, please add an appropriate resistor as extra loading, or contact our company for other

lower output power products.

Recommended Circuit

All the MSA_(M)D-3W & MSB_(M)D-3W Series have been tested according to the following

recommended testing circuit before leaving factory. This series should be tested under load.

Never be tested under no load (see Figure 1).

If you want to further decrease the input/output ripple, you can increase capacitance properly

or choose capacitors with low ESR. 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 greatest capacitance of its filter

capacitor sees (Table 1). Generally: If you want to use the products in high EMI, please choose

our metal packaged products (MSA_MD-3W & MSB_MD- 3W). General:

Cin:

5V&12V

100

μF

24V&48V

10

μF-47μF

Cout: 10

μF/100mA

Input Current

When it is used in unregulated power supply, be sure that the fluctuating range of the power

supply and the rippled voltage do not exceed the module standard. Input current of power

supply should afford the startup current of this kind of DC/DC module (See figure 2), General:

Ip

≤1.4*Iin-max

No parallel connection or plug and play

DC

DC

Vin

GND

+Vout

0V

Cin

Vin

GND

+Vout

0V

Cin

DC

DC

-Vout

Single Output

(Figure 1)

Input Voltage (V)

Input Voltage

Range

Ip

Output External Capacitor Table(Table 1)

Single Vout

(VDC)

Cout

(uF)

Dual Vout

(VDC)

Cout

(uF)

5

1000

±5

680

9

680

±9

470

12

470

±12

330

15

330

±15

220

24

220

±24

100