MORNSUN reserves the copyright

Specifications subject to change without notice.

E_M-1W

A/0-2008

Page 2 of 2

TYPICAL CHARACTERISTICS

Operating Temp.( C)

o

OUTLINE DIMENSIONS& PIN CONNECTION

1

2

46

5

1 2

4

6

5

RECOMMENDED FOOTPRINT

Top view, grid

dia meter

1.00mm(0.039 inch)

：

：

2. 54mm(0 .1in ch)

FOOT P RINT DETAILS

Pin

Functions

1

2

4

6

5

Vin

GND

+Vo

First Angle Projection

(0.020)

Note:

Unit:mm(inch)

Pin section:0.50*0.3mm(0.020*0.012inch)

Pin tolerances: 0.10mm

0.004inch

Generaltolerances: 0.25mm( 0.010inc h)

（）

+

+

+

+

1.9

(0.075)

APPLICATION NOTE

Requirement on output load

To ensure this module can operate efficiently and reliably, a minimum load is specified for

this kind of DC/DC converter in addition to a maximum load (namely full load). During

operation, make sure the specified range of input voltage is not exceeded, 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.

Overload Protection

Under normal operating conditions, the output circuit of these products has no protection

against over-current and short-circuits. The simplest method is to connect a self-recovery

fuse in series at the input end or add a circuit breaker to the circuit.

Filtering

In some circuits which are sensitive to noise

and ripple, a filtering capacitor may be added to

the DC/DC output end and input end to reduce

the noise and ripple. 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

the external capacitor table.

EXTERNAL CAPACITOR TABLE

V in

(VDC)

Cin

(uF)

Vout

(VDC)

Cout

(uF)

5

4.7

5

4.7

12

2.2

9

2.2

24

1

12

1

--

--

15

0.47

It

’s not recommended to connect any external capacitor

in the application field with less than 0.5 watt output。

To get an extremely low ripple, an

“LC” filtering

network may be connected to the input and

output ends of the DC/DC converter, which may

produce a more significant filtering effect. 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 (Figure 1).

Vin

GND

+Vo

0V

DC

C

L

L

DC

L

C

C

-Vo

(Figure 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).

Vin

GND

Vin

GND

REG

+Vout

-Vout

0V

+Vout

DC

DC

DC

DC

REG

REG

0V

-Vout

(Figure2)

No parallel connection or plug and play

.