MORNSUN reserves the copyright

Specifications subject to change without notice.

FB_S-2W

A/1-2008

Page 2 of 2

OUTPUT SPECIFICATIONS

Item

Test conditions

Min

Typ

Max

Units

Output power

0.2

2

W

Line regulation

For Vin change of

±1%

±1.2

%

10% to 100% load(5V output)

10

15

10% to 100% load (9V output)

8.3

15

10% to 100% load (12V output)

6.8

15

Load regulation

10% to 100% load (15V output)

6.3

15

%

Output voltage accuracy

See tolerance envelope graph

Temperature drift

100% full load

0.03

%/

°C

Ripple & Noise*

20MHz Bandwidth

150

250

mVp-p

(5V input)

45

Switching frequency

Full load,

nominal input

(12V/24V input)

50

KHz

*Test ripple and noise by

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

Power Converter section, application notes.

TYPICAL CHARACTERISTICS

(

)

OUTLINE DIMENSIONS & PIN CONNECTIONS

Single Output

FOOTPRINT DETAILS

First Angle Projection

Pin

Function

5

1 2

1

2

5

7

RECOMMENDED FOOTPRINT

diameter:1.00mm(0.039inch)

Note:

Unit:mm(inch)

Pin secti on:0.50*0.30mm(0.020*0.012inch)

Pin diameter tolerances: 0.10mm( 0.004inch)

General tolerances: 0.25mm( 0.010i nch)

1

2

5

7

Vin

GND

0V

+Vo

APPLICATION NOTE

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 (FB_S-1W).

Recommended testing and application 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).

L

Single Output

Vin

GND

+Vo

0V

DC

Cin

L

DC

Cout

(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

greatest capacitance of its filter capacitor sees

(Table 1).

EXTERNAL CAPACITOR TABLE (Table 1)

Vin

(VDC)

Cin

(uF)

Single Vout

(VDC)

Cout

(uF)

5

10

5

10

12

4.7

9

4.7

24

2.2

12

2.2

-

-

15

1

It

’s not recommend to connect any external

capacitor in the application field with less than 0.5

watt output.

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).

S ingle O u tput

Vin

GND

0V

+Vout

DC DC

R EG

REG

(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.