Edition: Preliminary / Page 2 of 2

COMMON SPECIFICATION

Output Short Circuit Protection

Continuous

Temperature Rise at Full Load

30

Cooling

Free Air Convection

No-load Power Consumption

100mW (typical)

Operating Temperature Range

-40°C~+85°C

Storage Temperature Range

-55°C ~+125°C

Lead Temperature***

300°C (1.5mm from case for 10 seconds)

（Figure 1)

Vin

GN D

+Vo

0V

DC

C

L

L

DC

L

C

C

-Vo

Vin

GN D

+Vo

0V

DC

C

DC

C

C

-Vo

C

C

Storage Humidity Range

≤ 95%

Case Material

Plastic (UL94-V0)

MTBF

>1,000,000 hours

***Lead Temperature 1.5mm from case for 10 seconds.

TYPICAL CHARECTERISTICS

FOOTPRINT DETAILS

23

9 1011

2322

16 1514

2,3

10,15

14

11

9,16

22,23

GND

NC

+Vo

-Vo

0V

Vin

Pin

WRAP Series

Bottom View

OUTLINE DIMENSIONS & RECOMMENDED FOOTPRINT

23

9 10 11

23 22

1615 14

2 x 2.54

31.80

15.24

2.54

22.86

(Bottom View)

(Side View)

20.30

9.45

0.50

4.00

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)

External Capacitor

Although this series of DC/DC converter can

work without external capacitor, in order to keep

an optimum performance, however, it needs

external capacitor. (See Table 1)

Requirement on Output Load

To ensure this module 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 out put load is not less

should never be operated under no

specified minimum load，the output ripple of this

type of DC/DC converter will increase drastically

and at the same time efficiency & reliability of

the circuit will decrease deeply .If the actual

output power from the load in your circuit is very

small，please connect a resistor with proper

resistance at the output end to in parallel to

increase the load, or use our company’s other

products with a lower rated output power.

The products cannot be used in

parallel and in plug and play.

Vin

5V

&

12V

100uF

24V

&

48V

10uF

100uF

(electrolytic

capacitor)

47uF

(tantalum

capacitor)

Note: All Pins on a 2.54mm pitch; All Pin diameters are 0.50 mm(Tolerance:±0.25); All dimensions in

mm. The dimensions of the WRAP series are correspondent with the WRBP series.

APPLICATION NOTE

MORNSUN Science& Technology Ltd.

Recommended Circuit

All the WRA-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 & 2). If you want to further decrease the input/output ripple, you can increase capacitance

properly or choose capacitors with low ESR. However, the capacitance should not be too high.(See

table 1).If you want to use the products in high EMI, please choose our metal packaged products.

Input Current

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

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Industrial

District,

Guangzhou,

China

Tel :86-20-85571041

Fax:86-20-85536272

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