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

Specifications subject to change without notice.

LS03-05BXXKC

A/3-2012

Page 3 of 4

STRUCTURE FIGURE

DC/DC

Conv ertor

+Vin( L)

-Vin( N)

+

C1

E xter nal

Capa citor

12

7

10

1

3

Rectific ate

Contrl

Cir c uit

Feedback

loop

Vo ltage

sam pling

Rec tifier

filter

c irc uit

+Vo

- Vo

TYPICAL APPLICATIONS

C2 C3

7

+Vo

-Vo

TVS RL

3

1

L

N

C1

+

10

+

CY

12

FUSE

NTC

MOV

L

N

+ Vo

-Vo

AC-DC

L

N

+Vo

-Vo

Figure 1：LS03-05BXXKC

Figure 2：Note: This application is not supported for this series.

OU TPUT

N

L

N

L

PE

LCM

MOV

R2

R1

R3

CX

C Y3

C Y4

A CDC

C Y1

C Y2

C1

+

10

CY

LDM

can use M OR N S UN

’s FC -L01D

FU SE

Figure 3：LS03 series Recommended circuit for application require higher EMC standard

(external circuit output same as above)

Figure 4：EMC application circuit PCB layout

Safety and recommend wiring: linewidth A≥3mm,C≥9mm

EXTERNAL CAPACITORS TYPICAL VALUE

Output Voltage

C1

C2

C3

FUSE

TVS

5V

SMBJ7.0A

12V

10

μF/400V

1

μF/50V

(Ceramic Capacitor)

150

μF/25V

1A/250V

SMBJ20A

Note:

For standard EMC requirement, please refer to figure 1 , if higher EMC requirement ,please refer to figure 3.

1.

C1:AC input, is filtering electrolytic capacitor (which is required), when input voltage is below 100VAC, and the value of C1 is 22

μF/400V.

DC input, is a filtering capacitor in EMC Filter, the value of C1 is 10

µF/400V(when input voltage is above 370VDC, and the value of C1 is 10µF/450V), If

EMC performance is not required,C1 could not need.

2.

C2 is ceramic capacitor, it is used to filter high frequency noise. Output filtering capacitor C3 (which is required when AC input or DC input) is recommended to

use high frequency and low impedance electrolytic capacitors. For capacitance and current of capacitor please refer to manufacture

’s datasheet. Voltage

derating of capacitor should be 80% or above. TVS is a recommended component to protect post-circuits (if converter fails).

3.

MOV: Varistor,

model: 561KD14，it is used to protect the device under surge;

R1 、R2：2

Ω/3W；

R3：1M

Ω/2W；

CY、CY1、CY2、CY3、CY4：102M/400VAC；

CX：0.22

µF/275VAC；

LCM：10mH-30mH；

LDM：300

µH；

FC-L01D：MORNSUN

’s 2KV/4KV Surge protector.

4.

FUSE：1A/250V Slow-Blow