AC/DC Converter

LH(05-25)-13Bxx Series

2015.03.02-A/1

Page 5 of 6

MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation

EMC solution-recommended circuit PCB layout

Fig 3

Suggestions for safety regulation and wiring width: wire width≥3mm, distance between wires≥6mm, and distance between wire and

ground≥6mm

Element model

Recommended value

Element model

Recommended value

MOV1

S14K350

FC-LX1D

EMC filter

CY1 , CY2

1000pF/400VAC

FUSE

LH05

1A/300V slow fusing, necessary

CX

0.1μF/310VAC

LH10/15

2A/300V slow fusing, necessary

LCM

10mH, recommended to use MORNSUN’s

FL2D-Z5-103

LH20/25

3.15A/300V slow fusing, necessary

LDM

4.7μH/2A

--

--

3. Application of Trim and calculation of Trim resistance

0V

Trim

+Vot

0V

Trim

+Vot

Trim up

Trim down

Applied circuits of Trim (Part in broken line is the interior of models)

Calculation formula of Trim resistance:

up:

a=

Vref

Vot-Vref

R=

T

R-a

2

down:

a=

Vref

Vot-Vref

R=

T

R-a

1

a is a self-defined parameter, with

no real meaning.

Vout

R1(KΩ)R2(KΩ)R3(KΩ)

Vref(V)

Vot(V)

3.3V

3.3

1.98

1

1.24

Output voltage

after regulation,

variation ≤ ±10%

5V

3.3

3.3

1

2.5

9V

7.5

2.87

1

2.5

12V

3.83

1

1

2.5

15V

7.5

1.5

1

2.5

24V

8.66

1

1

2.5

48V

68

3.73

1

2.5

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