AC/DC Converter

LD05-20Bxx Series

2015.03.18-B/1

Page 3 of 7

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

Product Characteristic Curve

-10

-25

0

55 70

100

50

25

Temperature Derating Cur ve

Ambient Tempe rature( )

℃

70

80

Input Voltage:110~240VAC

140~340VDC

100

80

Input voltage

110

85

264

Input Voltage Derating Curve

20

40

60

50

240

140

100

370

340

VAC

VDC

Note: ①When input 85~110VAC/240~264VAC/100~140VDC/340~370VDC, it need to be voltage derated on basis of temperature derating;

②

This product is suitable for use in natural air cooling environments, if in a closed environment, please contact our company’s FAE.

LD05-20B05

LD05-20B12

LD05-20B24

50

55

60

65

70

75

80

85

90

85

110

180

230

264

Input Voltage(VAC)

Efficiency Vs Input Voltage(Full Load)

LD05-20B05

LD05-20B12

LD05-20B24

50

55

60

65

70

75

80

85

90

10

20

30

40

50

60

70

80

90

100

Output Power Percentage(%)

Efficiency Vs Output Load(Vin=230VAC)

Design Reference

1.

Typical application circuit

AC(L)

+Vo

-Vo

AC ( L)

AC(N)

AC ( N)

C2

C1

FU SE

RL

NT C

+

MOV

Fig. 1

Model

C1(μF)

C2(μF)

LD05-20B03

1

220

LD05-20B05

220

LD05-20B09

100

LD05-20B12

100

LD05-20B15

100

LD05-20B24

47

Note:

Output filtering capacitor C2 is a electrolytic capacitor, it is recommended to use high frequency and low impedance electrolytic capacitor. For

capacitance and current of capacitor please refer to manufacture’s datasheet. Output capacitor withstand voltage derating should be 80% or above. C1is

ceramic capacitor, which is used to filter high-frequency noise. External input NTC is recommended to use 12D-5; External input MOV is recommended to use

S14K350.

2. EMC solution-recommended circuit

ACDC

AC(N)

AC(L)

LCM

MOV CX

CY1

CY2

FUSE

AC(N)

AC(L)

+Vo

-Vo

+

L1

C1

C2

RL

Can use MORNSUN’s FC-LX1D

NTC

Fig 2