AC/DC Converter

LH60-20Bxx(-DT) Series

2015.02.27-A/4

Page 4 of 7

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5V Output

12V Output

24V Output

80

81

82

83

84

85

86

87

88

89

90

90

100

115

150

180

200

230

264

Input Voltage(VAC)

Efficiency Vs Input Voltage(Full Load)

5V Output

12V Output

24V Output

80

81

82

83

84

85

86

87

88

89

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)

C1

C2

TV S

LOAD

FUSE

AC /D C

MO V1

NTC

Fig. 1

Model

C1(μF)

C2(μF)

TVS tube

LH60-20B05(-DT)

1

680

SMBJ7.0A

LH60-20B09(-DT)

470

SMBJ12A

LH60-20B12(-DT)

330

SMBJ20A

LH60-20B15

330

SMBJ20A

LH60-20B24

200

SMBJ30A

LH60-20B48

100

SMBJ64A

Note: Output filtering capacitor C2 is 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. Capacitor withstand voltage derating should be 80% or above. C1 is ceramic

capacitor, which is used to filter high-frequency noise. TVS is a recommended component to protect post-circuits if converter fails. External input FUSE model is

recommended to use 3.15A/250VAC, slow fusing. External input NTC model is recommended to use 5D-9. External input MOV model is recommended to use

S14K350.

2. EMC solution-recommended circuit

AC(N)

AC(L)

LCM

AC(N)

AC(L)

AC/DC

MOV1

MOV2

CX

MOV4

MOV5

R1

CY2

CY1

GDT4

MOV3

+Vo

-Vo

NTC

FUSE

C1

C2

TVS

LOAD

Fig 2

(Output external circuit refer to the typical application circuit)

EMC solution-recommended circuit PCB layout

Fig 3

Note: 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

S20K350

CY2

2.2nF /400VAC

MOV2

S14K350

R1

1MΩ/2W

MOV3

S14K350

LCM

2.2 mH,

recommended to use MORNSUN’s FL2D-30-222;

MOV4

S10K350

GDT4

B5G3600

MOV5

S10K350

NTC

5D-14

CX

0.15μF/300VAC

FUSE

3.15A/250V, slow fusing, necessary

CY1

2.2nF/400VAC

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