AC/DC Converter

LH40 Series

2015.03.02-A/3

Page 4 of 7

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LH40-10B05

LH40-10B12

LH40-10B24

80

81

82

83

84

85

86

87

88

89

90

85

90

100

110

150

180

200

230

264

Input Voltage(VAC)

Efficiency Vs Input Voltage(Full Load)

LH40-10B05

LH40-10B12

LH40-10B24

74

76

78

80

82

84

86

88

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

RL

FUSE

AC /D C

MO V

NTC

Fig. 1: LH40-10B**Typical application circuit

FUS E

+Vo

AC(L)

AC(N )

-Vo

AC (N )

COM

C4

C2

C1

C3

RL

TVS 1

TVS 2

RL

AC(L)

MOV

NT C

AC/DC

Fig. 2: LH40-10A**Typical application circuit

Vo 1

C2

C1

+

-

Vo2

TVS1

RL

C4

C3

TVS2

RL

AC(N)

AC(N)

FUSE

AC(L)

AC(L)

+

-

MOV

NTC

AC /DC

Fig. 3: LH40-10D**Typical application circuit

Model

C2(uF)

C4(uF)

C6(uF)

C1, C3, C5（uF）

TVS 1

TVS 2

LH40-10B03

680

--

--

1

SMBJ7.0A

--

LH40-10B05

680

--

--

1

SMBJ7.0A

--

LH40-10B09

330

--

--

1

SMBJ12A

--

LH40-10B12

220

--

--

1

SMBJ20A

--

LH40-10B15

220

--

--

1

SMBJ20A

--

LH40-10B24

120

--

--

1

SMBJ30A

--

LH40-10D0512-13

680

220

--

1SMBJ7.0A

SMBJ20A

LH40-10D0524-06

680

120

--

1SMBJ7.0A

SMBJ30A

LH40-10A05

680

680

--

1SMBJ7.0A

SMBJ7.0A

LH40-10A12

220

220

--

1

SMBJ20A

SMBJ20A

LH40-10A15

220

220

--

1

SMBJ20A

SMBJ20A

Note: Output filtering capacitor C2 is electrolytic capacitor, it is recommended to apply electrolytic capacitor with high frequency and low resistance. For

capacitance and current of capacitor please refer to manufacture’s datasheet. Capacitance 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 S10K300.

2. EMC solution-recommended circuit

AC(N)

AC(L)

LCM

MOV1

R1

CX

MOV2

MOV3

CY1

CY2

AC/DC

FUSE

NTC

AC(N)

AC(L)

+Vo

-Vo

+

TVS

C2

C1

RL

Fig 4 (Output external circuit refer to the typical application circuit)