AC/DC Converter
LH40 Series
Efficiency Vs Input Voltage(Full Load)
Efficiency Vs Output Load(Vin=230VAC)
90
89
88
87
86
85
84
83
82
81
80
90
88
86
84
82
80
78
76
74
LH40-10B24
LH40-10B12
LH40-10B24
LH40-10B12
LH40-10B05
LH40-10B05
85
90
100 110 150 180 200 230 264
Input Voltage(VAC)
10
20
30
40
50
60
70
80
90 100
Output Power Percentage(%)
Design Reference
1. Typical application circuit
NTC
FUSE
MOV
C1 C2 TVS1 RL
NTC
FUSE
AC(L)
AC(L)
AC/DC
+Vo
RL
C1 C2 TVS
AC(L)
AC(L) +Vo
COM
MO V
AC/DC
AC(N )
AC (N)
-Vo
C3
C4 TVS2 RL
AC(N)
-Vo
AC(N)
Fig. 2: LH40-10A**Typical application circuit
C1 C2 TVS1 RL
Fig. 1: LH40-10B**Typical application circuit
NTC
FUSE
AC(L)
+
Vo 1
AC(L)
-
AC /DC
MOV
AC(N)
+
Vo2
AC(N)
-
C3 C4 TVS2 RL
Fig. 3: LH40-10D**Typical application circuit
C1, C3, C5
(uF)
TVS 1
TVS 2
Model
LH40-10B03
LH40-10B05
LH40-10B09
LH40-10B12
LH40-10B15
LH40-10B24
LH40-10D0512-13
LH40-10D0524-06
LH40-10A05
LH40-10A12
LH40-10A15
C2(uF)
680
680
330
220
220
120
680
680
680
220
220
C4(uF)
--
C6(uF)
--
--
--
--
--
--
--
--
--
--
--
1
1
1
1
1
1
1
1
1
1
1
SMBJ7.0A
SMBJ7.0A
SMBJ12A
SMBJ20A
SMBJ20A
SMBJ30A
SMBJ7.0A
SMBJ7.0A
SMBJ7.0A
SMBJ20A
SMBJ20A
--
--
--
--
--
--
--
--
--
--
--
220
120
680
220
220
SMBJ20A
SMBJ30A
SMBJ7.0A
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
NTC
MOV2
FUSE
C1
C2
TVS
RL
AC(L)
AC(L)
+Vo
-Vo
CY1
CY2
+
R1
CX
LCM
AC/DC
MOV1
MOV3
AC(N)
AC(N)
Fig 4 (Output external circuit refer to the typical application circuit)
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