LB05-10B03LT Datasheet, PDF (5/7 Pages) MORNSUN Science& Technology Ltd. – AC/DC Converter

AC/DC Converter
LB(05-25)-10BxxLT Series
2. EMC solution-recommended circuit
AC( L)
FUSE
Can use MORNSUN's FC-LX1D
LDM
LCM
MOV1 CX
CY1
CY2
AC( N)
AC( L)
+Vo
ACDC
-Vo
AC( N)
C1
C2
TVS1 RL
+
Fig. 2: EMC Recommended circuit with higher requirements
Fig.3: Recommended EMC circuit-PCB layout
Suggestions for safety regulation and wiring width: wire width ≥3mm, distance between wires ≥6mm, and distance between wire and
ground ≥6mm
Element model
MOV1
CY1 , CY2
CX
LCM
LDM
Recommended value
S14K350
1000pF/400VAC
0.1μF/275VAC
10mH, recommended to use
MORNSUN’s FL2D-Z5-103
5uH
Element model
FC-LX1D
FUSE
--
LB05
LB10/15
LB20/25
--
Recommended value
2KV/4KV EMC filter
1A/250V slow fusing, necessary
2A/250V slow fusing, necessary
3.15A/250V slow fusing, necessary
--
3. Application of Trim and calculation of Trim resistance
+Vot
+Vot
R1
Vref ^R3
R2
RT
Tri m
R1
R3
Vref
R2
RT
Tri m
0V
0V
Trim up
Trim down
Applied circuits of Trim (Part in broken line is the interior of models)
Calculation formula of Trim resistance:
up: RT=
aR2
R2-a
-R3
down: RT=
aR1
R1-a
-R3
Vr e f
a=
Vot- Vref
R1
a= ^Vot-Vref
Vr e f
R2
RT is Trim resistance;
a is a self-defined parameter, with
no real meaning.
2014.06.23-A/0
Page 5 of 7
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