AC/DC Converter

LNxx-12Bxx Series

2014.12.11-A/1

Page 4 of 5

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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. If operation voltage of the module is lower than 165VAC, then need external capacitorC3, C3

can use film capacitors or electrolytic capacitor. If C3 use electrolytic capacitors, when the film capacitors is under 120HZ, require the LN03-12Bxxseries

corresponding ripple current rating must be greater than 80mA, the LN02-12Bxx series must be greater than 40mA, the LN01-12Bxx series must be greater than

30mA, and the capacitors’ shelf life should more than 5 years.

2. EMC solution-recommended circuit

OUTPUT

N

L

ACDC

C3

+

20

22

AC(N)

AC(L)

LC M

MOV CX

CY1

CY2

FUSE

L1

can use MORNSUN’s FC-LX1D

Fig 2: EMC application 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

Recommended value

MOV

S14K350

CX

0.1μF/275VAC

L1

4.7uH/2.0A

LCM

10mH ~30mH,recommended to use MORNSUN’s FL2D-Z5-103

CY1、CY2

1nF/400VAC

FUSE

2A/250V, slow fusing, necessary

C3

The capacitor is the input voltage range：85VAC~264 VAC

External capacitor, refer to the value in Fig.1

FC-LX1D

2KV/4KV EMC filter

download the Selection Guide of EMC Filter