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3ACFEW_3 – Rev. 2020-1.1

Specifications subject to change without notice.

3Watt - AC-DC converter

3ACFEW_3 series

Electromagnetic Compatibility Solution-Recommended Circuit

recommended circuit 1

1. Application circuit 1—Basic application

Application environmental

Ambient temperature range

Immunity CLASS

Emissions CLASS

Basic application

-40°C to +85°C

CLASS III

CLASS A

FUSE (required)

1A/300V, slow-blow

R1 (required)

12Ω/3W

LDM

4.7mH/Max: 15Ω/Min: 0.2A

recommended circuit 2

2. Application circuit 2—Indoor civil / Universal system recommended circuits for general environment

Application environmental

Ambient temperature range

Immunity CLASS

Emissions CLASS

Indoor civil /general

-25°C to +55°C

CLASS III

CLASS B

Component

Recommended value

R1 (required)

12Ω/3W

LDM

1.2mH/Max: 4.0Ω/Min: 0.2A

CX

0.1μF/310VAC

FUSE (required)

1A/300V, slow-blow

Note

1: In the home appliance application environment, the two Y capacitors of the primary and secondary need to be externally connected

(CY1/CY2, value at 2.2nF/250VAC), which can meet the EN60335 certification.

2: According to the certification requirements, the X capacitor needs to be connected in parallel with the bleeder resistance, the

recommended resistance value is less than 3.8MΩ, and the actual need to be selected according to the certification standard.