LNK454DG footprint, schematic symbol and 3D model by Power Integrations

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LNK454DG Details

The maximum output power of LNK454DG is 4.5W, but it can be derated based on the input voltage, output voltage, and ambient temperature.
To ensure the LNK454DG operates within its SOA, follow the guidelines in the datasheet for input voltage, output voltage, and output current. Also, make sure to provide adequate heat sinking and thermal management.
The BYPASS pin is used to connect a bypass capacitor to the internal voltage regulator. This helps to reduce the noise and ripple on the internal voltage regulator output.
No, the LNK454DG is designed for isolated offline power supplies. It is not suitable for non-isolated offline power supplies due to its internal transformer and safety certifications.
To optimize the design for EMI and EMC compliance, follow the layout guidelines in the datasheet, use a shielded transformer, and add EMI filters as needed. Also, ensure that the PCB layout is optimized for minimal noise radiation.

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