The maximum output power of the TNY380PN is 38W, but it can be derated based on the input voltage, output voltage, and ambient temperature.
To ensure the TNY380PN operates within its SOA, follow the guidelines in the datasheet for input voltage, output voltage, output current, and ambient temperature. 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, ensuring stable operation of the IC.
When selecting a transformer for the TNY380PN, consider the input voltage, output voltage, and power rating. The transformer should be designed to handle the maximum output power of the TNY380PN and provide the required isolation between the input and output.
For optimal performance and reliability, follow the recommended layout and PCB design guidelines in the datasheet, including keeping the input and output stages separate, using a solid ground plane, and minimizing loop areas.