The maximum output power of TNY254G depends on the input voltage, output voltage, and the transformer design. However, Power Integrations recommends a maximum output power of 25 W for universal input (85-265 VAC) and 15 W for high-line input (180-265 VAC).
To ensure that the TNY254G operates within the specified temperature range, it is essential to provide adequate heat sinking and thermal management. The device should be mounted on a PCB with a sufficient copper area to dissipate heat, and the ambient temperature should be kept below 85°C.
The recommended layout and placement for the TNY254G involves keeping the high-voltage components (such as the transformer and input capacitors) away from the low-voltage components (such as the output capacitors and feedback circuitry). Additionally, the device should be placed near the input capacitors to minimize the length of the high-voltage traces.
To troubleshoot issues with the TNY254G, start by checking the input voltage, output voltage, and current. Verify that the transformer is properly wound and connected, and that the feedback circuitry is correctly configured. Check for any signs of overheating, and ensure that the device is properly soldered and mounted on the PCB.
The TNY254G is designed for low-power applications and has a limited peak current capability. If your design requires high-peak currents, you may need to consider using a different device or adding external current-limiting components to prevent damage to the TNY254G.
TNY254G datasheet
by Power Integrations
