Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the high-frequency components (such as the transformer and switching FETs) close to the IC. Additionally, use a shielded inductor and keep the output voltage traces away from the input voltage traces.
To ensure stability, make sure to follow the recommended component values and PCB layout. Also, ensure that the output voltage is properly decoupled with a capacitor, and the feedback network is properly compensated. Additionally, check that the input voltage is within the recommended range and the output current is within the specified limits.
The maximum junction temperature of the UCC2570N is 150°C. However, it's recommended to keep the junction temperature below 125°C for reliable operation and to ensure the device meets its specifications.
Yes, the UCC2570N can be used in a synchronous rectification topology. However, it's essential to ensure that the synchronous rectifier FETs are properly driven and the dead-time is set correctly to avoid shoot-through currents.
To troubleshoot issues with the UCC2570N, start by checking the input voltage, output voltage, and current. Use an oscilloscope to check the waveforms and ensure they are within the expected ranges. Check the component values and PCB layout against the recommended design. Also, ensure that the device is properly decoupled and the feedback network is properly compensated.
UCC2570N datasheet
by Texas Instruments
