Texas Instruments provides a recommended PCB layout in the application note SLUA271, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The transformer selection depends on the specific application requirements, such as output voltage, current, and power level. Texas Instruments provides a transformer selection guide in the application note SLUA272, which includes guidelines for selecting the right transformer and calculating the transformer's turns ratio, inductance, and leakage inductance.
The UCC35705D has an operating temperature range of -40°C to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's essential to ensure proper thermal management and heat sinking to prevent overheating and ensure reliable operation.
The UCC35705D has built-in OVP and UVP circuits, but they can be adjusted or customized using external resistors and capacitors. The application note SLUA273 provides guidelines for implementing OVP and UVP, including calculation of the protection thresholds and timing.
The recommended input capacitor value and type depend on the specific application requirements, such as input voltage, current, and ripple. A general guideline is to use a low-ESR ceramic capacitor with a value of 10uF to 22uF, but the optimal value and type should be determined through simulation and experimentation.
UCC35705D datasheet
by Texas Instruments
