A good PCB layout for the UCC25600DR involves keeping the high-frequency switching nodes (e.g., SW and VIN) away from sensitive analog nodes, using a solid ground plane, and minimizing loop areas. TI provides a recommended layout in the application note SLUA623.
When selecting a transformer for the UCC25600DR, consider the maximum output power, output voltage, and input voltage. The transformer's turns ratio, magnetizing inductance, and leakage inductance also impact the converter's performance. TI provides a transformer selection guide in the application note SLUA622.
The maximum junction temperature for the UCC25600DR is 150°C. Exceeding this temperature can reduce the device's reliability and lifespan. Ensure proper thermal design and heat sinking to keep the junction temperature within the recommended range.
The UCC25600DR has a built-in overcurrent protection feature. Connect a sense resistor (Rs) in series with the output inductor, and connect the sense resistor's other end to the CS pin. Set the overcurrent threshold by selecting the appropriate Rs value. The device will shut down if the current exceeds the set threshold.
While the UCC25600DR is primarily designed for isolated topologies, it can be used in non-isolated topologies with some modifications. However, this may require additional components and design considerations to ensure safe operation and meet regulatory requirements.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
