A good PCB layout for the UCC2800DTR involves keeping the high-frequency components (e.g., the transformer, diodes, and capacitors) close together and away from the low-frequency components (e.g., the input and output filters). Use a solid ground plane and keep the power traces short and wide. TI provides a recommended PCB layout in the application note SLUA433.
When selecting a transformer for the UCC2800DTR, consider the input voltage, output voltage, and power rating. Choose a transformer with a turns ratio that matches the input and output voltage requirements. Ensure the transformer's core material and winding configuration can handle the required power and frequency. TI provides a transformer selection guide in the application note SLUA434.
The UCC2800DTR has an operating temperature range of -40°C to 125°C. However, the maximum ambient temperature depends on the specific application and the thermal design of the system. A good thermal design should ensure the junction temperature of the device does not exceed 150°C.
The UCC2800DTR has a built-in overcurrent protection feature. Connect a sense resistor (Rs) in series with the output inductor. The device will detect the voltage across Rs and shut down if it exceeds a certain threshold. The threshold can be adjusted by changing the value of Rs. TI provides more information on overcurrent protection in the application note SLUA435.
While the UCC2800DTR 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. TI recommends consulting the application note SLUA436 for more information on non-isolated topologies.
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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.
