TI recommends a 4-layer PCB with a solid ground plane, and placing the UCC38084D close to the input capacitors and output inductors. Additionally, keep the high-frequency components (e.g., switching node, output diode) away from sensitive analog circuits.
Use TI's WEBENCH Power Designer tool to generate a customized compensation network design based on your specific application requirements. Alternatively, follow the guidelines in the datasheet and application notes to manually design the compensation network.
Choose capacitors with low ESR, high ripple current rating, and suitable voltage rating. For input capacitors, consider X7R or X5R dielectrics, while for output capacitors, consider X7R, X5R, or OS-CON dielectrics. Ensure the capacitors are placed close to the UCC38084D to minimize parasitic inductance.
Monitor the device's junction temperature (TJ) and ensure it stays below the maximum rated value (150°C). Use thermal design and layout techniques to minimize thermal resistance, and consider using a heat sink or thermal interface material if necessary.
The UCC38084D has a higher switching frequency (up to 1 MHz) and a more advanced current-mode control architecture compared to the UCC38083D. The UCC38084D also has a more comprehensive set of protection features, including overvoltage protection and undervoltage lockout.
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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.
