A good PCB layout for the UCC21520ADWR 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 to reduce EMI. TI provides a recommended PCB layout in the datasheet and application notes.
When selecting an input capacitor for the UCC21520ADWR, consider the capacitor's voltage rating, capacitance value, ESR, and ripple current rating. A good starting point is a 10-22uF ceramic capacitor with an X7R or X5R dielectric, rated for at least 1.5 times the input voltage. Ensure the capacitor can handle the ripple current and has a low ESR to minimize voltage ripple.
The UCC21520ADWR is rated for operation from -40°C to 125°C. As the ambient temperature increases, the device's performance may degrade, with reduced efficiency, increased power losses, and potential thermal shutdown. Ensure proper thermal design and heat sinking to maintain a safe operating temperature.
The UCC21520ADWR has a built-in OCP feature. To implement OCP, connect a sense resistor (Rs) in series with the output inductor, and set the OCP threshold (Ilim) using an external resistor divider. Choose Rs and Ilim values based on the desired OCP level and output current rating. Ensure the sense resistor is rated for the output current and has a low tolerance to maintain accuracy.
The UCC21520ADWR is a higher-power version of the UCC21510, with a higher switching frequency (up to 2.2 MHz) and a wider input voltage range (4.5-18V). The UCC21520ADWR also has a more advanced feature set, including adjustable soft-start, synchronization, and a power-good output. Choose the UCC21520ADWR for higher-power applications or when advanced features are required.
Trust Checks
This model has been provided by community users.
Community Provided
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
UCC21520ADWR Overview
Use the download button to access the UCC21520ADWR schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like UCC21,
or try a keyword search, such as MOSFET Drivers
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.
