A good PCB layout for the UCC28061D 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 datasheet and application notes.
The inductor value depends on the input voltage, output voltage, and desired switching frequency. A good starting point is to use the inductor selection guide in the datasheet or TI's online inductor selection tool. You can also use the following formula: L = (VIN - VOUT) / (ΔI * f_sw), where ΔI is the desired inductor ripple current.
The maximum junction temperature (Tj) for the UCC28061D is 150°C. It's essential to ensure that the device operates within the recommended temperature range to prevent overheating and ensure reliability.
The UCC28061D has a built-in overcurrent protection (OCP) feature. To implement OCP, connect a sense resistor (Rs) in series with the inductor, and connect the sense resistor to the CS pin. The OCP threshold is set by the voltage on the CS pin, which is proportional to the sense resistor value.
The EN (enable) pin is used to enable or disable the converter. When EN is high, the converter is enabled, and when EN is low, the converter is disabled. You can use the EN pin to implement power sequencing, shutdown, or low-power modes in your design.
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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.
