A good PCB layout for the UCC284DP-5 involves keeping the input and output stages separate, using a star-ground configuration, and placing the IC close to the input capacitors. Additionally, using a ground plane and minimizing trace lengths can help reduce EMI.
The input capacitor should be chosen based on the input voltage, output power, and switching frequency. A general rule of thumb is to use a capacitor with a capacitance value of at least 10uF and a voltage rating of at least 1.5 times the input voltage. X7R or X5R ceramic capacitors are good options.
The UCC284DP-5 can handle output powers up to 100W, but this depends on the input voltage, output voltage, and switching frequency. It's recommended to check the thermal performance and efficiency of the converter to ensure reliable operation.
The output voltage of the UCC284DP-5 can be adjusted by changing the feedback resistors (R1 and R2) or the voltage reference (VREF) pin. The output voltage can be calculated using the formula: VOUT = VREF x (1 + R1/R2).
The soft-start pin (SS) is used to control the output voltage rise time during startup. By connecting a capacitor to the SS pin, the output voltage can be slowly ramped up to the desired level, reducing inrush currents and electromagnetic interference (EMI).
UCC284DP-5 datasheet
by Texas Instruments
