A good PCB layout for the UCC39002D involves keeping the input and output stages separate, using a star-ground configuration, and placing the input filter components close to the IC. Additionally, using a solid ground plane and minimizing trace lengths can help reduce EMI.
The choice of input filter components depends on the specific application requirements, such as the input voltage range, output voltage, and desired ripple rejection. A good starting point is to use the recommended component values in the datasheet, and then adjust them based on simulation and experimentation.
The UCC39002D is capable of delivering up to 2A of output current, but this may be limited by the external components, such as the inductor and output capacitor, as well as the thermal design of the PCB.
To ensure stability, it's essential to follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, using a compensation network, such as a type-2 compensator, can help stabilize the converter. Simulation tools, such as SPICE, can also be used to verify the design.
The UCC39002D has a maximum junction temperature of 150°C, so it's essential to ensure good thermal conduction from the IC to the PCB and then to a heat sink or other thermal management system. A thermal pad on the IC and a solid ground plane can help with heat dissipation.
UCC39002D datasheet
by Texas Instruments
