The UCC2801DG4 is a high-frequency device, and proper layout and placement are crucial for its operation. TI recommends placing the device close to the power stage, using short and wide traces for the power lines, and separating the high-frequency and low-frequency circuits. A good layout practice is to use a star-ground configuration and to minimize the loop area of the power lines.
The choice of resistors for voltage sensing and current sensing depends on the specific application requirements. For voltage sensing, a high-precision resistor with low temperature coefficient is recommended. For current sensing, a low-value resistor with high power rating is recommended. TI provides guidelines for selecting these resistors in the application notes and design guides.
The UCC2801DG4 can operate up to 1 MHz, but the maximum operating frequency depends on the specific application and the design of the power stage. TI recommends following the guidelines in the datasheet and application notes to ensure stable operation at the desired frequency.
The UCC2801DG4 has built-in voltage and current sensing circuits, but these circuits may have errors due to component tolerances and temperature variations. To compensate for these errors, TI recommends using external resistors and capacitors to adjust the sensing circuits, and also using software calibration techniques to trim the errors.
Yes, the UCC2801DG4 can be used in a synchronous rectification topology. In fact, it is designed to work with synchronous rectifiers, and TI provides application notes and design guides for this specific topology. However, the designer must ensure that the synchronous rectifiers are properly selected and designed to work with the UCC2801DG4.
UCC2801DG4 datasheet
by Texas Instruments
