HI, TI Team:
1. In the figure, yellow is the UC28063 drive, blue is the inductance input voltage, green is the MOS current, and purple is the input voltage. The two graphs are different positions in a waveform. It can be seen that the conduction time is very different. What I want to consult is the control logic that drives the turn-on time. The tube is not safe if it has a large duty cycle to begin with. You can see that the current is very high.
2, in the light load mode, the specification indicates that the GDA channel will be closed, and only GDB can work normally, so as to achieve light load efficiency; However, according to customer feedback, some chip GDA channels work normally, and GDB channels are closed, which affects the realization of functions.
