Hello TI team
I encountered several problems during the testing process. The first is that the chip will have abnormal waveforms when operating at 300kHz, and the gate oscillation is obvious. The second is that the maximum load current 20A cannot be reached. The last one is the intermittent rest of the chip when it is unloaded.
Hope you can give some good solutions, thank you very much.
I have done according to the datasheet, but there will still be concussion problems, what other possible reasons
I really need your help,thanks
Hello, this is a designed circuit, drawn according to the datasheet. The PCB is also designed according to the datasheet, with the MOS inductor on top and the chip on the back.
Besides LAYOUT, are there any other possible causes for these phenomena？
At 300kHz, large and small waves appear, and the other frequencies are only the gate oscillation is more obvious. The anomaly in no-load is that the waveform has a radian after power-on, and then the waveform disappears for a period of time, but during this period the output is still normal, as if the chip is working intermittently. In addition, even 0.1A load current will lead to abnormal output and waveform disorder.
