What should I do if the power cord is too long?

14101603

What should I do if the power cord is too long? [Copy link]

What should I do if the power line is too long? How can I improve the anti-interference ability? Should I put it in the middle layer? Should I put a capacitor? Do I need more of both? How do you deal with it? Is there a better way? Thank you

qwqwqw2088

The power line should be as short and thick as possible. If it is too long, try to make it thicker and wider. "Go through the middle layer?" Does it mean multi-layer board? The power ground line of multi-layer board is usually on the middle layer.

qwqwqw2088

"How to deal with it?" I guess there is no definite answer. The specific circuit needs to be analyzed specifically. The key is whether the power line is sufficient and whether the load current requirement is met. In addition, high voltage, high current signals are completely separated from small current, low voltage weak signals, the digital ground and analog ground of the multilayer board are separated, etc. The decoupling capacitor of the integrated circuit should be as close to the power pin as possible, and the loop formed between the power supply and the ground should be as short as possible, etc.

chunyang

This requires specific analysis of specific issues. It is meaningless to talk about it in general terms.