DRV8301: Recently, we design a two-layer motor drive with separate control part and power part, but when the drv8301 is enabled, noise will appear at the power supply end

Prodigy 70 points

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Part Number: DRV8301

The two boards are connected by row pins. The control board is on the upper layer and the power board is on the lower layer. The power supply voltage waveform before enabling drv8301 is as follows

The power supply voltage waveform after enabling drv8301 is as follows

The power supply we use for testing is the aircraft model battery.

Why is this kind of power supply voltage noise extremely serious?

Regards,

-Beyso

2 Replies