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

Beyso

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

over 4 years ago

0 Adam Sidelsky over 4 years ago

TI__Guru 62730 points

Beyso,

Thanks for posting on the MD forum!

Can you share your schematic?

Regards,

-Adam

0 Beyso over 4 years ago in reply to Adam Sidelsky

Prodigy 120 points

Adam,

This is the schematic of the control part

This is the schematic of the power part

Regards,

-Beyso

0 Adam Sidelsky over 4 years ago in reply to Beyso

TI__Guru 62730 points

Beyso,

Please show us how DCBUS is connected to BAT+ and how BAT- is connected to the control GND.

If you can share pictures of the assembled boards and the layout it could really help us debug this.

Regards,

-Adam

Motor drivers

Motor drivers forum

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