PCB Layout for DRV8432DKD Question

Hi,

In my previous post i attach my pcb layout using the Cadnece Orcad PCB layout program version 16.6.

in the lower right hand side I completed the parts placement and routing for the TI DRV8432DKD.

My question is it ok this layout and routing? I try to follow the EVM pcb example but I change the way I route the traces for the outputs of this device.

thanks,

-Steve

here are the electrical schematics for the previous post.

-Steve

Hi Steve

We are not able to import the .brd file. Could you provide a PDF version?

Thanks.

Hi Wilson,

the pdf it produces is of very poor resolution.

what pcb layout program do you use so i could help to convert for your use?

what if i export my design into a .dxf file for you?

-Steve

Hi Steve

Ok. Let's try. I do see that my Altium designer 10 has the import options for both .brd and .dxf. But previous importing of .brd was failed.

Thanks.

Wilson,

i send to you instead some basic screen shots for your review.

the dxf files also were not giving me the level of detail that I wanted for this discussion.

can you tell me what you think of these screen shots?

-Steve

Hi Steve

Not so easy to catch on the pictures. Here are some comments from what I seen.

For schematic, what are the loads? motor or TEC or other things?

Because if motor is driven, we don't need to have the C340,342,344,346.

Also I don't see the big bulk cap nearing PVDD_x, that is a must be with better 470u+.

For the layout, if I catched right, I find the PVDD_B and PVDD_C are just connected to bus line with two small vias. I think that is not matching your design since other power lines look much more strong.

Thanks

Wilson,

the loads are a variety of motors and pistons in a range of 0.5Amp , 3Amp and 6Amps.

yes the C340 etc. dc output caps only placed when i drive pistons and not motors.

i will place the big bulk cap for PVDD and resend screen shots for your review. I also enlarge the PVDD_B,C plane and add more vias as you recommend.

you are saying that this PVDD cap must be larger than 470uf??

-Steve