Tips for 2 layer PCB

Status
Not open for further replies.
J

johnjoejohn

Junior Member level 2
Joined
Jan 3, 2014
Messages
21
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Visit site
Activity points
164
I am making a 2 layer PCB for a motor driver, whats the typical layout for a 2 layer pcb?
Is one layer lets say the bottom ground? And the top layer for power and connection of components? Or how should I do this, the expected current draw will be around 15+ amps continuous.
 

Is this a PWM design? If so, you'll need to pay attention to ground-plane and layout. 15 Amps is a fair amount of current, minimum trace widths should be about 500 mils (12.6mm) If you can have a solid ground plane on the bottom, that would be great, but not at the expense of needing longer traces on the other layer.
 

johnjoejohn said:
...Is one layer lets say the bottom ground? And the top layer for power and connection of components?...
Click to expand...

This is a common practice, but there are a number of other recommendations, including the physical (but not electric) separation of ground planes, greater thickness copper, solder mask removal, etc...


+++
 

andre_teprom said:
This is a common practice, but there are a number of other recommendations, including the physical (but not electric) separation of ground planes, greater thickness copper, solder mask removal, etc...


+++
Click to expand...

Help me understand, for a 2 layer, if bottom is ground and top is power...wouldn't all the component on top be all connected to power??....Guess im confused
 

johnjoejohn said:
...wouldn't all the component on top be all connected to power??....
Click to expand...

I meant that you should spread the ground plane as much as possible along bottom layer, but during routing activity should give priority to power connections, which certainly you can´t succeed restricted just to top layer, having to do on both layers.


+++
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…