Tips for 2 layer PCB

[johnjoejohn]

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.

 

[barry]

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.

 

[andre_luis]

...Is one layer lets say the bottom ground? And the top layer for power and connection of components?...

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...


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[johnjoejohn]

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...


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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

 

[andre_luis]

...wouldn't all the component on top be all connected to power??....

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.


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[marce]

Without at least a schematic we can only guess...
Voltages, current, devices etc etc

 

[Mattylad]

Try to keep tracks to the top so that you can get more ground on the bottom but as said - not at the expense of making them much longer.