Author Topic: Creating Switch Converter Layouts in Eagle?  (Read 494 times)

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Offline LabSpokane

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Creating Switch Converter Layouts in Eagle?
« on: September 27, 2016, 03:58:39 PM »
What's the best method to create the pad layout for a switch converter?  I'm a bit stumped on how to create recommended pad layout in the data sheet.  (Attached)

Do I just create rectangles manually on the top copper layer?  If I want solder mask, is that another layer of manually-created rectangles?

Thanks!
 

Offline jct

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Re: Creating Switch Converter Layouts in Eagle?
« Reply #1 on: September 27, 2016, 04:26:27 PM »
If I understand your questions correctly: Use the Polygon function during layout instead of the Route function and name it exactly the same as the allocated Signal name. Pads are done when you setup/create Package (footprint) in your Library. Solder mask is automatically created when you use the Cam Processor function.
Pain is temporary, giving up is forever.
 

Offline LabSpokane

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Re: Creating Switch Converter Layouts in Eagle?
« Reply #2 on: September 28, 2016, 01:12:02 AM »
Thanks. I just realized tha I was trying to name the polygon to the IC pad name not the signal name.  :palm:

Will give it another whirl here shortly.
 

Offline jgarc063

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Re: Creating Switch Converter Layouts in Eagle?
« Reply #3 on: September 28, 2016, 01:47:01 AM »
What's the best method to create the pad layout for a switch converter?  I'm a bit stumped on how to create recommended pad layout in the data sheet.  (Attached)

Do I just create rectangles manually on the top copper layer?  If I want solder mask, is that another layer of manually-created rectangles?

Thanks!

Hi LabSpokane,

I hope you're doing well. In the newest versions of EAGLE the recommended approach is to use the arbitrary pad shapes feature. Basically for the thermal pad in the middle you place through hole pads for the thermal vias. Then you draw the main copper pad using a polygon on the top layer. You will also have to draw the stopmask and cream openings manually also using the polygon command.

When you go to connect this package to a symbol in the device editor assign all of the thermal pads to the same pin. In the connect column you'll see a small icon, if you hover over it you'll see the word all. Click it to change it to any. When it is set to all, all of the thermal pads will get airwires. If you set it to any then as long as one pad gets connected then EAGLE will be happy.

See section 8.14 of the EAGLE manual for more details on this process.

Please let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia
Autodesk Support
 

Offline LabSpokane

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Re: Creating Switch Converter Layouts in Eagle?
« Reply #4 on: September 28, 2016, 02:07:28 AM »
What's the best method to create the pad layout for a switch converter?  I'm a bit stumped on how to create recommended pad layout in the data sheet.  (Attached)

Do I just create rectangles manually on the top copper layer?  If I want solder mask, is that another layer of manually-created rectangles?

Thanks!

Hi LabSpokane,

I hope you're doing well. In the newest versions of EAGLE the recommended approach is to use the arbitrary pad shapes feature. Basically for the thermal pad in the middle you place through hole pads for the thermal vias. Then you draw the main copper pad using a polygon on the top layer. You will also have to draw the stopmask and cream openings manually also using the polygon command.

When you go to connect this package to a symbol in the device editor assign all of the thermal pads to the same pin. In the connect column you'll see a small icon, if you hover over it you'll see the word all. Click it to change it to any. When it is set to all, all of the thermal pads will get airwires. If you set it to any then as long as one pad gets connected then EAGLE will be happy.

See section 8.14 of the EAGLE manual for more details on this process.

Please let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia
Autodesk Support

Hi Jorge,

I'm doing great now, because that is exactly what I needed to know. Thank you! I really appreciate you surfing the forum.  :-+
 


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