part ii: using pcb layout software – custom component libraries september 24-28, 2012 carol lenk...
TRANSCRIPT
![Page 1: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/1.jpg)
Part II: Using PCB Layout Software – Custom Component Libraries
September 24-28, 2012Carol Lenk
Introduction to Prototyping a LED Driver
![Page 2: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/2.jpg)
What’s in a Component
Board SymbolPad Footprint:
copper, maskReference NameSilkscreen, Document
Board SymbolPad Footprint:
copper, maskReference NameSilkscreen, Document
Schematic SymbolSchematic ShapePins
Schematic SymbolSchematic ShapePins
ComponentConnection between pins
and padsValues, Component height,
Digikey/Mfr part number
ComponentConnection between pins
and padsValues, Component height,
Digikey/Mfr part number
![Page 3: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/3.jpg)
HV9910
• Component not in library.• Package is standard.• Schematic symbol is standard.• Need to make a new Component that uses
existing SO-8 PCB symbol and schematic symbol.
![Page 4: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/4.jpg)
• Library Manager• PCB Symbol Tab• Use All Libraries• Find…• Search for “SO” and 8
pads• Click on 8-SOIC
[prolib]
Find SO-8 PCB Symbol
![Page 5: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/5.jpg)
• Library Manager• Schematic Symbol
Tab• Use All Libraries• Find…• Search for “SO” and 8
pads• Click on FCH-SO8
[fairchild1]
Find SO-8 Schematic Symbol
![Page 6: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/6.jpg)
New Component• Library Manager• Components Tab• New Item…
![Page 7: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/7.jpg)
HV9910• Assign pins 1 to 1• Enter Terminal Name• Save to our custom library
![Page 8: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/8.jpg)
Custom Footprint
• Download datasheet from Digikey.• Find component size and recommended land
pattern.
![Page 9: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/9.jpg)
Create custom PCB Symbol library• Library Manger• PCB Symbols Tab: New Lib… : 9910Demo.psl
Custom PCB Symbol
Copy a 2 pad footprint• In prolib.psl, copy
SMD1 to custom library• Name new pcb symbol
DR1050
![Page 10: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/10.jpg)
Edit Custom PCB Symbol• Library Manager, go to 9910Demo.psl, select DR1050, click Edit• Right click on S (symbol origin) : Origins : Set System Origin at Item• Menu: Units: mm• Double click on pad to bring up Properties
• Change position (center of pad)
4.45
3.65
0.8
4.45
X
![Page 11: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/11.jpg)
• Menu: Settings: Grids: Step Size 0.1mm.• Double click on corners to add chamfer.• Move R reference locator to outside of body• Pads underneath part makes it hard to hand solder.
– Increase pad size by 1 mm.
![Page 12: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/12.jpg)
• Library Manager: Component Tab: New Item
Component Editor• Connect Sch
Terminals to PCB Pads
• Save to custom library
• Add Component to schematic.
![Page 13: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/13.jpg)
MOSFET
![Page 14: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/14.jpg)
MOSFET• Add pad numbers• Add description in Properties window.
![Page 15: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/15.jpg)
• Schematic Symbol– Use Diode-2 in diode.ssl
library
• Need to create custom PCB symbol– Copy pcb symbol “1206”
from sm.psl library.– Name new symbol “SMA”
Diode
![Page 16: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/16.jpg)
Diode PCB Symbol• With line selected, hit “L” to change layers.• Purple items are on Top Document layer to show components.
Layer not printed on PCB.• Yellow items are on Top Silkscreen layer. They are printed on
the PCB.• With line selected, hit “s” to change line style thickness.• For closed shape, use Properties and click on Filled.
![Page 17: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/17.jpg)
Footprint Guidelines
• Reduce production errors.– Alignment, solderability, inspectable.
• IPC Standards.• From datasheets for resistors,
capacitors, etc.• Generally ~ 0.005” wider overall,
0.020” longer on each side.• Hand solderable for prototypes.
![Page 18: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/18.jpg)
![Page 19: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/19.jpg)
How is a PCB Made?1 2
3 4
![Page 20: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/20.jpg)
Looking at a PCB
Pin connector
Green Solder Mask
Copper Trace visible under solder mask
White Silkscreen
Reference Designator on Silkscreen Layer
Tinned Pad
![Page 21: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/21.jpg)
Layers
• Hit “c” to bring up colors.
• In Interaction Bar (Menu: View or F9), Layers Tab is at bottom.
![Page 22: Part II: Using PCB Layout Software – Custom Component Libraries September 24-28, 2012 Carol Lenk Introduction to Prototyping a LED Driver](https://reader036.vdocuments.net/reader036/viewer/2022062802/56649ea25503460f94ba5db4/html5/thumbnails/22.jpg)
Thank You