WEEK 7 CHALLENGE - SATURN PCB TOOL

• Using the following values to get 1 amp of via current
  • 8mm via height,
  • 20 degree temperature rise
  • FR-4 material

Tune rest of the values such as hole and PAD diameter, plating thickness etc.

• Calculate differential pair width and spacing for a differential of 100ohm where
  • Target diff is 100 ohm and 10% tolerance
  • The conductor height is 0.2362mm
  • Base copper is 35um and "Edge cpld Ext" layer is selected

Tune other values such as conductor width and spacing to get 100ohm impedance

AIM :
1.To obtain 1amp of via current using the given measurements.
2.To calculate differential pair width and spacing for 100 ohm impedance.

PROCEDURE:

1.Via current

Given: 0.8mm height, 20degree temperature rise & FR-4 material.
Required: 1amp via current.

At first open the saturn pcb toolkit and choose the via properties option in it.



Change the unit into metric.




Then enter the given values in the respective areas.



Now select the solve option so, we get 1.4210amps.



To get the desired result we need to tune the remainings like hole diameter, internal pad diameter & plating thickness.
we can reduce the hole diameter with an range of 0.5mm so we stepped down from 2.5 to 2mm in the initial stage.
The changes in the internal pad diameter does not make any notable changes in the via current so the values are left unaltered.
Finally by tuning the plating thickness to 0.15223mm we can get the desired via current of 1amp.

2.Differential pair

Given:Target diff 100 ohm, 10% tolerance, conductor height 0.2362mm, base copper 35um and layer is edge cpld Ext.
Required:100 ohm impedance.

In the saturn pcb toolkit choose the differential pair.
change the unit into metric and base copper into 35um.
Then enter the given values in the respective areas.
To get the desired result we need to tune the conductor width and spacing.
By keeping the conductor width as same and changing the spacing to 0.300mm we can get the required differential.

RESULT:

1.1amp of via current is obtained.
2.Differential pair width and spacing is obtained for 100ohm impedance