Decoupling capacitor placement rules in PCB Design - Dashboard Guide

Dashboard Mode - Decoupling capacitor placement rules

Goal

Understand how different placement rules of decoupling capacitors affect power stability and noise reduction in PCB designs.

Sample Data

Placement Rule	Distance to IC (mm)	Capacitance (uF)	ESR (mOhm)	Noise Reduction (dB)	Power Stability Score
Close to IC power pin	2	0.1	10	20	9
Far from IC (>10mm)	12	0.1	10	5	4
Near ground pin	3	0.1	10	18	8
Multiple capacitors close	2	0.1 + 0.01	10 + 5	25	10
Single large capacitor far	15	1	50	7	5

Dashboard Components

• KPI Card: Best Noise Reduction
  Formula: MAX(Noise Reduction) = 25 dB (Multiple capacitors close)
• KPI Card: Best Power Stability Score
  Formula: MAX(Power Stability Score) = 10 (Multiple capacitors close)
• Bar Chart: Noise Reduction by Placement Rule
  Shows Noise Reduction values for each placement rule
• Bar Chart: Power Stability Score by Placement Rule
  Shows Power Stability Score for each placement rule
• Table: Detailed Placement Data
  Shows all columns from sample data for comparison

Dashboard Layout

+----------------------+----------------------+
|  KPI: Best Noise     |  KPI: Best Power     |
|  Reduction (25 dB)   |  Stability (10)      |
+----------------------+----------------------+
|                      Bar Chart: Noise Reduction             |
|------------------------------------------------------------|
|                      Bar Chart: Power Stability             |
+------------------------------------------------------------+
|                      Table: Detailed Placement Data         |
+------------------------------------------------------------+

Interactivity

A filter dropdown allows selecting specific placement rules. When a rule is selected, the bar charts and table update to show only data for that rule. The KPI cards update if the selected rule has the highest noise reduction or power stability score.

Self Check

If you add a filter to show only "Far from IC (>10mm)" placement, which components update?

• The bar charts update to show noise reduction and power stability only for "Far from IC".
• The table updates to show only the row for "Far from IC".
• The KPI cards update if "Far from IC" has the highest values; otherwise, they show the highest values from the filtered data.

Key Result

Dashboard shows how decoupling capacitor placement rules affect noise reduction and power stability in PCB design.