Power integrity basics in PCB Design - Dashboard Guide

Dashboard Mode - Power integrity basics

Goal

Understand how power integrity affects PCB performance by analyzing voltage stability and noise levels across different power rails.

Sample Data

Power Rail	Voltage (V)	Noise (mV)	Current (A)	Frequency (MHz)
VDD_CORE	1.2	15	2.5	100
VDD_IO	3.3	30	1.0	50
VDD_PLL	1.8	10	0.8	200
VDD_MEM	1.5	20	1.8	150
VDD_ANA	2.5	25	0.5	75

Dashboard Components

• KPI Card: Average Voltage
  Formula: Average of Voltage column
  Result: (1.2 + 3.3 + 1.8 + 1.5 + 2.5) / 5 = 2.06 V
• KPI Card: Maximum Noise
  Formula: MAX(Noise)
  Result: 30 mV (from VDD_IO)
• Bar Chart: Noise by Power Rail
  X-axis: Power Rail
  Y-axis: Noise (mV)
  Shows noise levels for each rail to identify noisy rails.
• Line Chart: Voltage and Current by Power Rail
  X-axis: Power Rail
  Y-axis Left: Voltage (V)
  Y-axis Right: Current (A)
  Two lines showing voltage and current trends across rails.
• Table: Full Data View
  Shows all columns for detailed inspection.

Dashboard Layout

+----------------------+----------------------+
| Average Voltage (KPI) | Maximum Noise (KPI)  |
+----------------------+----------------------+
|                      Bar Chart: Noise by Power Rail           |
+--------------------------------------------------------------+
|       Line Chart: Voltage and Current by Power Rail           |
+--------------------------------------------------------------+
|                      Table: Full Data View                    |
+--------------------------------------------------------------+

Interactivity

A filter for selecting specific Power Rails updates all components: KPIs, charts, and table. Selecting one rail shows its voltage, noise, and current details. This helps focus on problem areas.

Self Check

Add a filter to select only the VDD_CORE rail. Which components update and what values do they show?

• Average Voltage KPI shows 1.2 V
• Maximum Noise KPI shows 15 mV
• Bar Chart shows noise only for VDD_CORE
• Line Chart shows voltage 1.2 V and current 2.5 A for VDD_CORE
• Table shows only the VDD_CORE row

Key Result

Dashboard shows voltage, noise, and current metrics for PCB power rails to analyze power integrity.