Power System Design Overview

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uet

I want to design a power system that takes input from a solar panel, a rechargeable battery, or USB, with automatic power selection. The system should provide regulated 5V, 3.3V, and 1.8V outputs.
Project Requirements:
  • Inputs:
    • Solar Panel (6V, 2W)
    • USB Power Input (5V)
    • Li-Ion Battery (3.7V, 2000mAh)
  • Power Management:
    • Battery Charger IC (MCP73831 – Charges battery from solar or USB)
    • Power Selection Circuit (Automatically switches between power sources)
  • Voltage Regulation:
    • Boost Converter (MT3608 – Steps battery voltage up to 5V)
    • Buck Converters:
      • 3.3V Regulator (AP7333-33)
      • 1.8V Regulator (AP7333-18)
  • Protection Components:
    • Schottky Diodes (Prevent reverse current)
    • Capacitors (For power stability)
  • Indicators & Outputs:
    • LED Indicators (Charging & Power status)
    • Regulated Outputs: 5V, 3.3V, 1.8V
Can you generate a block diagram showing how these components connect?

flux

Below is the block diagram represented as a Mermaid flowchart:
Diagram



  
    
  
  
    
  




























Solar Panel node_6V node_2W
USB Power node_5V
LiIon Battery 3.7V
MCP73831 Charger
Power Selection Circuit
Boost Converter MT3608
Buck Converter AP7333 33
Buck Converter AP7333 18
Schottky Diodes
Capacitors for Stability
LED Indicators
Regulated Output node_5V
Regulated Output 3.3V
Regulated Output 1.8V
Select main ICs
Component selection
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