I want to design a multi-source power management system that can automatically select between input sources—solar panel, rechargeable battery, or USB—and deliver regulated outputs of 5V, 3.3V, and 1.8V.
Project RequirementsPower Inputs
Solar Panel: 6V, 2W
USB: 5V standard input
Li-Ion Battery: 3.7V, 2000mAh
Power Management
Charger IC: MCP73831 (handles charging from USB or solar)
Power Selection Circuit: Automatically switches between power sources based on availability
Voltage Regulation
Boost Converter: MT3608 (boosts battery voltage to 5V)
Buck Converters:
AP7333-33 for 3.3V output
AP7333-18 for 1.8V output
Protection & Stability
Schottky Diodes: Prevent reverse current flow
Capacitors: Stabilize voltage and reduce ripple
Indicators & Outputs
LED Indicators: Show charging and power status
Regulated Output Rails: 5V, 3.3V, 1.8V
Request
Can you generate a block diagram showing how these components are interconnected?
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
General Purpose Thick Film Standard Power
and High-Power Chip Resistor
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
Features:
- RMCF – standard power ratings
- RMCP – high power ratings
- Nickel barrier terminations standard
- Power derating from 100% at 70ºC to zero at +155ºC
- RoHS compliant, REACH compliant, and halogen free
- AEC-Q200 compliant