I haven’t made any schematic or layout changes yet. Your project is still empty: 0 components and 0 nets.
You want a fan circuit using:
- 550 DC motor
- Three lithium batteries
- Built-in USB Type-C charger
- IP2326 charging IC
What remains to be done once ACUs are available:
- Confirm battery configuration: 3 cells in parallel 1S3P or 3 cells in series 3S. This is critical because the charger and motor driver design are completely different.
- Check the IP2326 datasheet to confirm whether it supports your battery arrangement and required charge current.
- Add the USB-C input, charger IC, battery protection/power path, motor switch or speed controller, 550 motor connector, fuse/protection, and decoupling.
- Run electrical checks and then proceed to PCB layout.
Important safety note: three lithium cells need proper charging, protection, and balancing if used in series. Do not connect them directly to a charger IC unless the IC is designed for that exact cell configuration.