How charging works | step by step

Acer Aspire A315 No Power due to broken charging IC in this video, I already replace the charging ic but the information regarding the voltage signal coming out from those pins is indicated in my videos, so hope you enjoy it and pls guys share this so anyone can learn more. BQ725A (Charger IC) Pins Voltage Value 1. 19v (ACN) 2. 19V (ACP) 3. 19V (CMSRC) 4. 24V (ACDRV) 5. 3.2V (ACOK) 6. 2.5V (ACDET) 7. 0.5V (IOUT) 8. 3.2V (SDA) 9. 3.2V M (SCL) 10. 0.7V (ILIM) 11. 8.2V (BATDRV) 12. 8.2V (SRN) 13. 8.2V (SRP) 14. GND 15. 0V - 3V (LODRV) 16. 6V (REGN) 17. 14V (BST) 18. 10V (HDRV) 19. 8.4V (PHASE) 20. 19V (VCC)