1. Difficulties in Quick Charing
Problem:
- Heat generation
- Battery health
- Material limitation
- Voltage Saturation
- Current distribution
Solution: dynamic and adaptive charging
- Adaptive voltage
- Dual battery cell
- Cooling cable
- Management
2. How USB Extension Works
Break down
- Hub controller, handle communication between devices and host
- Manage data traffic
- Manage power distribution
- Bandwidth management
Power Provide
- USB 1.0, 2.0: 5V 500mA=2.5W
- USB 3.x: 5V 900mA=4.5W
- USB Type-C: 5V/9V/15V 3A=15/27/45W or 20V/5A=100W
Requirement：
- Flash disk: 100mA
- Mouse: 25-100mA
- HardDrive: 500-1000mA
- Webcam: 100-500mA
- Speaker: 100-500mA
- Printer: 500-1500mA