The classification and uses of USB chargers are as follows:
Classification by interface type:
USB-A charging head: Traditional USB interface, the output end is a rectangular interface, widely used for ordinary 5V charging, suitable for most mobile phones, tablets and other devices.
USB-B charging head: Commonly found in printers, scanners, external hard drives and other devices.
USB-C charging head: A new generation of USB interface that supports higher current and voltage. It is common in fast charging heads and is widely used in Android phones, tablets, notebooks and other devices.
Lightning charging head: Mainly used for charging heads for Apple devices, such as iPhone and iPad, some support fast charging.
Classification by charging power:
5W charging head: Lower power, usually used for slow charging of small devices or older smartphones.
18W charging head: Suitable for some devices that support fast charging, such as iPhone and some Android devices, it can significantly increase the charging speed.
20W-30W charging head: Supports fast charging and is suitable for most smartphones and tablet devices, such as iPhone 12 and later models.
45W-65W charging head: High-power fast charging head, suitable for laptops, tablets and mobile phones that support high-power fast charging.
100W and above charging heads: Mainly used for high-performance notebooks, supporting higher current and voltage requirements.
Classification by charging protocol:
Normal USB charging protocol: Provides a standard voltage of 5V, suitable for most low-power devices.
QC (Quick Charge) protocol: Launched by Qualcomm, it is suitable for devices that support QC. It has fast charging speed and supports multiple voltages.
PD (Power Delivery) protocol: The mainstream fast charging protocol for USBC interface, supports higher power, and is suitable for mobile phones, tablets, notebooks, etc..
PPS (Programmable Power Supply) protocol: an extension of the PD protocol that supports more flexible voltage and current regulation.
Classification by function:
Single-port charging head: There is only one charging port, suitable for charging a single device.
Multi-port charging head: It has multiple USB interfaces or USBC interfaces and supports charging multiple devices at the same time.
Smart charging head: Equipped with a smart chip, it can automatically identify the device and match the optimal charging current to ensure charging efficiency and safety.
Gallium Nitride (GaN) charging head: Made of gallium nitride material, it is smaller and lighter than traditional charging heads, has good heat dissipation performance and higher power.
Classified by brand and specificity:
Brand-specific charging heads: Special charging heads launched by manufacturers such as Apple, Samsung, and Xiaomi have good compatibility with their own devices and support unique fast charging protocols.
Universal charging head: Suitable for devices of many brands, but may not support some specific fast charging protocols.
