"QC and PD" refer to two distinct fast-charging technologies used in electronic devices:

QC (Qualcomm Quick Charge):

A proprietary fast-charging standard developed by Qualcomm, primarily for devices using Snapdragon processors.

Versions (e.g., QC 2.0, 3.0, 4+) offer increasing power delivery, with later versions supporting up to 100W.

Dynamically adjusts voltage (up to 20V) and current to optimize charging speed and efficiency.

Commonly found in smartphones, tablets, and accessories compatible with Qualcomm chipsets.

PD (USB Power Delivery):

A universal fast-charging standard by the USB Implementers Forum (USB-IF), designed for broader compatibility.

Supports up to 100W (20V at 5A) via USB-C, enabling charging for laptops, monitors, and high-power devices.

Uses smart negotiation between device and charger to deliver optimal power levels.

Widely adopted across brands and devices, including Apple, Google, and Microsoft products.

Key Differences:

Compatibility: QC is tied to Qualcomm hardware, while PD is a cross-brand standard.

Versatility: PD is mandatory for USB-C laptop charging, whereas QC focuses on mobile devices.

Integration: Newer QC versions (e.g., QC 4+) are compatible with PD, allowing dual support in some devices.

Practical Use: Devices supporting both standards can leverage faster charging from QC or PD chargers, enhancing flexibility. However, maximum speeds depend on the specific charger-device pairing and compatibility.

Tag：QC,PD,Charging