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All colleagues unite and focus their efforts to write a new chapter of developmentWhat is the PD charger protocol, and what are its advantages?
所属分类： Industry News
发布时间：2020-05-12
PD charging The protocol is the Power Delivery standard published by the USB‑IF organization. It enables the Type‑C interface, which currently defaults to a maximum power of 5 V/2 A, to deliver up to 100 W. Meanwhile, Google has announced that smartphones running Android 7.0 or later must support the PD protocol for fast charging, with the aim of standardizing the fast‑charging market.
The relationship between USB PD and Type-C
USB Power Delivery (USB-PD) is one of the leading fast-charging protocols today. It is a fast‑charging standard developed by the USB Implementers Forum (USB‑IF). USB‑PD enhances power delivery over USB cables and connectors, extending the cable‑bus power‑supply capabilities of USB‑based applications. This specification supports higher voltages and currents, with power delivery up to 100 watts, and allows for flexible bidirectional power flow.
The relationship between USB‑PD and Type‑C. People often discuss USB‑PD and Type‑C together, and some even refer to a Type‑C charger as a PD charger. In fact, USB‑PD and Type‑C are distinct concepts: USB‑PD is a fast‑charging protocol, while Type‑C is a new connector standard. By default, the Type‑C interface supports up to 5 V/3 A, but once the USB‑PD protocol is implemented, it can deliver power at rates of up to the previously mentioned 100 W. That’s why many devices equipped with a Type‑C port now also support the USB‑PD protocol.
The development prospects of USB Power Delivery. USB PD has now evolved to version 3.0. With Google’s backing, USB PD has integrated Qualcomm’s Quick Charge protocol and gained support from China’s Ministry of Industry and Information Technology, positioning it to soon standardize the currently fragmented fast‑charging market.
Advantages of the PD Fast-Charging Protocol
PD stands for Power Delivery and focuses on the power‑transfer process between two or more devices, or even within a USB‑based smart grid. This power transfer can be bidirectional and may support networked operation, enabling system‑level power‑management strategies. In contrast, QC—short for Quick Charge—is concerned solely with fast charging; its power transfer is unidirectional, lacks networking capabilities, and does not support functions beyond power delivery.
At present, devices that support the PD protocol remain relatively few—known examples include Apple’s new MacBook, several high-end models from Meizu and HTC, and Google’s Chromebook, among others. However, this nascent trend is gaining momentum and could soon spread widely. In China, too, a growing number of manufacturers have begun offering PD‑compatible chargers, such as the ORICO TSM‑1U charger I recently acquired. The ORICO TSM‑1U features a pristine white PC‑material casing with an overall square‑ish profile. Its two‑section design incorporates mostly smooth surfaces, while the area near the plug is finished with a matte texture to enhance grip and make plugging and unplugging easier. Meanwhile, the smooth sections help resist dirt and elevate the product’s aesthetic appeal.