PD （Power Delivery）protocol is a communication protocol used for fast charging of electronic devices. It allows for higher voltage and current to be delivered through a USB-C cable to charge devices quickly and efficiently.
The PD protocol includes a power negotiation process between the charger and the device being charged. This negotiation determines the maximum amount of power that can be safely delivered to the device, based on its charging capabilities. This negotiation can occur in both directions, allowing for the device to request more or less power depending on its needs.
The maximum power delivery capacity under the PD protocol is determined by the Power Delivery Profile (PDP) being used. These profiles specify the maximum power, voltage, and current that can be delivered. The most common PDPs are 5V/3A, 9V/2A, 12V/2A, 15V/2A, and 20V/2A. This allows for a range of power delivery options depending on the device being charged.
In addition to providing fast charging capabilities, the PD protocol also includes safety features such as over-voltage protection, over-current protection, and over-temperature protection. These safety features ensure that devices are charged safely and do not get damaged in the charging process.
Overall, the PD protocol has become increasingly popular in recent years due to its ability to provide fast and efficient charging to a wide range of electronic devices. More and more devices are incorporating the PD protocol, making it easier for consumers to charge their devices quickly and safely.
