48 views Yuda Electronic (HK) Technology Co.,Limited. 2021-06-23
Speaking of mobile phone PD fast charging, everyone has experienced it more or less. Now the charging configuration of many Type-C interface mobile phones is almost included in the USB-PD fast charging protocol. So, know what PD fast charge is? What does it have to do with the Type-C interface? Let’s take a look together!
1. What is USB-PD fast charging?
The USB-PD fast charging protocol, the full English name of “USB Power Delivery”, is a fast charging specification formulated by the USB-IF organization, and is one of the current mainstream fast charging protocols. This specification can achieve higher voltage and current, and can deliver up to 100 watts of power, effectively shorten the charging time, and can freely change the direction of power delivery.
2. The relationship between USB-PD fast charging and Type-C
Many people think that having a Type-C interface is equivalent to having PD fast charging, but it is not. The USB-PD fast charge protocol supports Type-C interface output, but not all Type-C interfaces support the USB-PD fast charge protocol.
Type-C is an interface specification that supports positive and negative insertion, and the default maximum support is 15W (5V/3A). However, the Type-C interface has a dedicated communication line, namely CC (channel configure) line, which can transmit USB-PD protocol, which can make the output power support up to 100W (20V/5A); it also supports DRP (dual role port) type The C interface can switch roles between the power supply and the load, thereby supporting two-way power transmission.
3. The relationship between USB-PD fast charging protocol and Apple
Apple is a member of the USB-IF Association and one of the initiators of the USB PD fast charging standard. Apple is an important promoter of USB PD fast charging technology. Many of its iPhones support the 18W PD fast charging protocol.
You Guofen said that the speed of charging his iPhone did not increase. What is wrong with the operation? Here is a supplementary explanation, the conditions for iPhone to realize fast charging:
1. The mobile phone itself must support the PD fast charging function;
2. The charging head must support PD fast charging protocol;
3. The fast charge line must be Apple’s standard Type-C to Lightning line;
The above three items are indispensable. If any one of them is not satisfied, the iPhone cannot achieve fast charging normally.
4. The relationship between USB-PD fast charging and other charging protocols
The USB-PD protocol is not the same relationship with other manufacturers’ fast charging protocols, but the relationship between inclusion and inclusion. In the PPS (Fast Charge Technical Specification) released by USB-IF, the USB-PD 3.0 protocol already includes Qualcomm QC 3.0 and 4.0, Huawei’s SCP and FCP, MTK’s PE3.0 and PE2.0, and OPPO’s VOOC .
With the continuous development of technology in recent years, fast charging has almost become the standard configuration of smart phones. However, since various mobile phone manufacturers mostly adopt proprietary fast charging protocols, many accessories such as charging heads and data cables are not compatible with the fast charging functions of mobile phones. If the mobile phone uses the wrong fast charging accessories, it is actually “slow charging”, and there are even safety risks. Therefore, when we choose fast charging accessories, we must see whether the product supports or is compatible with the fast charging protocol of our mobile phone.
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