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How to realize Fast charging with Type-C Interface

2025-01-18 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >

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It is believed that many inexperienced people have no idea about how to realize fast charging with Type-C interface. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

The flagship Android smartphone began to popularize the charging interface of the Type-C interface, which combined with the fast charging protocol can realize the fast charging of the phone, with charging power ranging from 10W to 18W, and even 65W fast charging by some manufacturers. This greatly improves the charging efficiency. The history of charging for 8 hours or even 12 hours is gone, and the emergence of fast charging facilitates people's experience of using the phone. How does Type-C realize fast charging?

The following reasons are shared with you from the two aspects of Type-C and fast charging agreement.

1 the MicroUSB interface is defined before Type-C, and the commonly used interface is microUSB, which has five pins, but only four are used, namely VCC, GND, D+ and D -. D+ and D-are used to transmit data, while VCC and GND are used to charge. Due to the influence of the line, they are unable to transmit large current. The following figure shows the definition of the MicroUSB interface.

Therefore, the MicroUSB interface can not achieve high current charging, so it can not achieve fast charging. 2 Type-C hardware interface defines that the most direct understanding of Type-C is that there is no need to distinguish the direction of the plug when charging. In addition, careful friends may notice that Type-C has more pins, as shown below is the pin interface definition of Type-C.

As can be seen from the figure, the interface has four pairs of power lines, and Type-C supports the charging specification of 5V/3A by default in hardware. With the support of charging protocol, the theoretical maximum output power can reach 100W, which shows the advantage of Type-C over MicroUSB. So how to achieve high-power charging with Type-C interface? This requires the support of the agreement. 3Quick charging protocol USB-PDUSB-PD is the name of a protocol, its full name in English is USB- Power Delivery, abbreviated as USB-PD, it is one of the most widely used, widely used and mainstream fast charging protocols at present. This protocol has the formulation and specification of USB-IF resistance. It is with USB-PD,Type-C that high-power charging can be realized and mobile phone fast charging can be realized. The implementation of the protocol is very troublesome, but fortunately the semiconductor company has made the USB-PD protocol into a chip. The chip can be used when designing the circuit, but this requires a successful handshake between the charger and the mobile phone, that is, confirm the fast charging function and abide by the fast charging agreement with each other, and then start fast charging. The fast charging chip of USB-PD protocol needs to be certified by USB-IF. In addition to PD, QC and PPS are commonly used fast charging protocols. These three fast charging protocols are the current mainstream fast charging protocols, all of which need to be implemented through the corresponding fast charging protocol chips. 4 the principle design of the fast charger now the mobile phone charger is made very much like a work of art, not only small in size and beautiful in appearance, but no longer the black and stupid fool of the previous functional machine era. Mobile phone charger can change alternating current into direct current, which will inevitably involve the process of voltage conversion and rectification, but how to do it in a small volume? The first thing to do is to reduce the volume of the transformer, and the current mobile phone charger uses a high-frequency transformer, small size and high efficiency, which is the premise of small size of the charger. In addition, PWM control chip, synchronous rectifier chip and fast charging protocol chip are also needed. Therefore, a complete mobile phone charger that supports fast charging includes the following parts: rectifier (rectifier bridge implementation), high frequency transformer, synchronous rectifier chip, PWM controller, fast charge protocol (USB-PD, QC, PPS, etc.) chip and Type-C interface. After reading the above, have you mastered the method of how to realize fast charging with Type-C interface? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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