English Views: 0 Author: Site Editor Publish Time: 2022-07-09 Origin: Site
Foreword
Users living in the current era know that the maximum charging power limit of PD 3.0 is 100W, which can no longer meet the development needs of the current era. Since the release of the USB PD 3.1 fast charging standard, it has been added on the basis of the original PD3.0. The three voltages of 28V, 36V, and 48V belong to the extended power range. The maximum output current corresponding to the three voltages is 5A, and the maximum output power can reach 240W.
But in fact, the 100W, 60W and other charging cables we usually talk about are mainly reflected in the current, that is, the cables that support 5A and 3A charging current can only be charged with high power as long as they are equipped with a charger, so the following will mainly be based on current. Introduce the fast charging cable.
Wire form
The charging cable of the USB-C port is the most common fast charging interface on the market, and the USB-C cable mainly has three types: USB-C to USB-C, USB-A to USB-C, and USB-C to Lightning. Type, this article mainly explains two types of USB-C to USB-C, USB-A to USB-C.
3A wire is one of the most widely used wires on the market. The appearance and terminals of the wire are not clearly marked, and there are two specifications of A to C and C to C.
It can be literally understood that the maximum transmission current value is 3A. Generally, the mainstream charging cables on the market are designed and manufactured according to this power specification in terms of contact gold plating, wire core thickness, and cost control, and are based on USB PD3.0. The highest voltage is 20V According to the specification, the maximum fast charging power it can withstand is 60W.
There is basically no difference in the wire cores of the two specifications of the wire, but based on applicability or cost considerations, the price of the C to C wire will be slightly more expensive; and many chargers below 60W have different USB interface specifications. The styles are also different, but basically the 3A wire is standard.
The 5A cable is generally marked with the word "5A" on the outer packaging and the end of the terminal head for easy identification. Based on the USB PD3.0 maximum voltage specification of 20V, the maximum fast charging power it can withstand is 100W.
Based on the "USB Power Delivery" document released by the USB-IF Association, 5A cables must have a built-in 5A E-Marker chip. During the process of "information negotiation" between the power supply equipment and the power receiving device, the key parameter that the cable supports 5A is obtained. Only the charging system can break through the limitation of 3A current transmission.
The same as the 3A charging cable, it also has two specifications, A to C and C to C. Generally speaking, the A to C charging cable is specially designed for charging mobile phones and other devices, and needs to be equipped with a specific charger; while the C to C charging cable is used for charging. The cable generally supports PD fast charging transmission, which can charge mobile phones, tablets and notebook computers, and has a wider applicability.
In addition, users can find that although the wire supports 5A current, the measured current cannot reach 5A or even exceed 3A; this is because some devices use a private fast charging protocol, and both the cable and the charger encrypt the communication content. This kind of equipment can only be purchased Their own fast charging cables.
The charging cable that supports 6A fast charging is basically an advanced version of the wire, and it is basically a customized version of various manufacturers in the current digital accessories market.
This is a gaming phone launched by Nubia: Red Magic 6 Pro, which is equipped with a 120W fast charging system, and comes standard with a 120W fast charging set in the box. The included 120W charger uses a USB-C output interface and supports up to 20V6A 120W output power.
The box comes with a C2C fast charging cable that supports 6A high current. It should be noted that this 6A high current is only for mobile phones. Only when the original 120W charger is used to charge the Red Magic 6 Pro will the 6A high current be triggered. Fast current charging.
This is Redmi's latest gaming phone, which is also equipped with a 120W fast charging system, and a 120W fast charging kit is also included in the box.
Included in the box is an A2C fast charging cable that supports 6A high-current charging. With the 120W USB-A charger, it can provide a fast charging power of up to 20V6A 120W for the Redmi K50 Gaming Edition.
In fact, in addition to the 6A fast charging cable, there is now a fast charging cable that probes the current up to 8A.
This is OPPO's latest flagship model. It is equipped with OPPO 80W SuperVOOC flash charging, and the 80W flash charging kit is also included in the box.
One of the members of the 80W flash charging package is this A2C fast charging cable, which supports 8A high-current transmission, and with an 80W charger, it can provide up to 80W fast charging for OPPO Find X5 Pro.
10A charging cable
Unexpectedly, in the fast charging of digital products, there are already data lines that can transmit up to 10A current.
This is the latest realme GT NEO 3 launched by realme. Its special feature is that the fast charging of the mobile phone is upgraded to 150W. Yes, you heard that right, a full 150W.
In addition, a charging kit that supports 160W fast charging is also included in the box. The type of charging cable is C2C. The 160W charger with USB-C interface can provide up to 150W fast charging power for realme GT NEO 3. I believe it can also be seen that this line supports a large charging current of 10A.
Summary
The topic of this time is what is the difference between a 240W charging cable and a 120W cable that supports other powers. In fact, the 240W, 120W, etc. that we talk about in daily life are actually a kind of charging technology. Only when the technology is applied to the wire itself can it play its value.
The 240W fast charging technology is the latest fast charging technology launched by the USB IF organization, which is now the more popular PD3.1 fast charging technology. It has raised the power limit of PD3.0, which has always been 100W, making it capable of charging gaming laptops. At present, the cables that support the PD fast charging protocol are mainly in the form of C2C (USB-C to USB-C), and the same is true for the cables that support 240W fast charging.
What is the difference between the C2C cable that supports 240W fast charging and the cables of other power?
One is the shape. Currently, the type of cable that supports 240W fast charging is still C2C, while some cables that support 120W, 100W, and 60W fast charging have two types, C2C and A2C, and the 240W charging cable sub-end shells are replaced with metal, Made of materials with strong thermal conductivity such as ceramics; and then the USB Association officially opened the 240W EPR Type-C data cable certification, in which EPR stands for "Extended Power Range"; after certification, it has a special Logo, as before The color logo in the lower left corner of the Meizu 240W charging cable package.
The second is the service object. The 240W fast charging line is mainly used to charge large electrical equipment such as laptops. The main difference between 100W, 60W C2C cables and 240W C2C cables is the power support. The 120W, 80W, 135W and other charging powers mentioned above are more for charging mobile phones. Only with specific chargers, the charging power for specific mobile phones will be reached, and the limit is higher.
The third is the internal structure. Although the current remains at 5A, it can reach 50.9V in extreme conditions due to the higher operating voltage. Therefore, the withstand voltage value of power devices such as VBUS capacitors built into the data line needs to be higher than 50.9 V, which is different from the previous 100W standard; and will be produced based on the Type-C v2.1 specification.
In addition, why is the standard current of the 240W charging cable maintained at 5A? There are two main limitations, one is the withstand voltage level of the power device, the other is the level of safety voltage that needs to be considered, and 20% overvoltage needs to be considered in the design; but if the current is increased, it means that the higher the temperature, It will lead to an increase in cost and power consumption; therefore, the cost increase of 5A will be lower than the standard of low voltage and high current, and the high current charging line is basically manufactured in accordance with the manufacturer's private agreement.
