Recently, the standard 88W charger in the box of the Huawei P60 Pro phone caused controversy on the Internet. use.
In this regard, Huawei Terminal BG CTO Bruce Lee responded. He said that he was the “initiator” of this design scheme. In order to prevent the user from plugging in the line but no output voltage, resulting in no charging or mistakenly thinking that the charger is faulty, physical interference was adopted. The method allows users to only plug in one charging cable at a time, and this design also reduces the user’s learning costs.
Bruce Lee also said that some users asked why it cannot be designed to output two channels at the same time. If it is designed to output two channels at the same time, a power conversion circuit needs to be added, which takes up a lot of space. The size of the charger must be increased, and the compact design The original intention was violated. It is designed to choose one of the two, only need to increase the protocol control and on-off control circuit, and the increased size can be ignored.
The full text of Bruce Lee’s response:
Recently, the standard 88W charger (middle of the picture below) in the box of the Huawei mobile phone P60 Pro uses a USB-A / USB-C two-choice connector, which has caused some controversy. I am the instigator of this design scheme. Let me tell you why it is designed in this way.
The earliest we adopted this design was a 66W multi-port charger (upper left in the figure below). The initial design specification was a total power of 66W with dual-port flexible distribution, but disputes arose over the choice of A+C or C+C or A+A . Because no matter which option you choose, some users will not be able to use it. Laptops must use the C port, because only the C port can support the common PD charging protocol on PCs. Although some small home appliances support Type-C input, they must use the A to C line for power supply due to design defects. Some watches The charging cable must use the A port. In the end, I adopted the option of choosing one of A and C plus A port that I proposed. Choose one of A and C and only one port can output voltage at the same time. In order to prevent the user from plugging in the cable but no output voltage, resulting in no charging or mistakenly thinking that the charger is faulty, a physical interference method is adopted so that the user can only plug in one port at the same time. This design also reduces the user's learning cost. Someone also proposed to use the slider baffle to choose one of the two, but I rejected it, because the sliding baffle requires the user to add an action out of thin air, which increases the inconvenience of use.
The current alternative is the most user-friendly design. Now we have more chargers with this design, such as the just-released 88W multi-port car charger (bottom right in the picture below), users can use this car charger to power computers and driving recorders at the same time, or mobile phones and driving A recorder, or a computer and a mobile phone, or two mobile phones. Maximum flexibility in minimum size.
The following is the anti-bar link:
Some users also asked why it cannot be designed to output two channels at the same time. If it is designed to output two channels at the same time, a power conversion circuit needs to be added, which takes up a lot of space, and the size of the charger must be increased, which is contrary to our original intention of compact design. It is designed to choose one of the two, only need to increase the protocol control and on-off control circuit, and the increased size can be ignored.
Our 66W multi-port charger has been on the market for two years, and there is no dual-port charger with the same power level that is smaller than this one on the market, right?
