Abstract: February 9 news, recently, some Weibo users released a message that Xiaomi released in December last year to support a single battery cell 120W fast charging "self-developed charging chip" surging P1 is not Xiaomi's self-developed, in fact, it was purchased from the outside. In this regard, the foundry of xiaomi surging P1 chip, Nanxin Semiconductor, issued a statement on February 9 in response, saying that the rumor was a "false rumor".
February 9 news, recently, a Weibo user released a message that Xiaomi released in December last year to support a single battery cell 120W fast charging "self-developed charging chip" surging P1 is not Xiaomi's self-research, in fact, it was purchased from the outside. In this regard, the foundry of xiaomi surging P1 chip, Nanxin Semiconductor, issued a statement on February 9 in response, saying that the rumor was a "false rumor".
On December 24, Xiaomi officially announced the third self-developed chip - surging P1 at the "Inaugural Meeting of Guangdong Terminal Fast Charging Industry Association", which is also Xiaomi's first self-developed charging chip, which supports single-cell 120W fast charging, and then this chip is first installed by Xiaomi 12 Pro.
According to reports, as the industry's first resonant charging chip, the surging P1 has a 4:1 ultra-high efficiency architecture with adaptive switching frequency, the resonant topology efficiency is as high as 97.5%, the non-resonant topology efficiency is 96.8%, and the heat loss plummets by 30%. The surging P1 is also the 4:1 charging chip with the highest charging efficiency of Xiaomi, which can achieve ultra-high power density of 0.83W/mm, and LDMOS has also reached the industry-leading ultra-low 1.18mΩmm RSP. With the efficient ultra-high voltage 4:1 charging architecture, the surging P1 realizes 120W single-cell charging, and supports 1:1, 2:1 and 4:1 conversion modes, all modes can be dual-guided, which can realize wired 120W, wireless 50W, wireless reverse charging and other charging functions.
Xiaomi said that in the past single-cell fast charging system, to convert the 20V voltage input to the mobile phone into a 5V voltage that can be charged into the battery, it requires 5 different kinds of charge pump series parallel circuits. A large number of charge pumps and the overall series of architecture will bring a lot of heat, in actual use can not achieve a long time full power operation, it is more difficult to achieve 120W high power fast charging. The core of driving Xiaomi 120W surging second charge is two Xiaomi self-developed smart charging chips: surging P1. They take over the traditional 5-charge pump complex structure, converting the high-voltage power input into the phone's high-voltage power more efficiently into a large current that can be directly charged to the battery.
However, recently Weibo user @ Meng DadFeng released a set of Xiaomi surging P1 chip and another chip that has been hidden from the name of the wafer silk screen comparison chart, from the picture, the two chips of the wafer screen comparison chart is very similar. The microblog received a lot of forwarded comments from netizens, and some netizens commented below, "The surging P1 is bought."
For the relevant rumors on the Internet, Shanghai Nanxin Semiconductor Technology Co., Ltd. issued the "Explanation on False Rumors of Xiaomi Surging P1" on February 8, saying that the Xiaomi Surging P1 chip was designed by Xiaomi itself and OEM of Nanxin Semiconductor (internal code NAME SC8561). Although Nanxin Semiconductor released a fast-charging chip in September 2021 - Nanxin SC8571, this chip is still quite different from the Xiaomi Surging P1. Nanxin SC8571 is an ultra-high voltage 4:2 charging architecture, which can realize 120W dual-cell charging, which supports 4:2 and 2:2 modes for ultra-high power charging needs. The surging P1 is an ultra-high voltage 4:1 charging architecture, which realizes 120W single-cell charging and supports 1:1, 2:1 and 4:1 conversion modes.
Nanxin Semiconductor said, "Xiaomi's self-developed surging P1 charging chip and Nanxin SC8571 topology are completely different, which are two charging chips with different designs, different functions and different positioning. ”
Editor: Xin ZhiXun - Lin Zi