Today Xiaomi introduced new breakthroughs in the wireless charging industry, including the first 30W fast wireless charging device with high power reverse-charging capabilities.
The Mi 9 Pro 5G smartphone will sport this technology soon, along with two brand new wireless charging accessories. Xiaomi also announced it will be forming a wireless charging alliance with cross-industrial companies to further promote wireless charging in everyday life settings. In addition, the Chinese company showcased its 40W wireless charging technology, which is already in-test.
Xiaomi talked about "an efficient 4:1 direct-charge architecture, high power wireless reverse-charging technology, a more secure and stable dual band transmission technology and a universal combination of wired OTG reverse-charging and high-power wireless reverse-charging" as part of the presentation of its wireless charging approach for mobile devices.
Compared to the company's previous 20W wireless charging 2:1 direct-charge architecture, the new 4:1 direct-charge architecture utilizes two levels of charge pump voltage reduction. Xiaomi says that the new architecture further improves efficiency while reducing the heat produced during charging. You can expect the 30W Fan-cooled Wireless Charging Stand to charge your 4000mAh battery from zero to 50% in about 25 minutes, and 100% in 69 minutes.
High-power wireless reverse charging utilizes BOOST combined with a 1:2 reverse charge pump. Voltage doubles to achieve a maximum power of 10W, which is twice that of the 5W reverse charging power solution offered in the current market. At the same time, this technology also includes seven protection measurements, such as over-current and over-voltage protection, to ensure the wireless reverse charge is safe.
Xiaomi's new dual band transmission technology also utilizes Bluetooth. Compared to the communication protocol of the original Qi standard, which combines data and power transmission, dual band transmission technology separates the power transmission from the data communication. It also uses the mobile device’s Bluetooth function to transmit data, which reduces the chance of disconnecting while in wireless charging mode and improves stability, with some additional benefits like transmitting time and battery percentage information between devices.
The Mi 9 Pro 5G supports four types of charging: wired fast charging, wireless flash charging, wired OTG reverse charging and wireless reverse charging. This combination lets you charge your devices whenever, and wherever. For example, when your phone is using wired fast charging, you can also use its wireless reverse charging functionality to charge other phones or earphones that support wireless charging; or supply power to other devices through wired OTG while it is using wireless flash charging.
Xiaomi introduced two brand new wireless charging accessories – 30W Fan-cooled Wireless Charging Stand and 20W Smart Tracking Wireless Charging Pad. 30W Fan-cooled Wireless Charging Stand sports an ergonomic design. This product also features a vertical air duct design that allows the air outlet to blow directly to the phone to reduce obstructions, improve heat dissipation and reduce the dust trapped in the air duct.
The 20W Smart Tracking Wireless Charging Pad automatically tracks and aligns its charging coils to a user’s smartphone. Its new dual band transmission technology displays the receiving smartphone’s charging status and time while charging wirelessly.
Xiaomi has also demonstrated the 100W super fast charge technology with full charge of 4000mAh battery under 17 minutes.