Preface
Wireless charging uses the principle of electromagnetic induction to transmit energy to the receiver through the alternating magnetic field generated by the transmitter, so as to realize the charging or power supply of the device. The transmitter generates a magnetic field in the coil through an electric current, and the coil in the receiver senses this magnetic field and converts it into electrical energy.
A typical use case is a wireless charging mouse, where users can simply place the mouse on a mouse pad equipped with a wireless charging transmitter instead of connecting the mouse to the charger through a traditional charging cable. It can be said that wireless charging greatly improves the convenience of users, and at the same time reduces the trouble of users looking for various charging cables.
Mouse with built-in wireless charging receiver chip
For devices such as mice with small battery capacity and low power, there is no need for high-power wireless charging and receiving solutions commonly used in today's mobile phones, but wireless charging and receiving solutions with high integration, small size, high efficiency and low loss. To this end, the charging head network has sorted out the dismantling cases of the mouse with built-in wireless charging receiving chip in the past for the reference of readers and friends.
Some of the parameters of the two chips that appear in the article are shown in the figure, please follow the editor below for details.
Kupo Microelectronics CP2021
COPO CP2021 is a 2.5W highly-integrated SoC wireless charging receiver chip. Compliant with WPC 1.2.3 Qi protocol, WPC BPP certified, output voltage 5V, output current adjustable, up to 600mA, integrated external power input detection function, integrated over-temperature, over-voltage and output over-current protection, integrated temperature monitoring, charging completion and host fault control multi-function NTC control pin.
CP2021 This chip is in QFN-24 4.0mmx4.0mm package, which is suitable for TWS Bluetooth earphone base, mouse, electric toothbrush, face wash, smart wearable devices, various low-power charging equipment, etc.
Application examples
Rapoo dual-mode wireless charging gaming mouse
Rapoo has launched a RAPOO dual-mode wireless charging gaming mouse (VT950Q), which supports Qi wireless charging, and can be recharged at any time with wireless charging mouse pads and other transmitting devices. Wireless wired dual connection mode, symmetrical design for left and right handers, equipped with customized OLED display, equipped with 11 programmable buttons, powerful functions.
Related Reading:
Teardown Report: RAPOO Dual-Mode Wireless Charging Gaming Mouse
雷柏多模式无线充电鼠标M300W
Rapoo M300W wireless Bluetooth mouse supports 2.4G wireless/Bluetooth 3.0, 4.0 multi-mode connection, can connect three devices and quickly switch between devices, the keys are common 6-key settings, which are left button, right button, mouse wheel middle button, DPI switch key, forward key, back key. You can switch between 600/1000/1300/1600 resolutions through the DPI switch key to meet the needs of different users for resolution, and the overall size is small and practical.
Related Reading:
Teardown report: Rapoo Multi-Mode Wireless Charging Mouse M300W
Rapoo Multi-Mode Wireless Charging Mouse MT750W
Rapoo Multi-Mode Wireless Charging Mouse MT750W supports driver customization, plus has 8 customizable buttons, users will be very convenient to use. The mouse body adopts an ergonomic large side design, so you will not get tired when you use your hands for a long time. The DPI has four gears of 600/1200/1600/3200 to meet the needs of different users. The mouse supports Bluetooth 3.0, 4.0 and wireless 2.4G three intelligent connection modes, stable and reliable transmission, and a wide range of adaptation devices.
Related Reading:
Teardown Report: Rapoo Multi-Mode Wireless Charging Mouse MT750W
Maxic MT5705
Maxic MT5705 is a magnetic induction-based wireless charging receiver SoC (System on Chip) with embedded ARM Cortex M0 processor, 2KB SRAM, 8KB OTP, fully compliant with BPP's latest WPC Qi specification (version 1.2.4).
The MT5705 can provide stable 5W output power, support 5V output voltage, output current up to 1A, AC to DC conversion efficiency up to 95%, it has perfect over-voltage, over-current, over-temperature protection mechanism, independent I2C communication interface and rich GPIO. The package is 4*4mm QFN-32 package, which is especially suitable for various low-power smart devices such as TWS earphone charging case, mouse, etc.
Application examples
Rapoo Dual-mode Wireless Charging Gaming Mouse V20W
Rapoo V20W wireless mouse adds wireless charging function on the basis of traditional wireless mouse, so that the mouse can completely get rid of the shackles of cables, and save the trouble of finding cables when occasionally need to be charged. The mouse has a built-in Nordic wireless transmission chip and a pix-to-side sensor, with Omron micro motion, and a high-end configuration. It also has a three-zone RGB backlight and supports switching between normal mode and game mode.
Related Reading:
Teardown report: Rapoo Dual-mode Wireless Charging Gaming Mouse V20W
Summary of the charging head network
The charging head network learned that the two chips mentioned in the article, Kupo Microelectronics CP2021 and Maxic MT5705, both support the Qi wireless charging protocol, integrate a number of functions and built-in rich peripherals, and the peripherals are very streamlined, although the receiving power of the two chips is not high, but their high integration and low loss characteristics are more suitable for small electronic devices such as mice and electric toothbrushes. The built-in wireless charging function can improve the integration of the product and enhance the waterproof performance of the device, which can be described as killing two birds with one stone.
In addition to small consumer electronics such as mobile phones, watches, headphones, and wireless mice, wireless charging technology can also be widely used in medical equipment, industrial robots, smart homes and other fields, providing more convenient and efficient charging solutions for various devices. Thus eliminating the shackles of the power supply line. In addition, wireless charging is also expected to enter the field of new energy vehicles, charging electric vehicles through the power supply rail buried under the ground, even if it is driving on the road, you can charge the vehicle, so that there is no need to plug in the charging cable, and there is no longer anxiety about battery life.