Preface
Nowadays, smart wearable devices are becoming more and more common, and smart watches are one of them, which has changed the traditional way we check the time, and through the interconnection with smartphones and other devices, it provides health monitoring, sports tracking, notification management, music control, mobile payment, voice assistant and other services, greatly improving our quality of life and efficiency. These smartwatches are replacing traditional watches and are becoming more and more popular among young people, reshaping the way we interact with the digital world.
Jinxian has launched three watch charging solutions for the charging needs of smart watches, including dual-protocol wireless charging solutions, which are compatible with Apple and Samsung watches, please see below for details.
Watch dual-protocol chip scheme
Jinxian Technology has recently launched a dual-protocol chip compatible with Apple and Samsung Watches, which is currently the first in the industry to be suitable for both Apple Watch dynamic decoding and Samsung Watch dual-protocol charging, which can provide 2.5W wireless charging for Apple Watch series watches and about 1.5W wireless charging for Samsung watches.
As shown in the figure above, the dual-protocol chip scheme of Jinxian Apple and Samsung Watch is composed of a PCB small board and a wireless charging coil module, which is connected by wires in the middle. The PCB board is soldered with components such as MCU, MOS tube driver, filter capacitor, and inductor.
The wireless charging coil module is mainly wound by litz wire, and a magnet is provided in the middle to adsorb the watch; Since the wireless area magnetism of the Apple Watch and Samsung Watch is just the opposite, adjusting the direction of the magnet in the middle of the charging coil can be adapted to the two brands of watches.
For a more detailed charging test, please click below.
Jinxian wireless charging main control chip 9913
Jinxian Technology has launched a dedicated Apple wireless charging main control chip, which integrates the ARM Cortex-M0+ core and authentication module, with built-in 32KB FLASH and 4KB SRAM, which can realize 2.5W wireless charging for the Apple Watch.
The 9913 main control chip is responsible for the wireless charging function of the watch, and is packaged in an TSSOP20 package, with an LM324 op amp and a MOS tube. The wireless charging solution uses 5V power supply, and the overall volume is the same as that of the watch's wireless charging coil.
The Apple Watch wireless charging solution equipped with the Jinxian 9913 main control chip is composed of two parts: a circular PCB board and a wireless charging coil.
The devices on the PCB are single-sided and have test points.
The wireless charging master control chip, the op amp chip and a dual MOS tube are soldered on the round PCBA module.
The main control chip of the wireless charging solution comes from Jinxian Technology, model 9913, the chip has a built-in 32-bit ARM Cortex-M0+ core, the maximum working frequency is 48MHz, built-in 32KB FLASH and 4KB SRAM, the chip supports low-power mode, and the chip has PWM drive signal output for driving the wireless charging power tube.
The 9913 also integrates three USART interfaces, an I2C interface and an SPI interface, a serial debug interface, and a buzzer drive output. Each chip has a 96-bit unique ID and is available in a TSSOP package. In addition, the 9913 also integrates an authentication module to communicate through the I2C interface to realize the 2.5W application of the Apple Watch.
锦弦Apple Watch 5W快充芯片方案
As shown in the figure above, the Apple Watch fast charging chip solution is composed of a PCB board and a wireless charging coil module, which are connected by wires in the middle.
The PCB board is soldered with components such as MCU, MOS tube driver, filter capacitor, and inductor, and a USB-A port is connected to the left side.
The internal rubber core of the USB-A port is black.
The wireless charging coil module is mainly wound with litz wire, and a magnet is installed in the middle to adsorb the watch.
The back of the wireless charging coil module is glued with double-sided tape.
锦弦Apple Watch 5W快充芯片方案PCB小板宽度约为17.46mm。
The length of the PCB board and the length of the USB-A port are about 37.86mm.
The diameter of the wireless charging coil module is approximately 24.17mm.
The thickness of the wireless charging coil module is about 3.07mm.
锦弦Apple Watch 5W快充芯片方案整体重量约为8g。
Placed in the palm of an adult male's hand, it can be very small overall and has excellent volume control.
Summary of the charging head network
The development of smartwatches is not only showing the advancement of technology, but also reshaping the way we live our daily lives. Jinxian Technology has launched a variety of charging solutions for smart watches, including a dual-protocol chip solution compatible with Apple and Samsung, a 9913 main control chip solution dedicated to Apple's wireless charging, and an Apple Watch 5W fast charging chip solution. These solutions can effectively improve the charging efficiency and compatibility of watches, and also provide consumers with more convenience and choice.
With the continuous advancement of technology, we can foresee that smart watches and their supporting products will become more intelligent and humane, and continue to lead the future trend of life.