Ding Xiaoxu ete:Microcontroller-based mobile wireless charger design AD73311 universal analog front-end principle and Pus=3.7×2×0.4=3.0m its application in speech processing Electronic technology,1999(8):53-55 PLmch =12x1=12w 7=n=30×100%=25% Form I The actual charge Phone Charge into the Time(min) Distance electricity (cm) Small 30% 30 6 wasp Small 40% 30 HTONEX 40% 60 5 HTONEX 10% 30 8 3CONCLUSIONS This design enables the transmission distance of 5-10cm,it is suitable for most mobile phones interface, a wireless charging.and it solves the issue that wired design,so easy to debug and troubleshooting But charging a bit low,the transmission distance is shorter. if in-depth study,by increasing the supply voltage to 24V or increasing radius of the coil.If PWM can be produced chips.whichcan reduce the burden on the microcontroller,and can improve the circuit output accuracy. References [1]Xiao Zhijian,Han Zhenyu,Li Shaozhuo about the new wireless charging portable electronic device system research []Automation and Applications 2007,12:114-116. [2]Digital Voice Systems.Inc.AMBE1000 Vocoder ChipUsers Manual Version 4.1 [M]2004-04. [3]Zhou Ligong.Zhang.Easy ARM7 [M].Beijing Aerospace University Press,2005:52-53.70-90. [4]Zhang Xin Yi,Luton Lu,Zhang YouweiDing Xiaoxu etc.: Microcontroller-based mobile wireless charger design 5 1A. PRMS = 3.7 × 2× 0.4 = 3.0w PLaunch =12×1 =12w 100% 25% 12 3.0 = = × = Launh RMS P P η Form.1 The actual charge Phone Charge into the electricity Time（min） Distance （cm） Small wasp 30% 30 6 Small wasp 40% 30 5 HTONEX 40% 60 5 HTONEX 10% 30 8 3 CONCLUSIONS This design enables the transmission distance of 5-10cm, it is suitable for most mobile phones interface, a wireless charging, and it solves the issue that wired charging port is not compatible inconvenient to carry .System hardware and software are modular in design, so easy to debug and troubleshooting.But charging a bit low, the transmission distance is shorter, if in-depth study, by increasing the supply voltage to 24V or increasing radius of the coil. If PWM can be produced by separate chips, which can reduce the burden on the microcontroller, and can improve the circuit output accuracy. References [1] Xiao Zhijian, Han Zhenyu, Li Shaozhuo about the new wireless charging portable electronic device system research [J]. Automation and Applications 2007,12:114-116. [2] Digital Voice Systems. Inc. AMBE1000 Vocoder ChipUsers Manual Version 4.1 [M] .2004-04. [3] Zhou Ligong, Zhang. Easy ARM7 [M]. Beijing: Aerospace University Press,2005:52-53,70-90. [4] Zhang Xin Yi, Luton Lu, Zhang Youwei. AD73311 universal analog front-end principle and its application in speech processing [J]. Electronic technology, 1999 (8) :53-55