Mobile phone case for mobile phone wireless charging
A technology for wireless charging of mobile phones and mobile phone casings, which can be used in current collectors, electric vehicles, electrical components, etc., and can solve problems such as inability to wirelessly charge mobile phones.
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[0019] Such as figure 1 As shown, the mobile phone wireless charging device is powered by the power supply 1, and the power management circuit 2 is a Boost-Buck circuit, which converts the power supply into 5V-20V direct current. This voltage can be adjusted by the communication and control circuit 3 according to the signals fed back from the wireless receiving circuit 6 and the coil sampling circuit 5; the DC power source converted by the power management circuit 2 supplies power to the high frequency oscillation and power amplifier circuit 4; The management circuit 2 can adjust the voltage, so the output power of the wireless transmitting coil 8 can be controlled by adjusting the output voltage of the power management circuit 2. The tuning capacitor 7 is used for frequency matching of the oscillation circuit.
[0020] The communication and control circuit 3 can generate a high-frequency square wave signal with a frequency range of 100KHz to 250KHz, and the signal is amplified b...
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