Method and device for realizing fixed-frequency voltage-regulating wireless charging through QC and PD protocols

Abstract

The invention discloses a method and device for realizing fixed-frequency voltage-regulating wireless charging through QC and PD protocols. The method is based on a main control chip, a transmitting coil, an MOS transistor switching circuit, and a charger, and comprises the following steps that: the charger supplies a working power supply to the transmitting coil; the main control chip controls the MOS transistor switching circuit to be alternately switched on and off; the transmitting coil forms a conduction full-bridge rectification circuit, and transmits magnetic energy to a mobile phone soas to charge the mobile phone; the transmitting coil receives feedback signals from the mobile phone, and the main control chip demodulates the feedback signals and calculates power and voltage required by the mobile phone; the main control chip sends the QC protocol or PD protocol to the charger at the front end through a USB data line; and the charger adjusts voltage to voltage required by thetransmitting coil order by order with 0.2 V taken as an adjusting order, so that the mobile phone obtains the required charging power. The a method and device have the advantages of low cost, simple control circuit, smaller heat emission quantity of the wireless charger, and the like.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a method and device for realizing fixed-frequency and voltage-regulated wireless charging through QC and PD protocols. Background technique [0002] With the progress of society and the development of science and technology, traditional charging methods can no longer meet the needs of people's life and production, so wireless charging technology has also attracted the attention of all aspects of society. Wireless charging is to transmit power and energy wirelessly without a physical connection, and can realize wireless charging for mobile phones, electric toothbrushes, TWS earphones, charging treasures and other electronic products. [0003] In recent years, more and more mobile phones are using wireless charging, and the requirements for wireless chargers are also getting higher and higher. There are several control methods for the transmitter of the current wireless ...

AI Technical Summary

Problems solved by technology

However, adding a buck or boost circuit will increase the complexity and cost of circuit control, and the power consumption of wireless charging itself will increase; the method of adjusting voltage by adding a buck and boost circuit is costly, the control circuit is complicated, and the heat generated High impact on the promotion and use of this program

[0007] There are more or less problems in the above control methods, and it will still cause inconvenience in the actual application of wireless charging

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