Reverse wireless charging circuit design based on Ti TPS61372 or TPS61089 boost converter

In recent years, the reverse wireless charging function has also become one of the trends of high-end smartphones. Smartphones are not only a communication tool, but also become a smart electronic device that combines multi-function, wireless charging for TWS wireless headphones, smart watches or other phones, as shown below. The circuit diagram of the reverse wireless charging mobile phone is shown below, in which the boost varifier can select the TPS61372 or TPS61089 of Texas Instruments. The boost scheme is supported in the reverse wireless charging TPS61372 has the following significant advantages in reverse wireless charging applications: · Wide range voltage output up to 16V, reduce coil current, reduce coil loss; · The overall size is small, simple design, low BOM cost · The chip uses a small size WCSP package, only 1.57mm × 1.52mm × 0.5mm, especially suitable for mobile applications; · Support 1.5MHz high switching frequency, can effectively reduce the size of external inductance capacitance, reduce costs; · There is less external components and simple design; • PFM mode or PWM mode can be selected under light load, flexible to meet the customer's light load efficiency or EMI design requirements. · It has a true shutter function, when the chip is in a non-operating state, the input and output terminals are really off, and the standby power consumption is reduced. In addition, the boost converter can also be applied in the wireless charging mobile power supply, and the mobile power support for wireless charging is also incurred, and its wireless charging circuit structure is similar to the phone. At present, the wireless charging power of the mobile power is 5W ~ 20W, the Texas Instrument Power Converter TPS61089, TPS61088, TPS61178 can be used for this application. The maximum output voltage of TPS61089, TPS61088 is 12.6V, and both supports maximum switching current of 7A and 10A; the maximum output voltage of TPS61178 is 20V, which provides a switch current of up to 10A. The three chips of Texas Instruments are synchronous boost converters integrated up and tubes, which can meet the design needs of 5W ~ 20W wireless charging power supply. Be Article source network

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