Multifunctional mobile phone power supply switching circuit

Abstract

The invention discloses a multifunctional mobile phone power supply switching circuit which comprises a charging port and a battery, wherein the charging port comprises a USB interface, an OTG interface and a wireless charging interface, wherein the power supply switching circuit is arranged between the charging port and the battery; and the power supply switching circuit comprises a wired charging circuit, a wireless charging circuit and a charging chip, the charging chip is respectively connected with the wired charging circuit and the wireless charging circuit, the charging chip is connected with the battery, the wired charging circuit is respectively connected with the OTG interface and the USB interface, and the wireless charging circuit is connected with the wireless charging interface. According to the multifunctional mobile phone power supply switching circuit, the feature that the conduction voltage drop of the MOS tube is very small is utilized, the voltage loss of each charging path after conduction is very small, the use efficiency of the power supply is improved, pure hardware switching is realized, the switching speed of the charging paths is favorably improved, the safety is improved, a special multi-power supply management chip is not needed, the cost is low, and the multifunctional mobile phone power supply switching circuit is not only suitable for mobile phone products, but also suitable for other electronic products.

Description

technical field [0001] The invention relates to the field of charging, in particular to a multifunctional mobile phone power switching circuit. Background technique [0002] Mobile phones consume more and more energy, and charging is becoming more and more important and diverse. Many mobile phones have wireless charging function and conventional usb charging. In addition, mobile phones also have OTG function. OTG function includes identifying peripherals, such as U disk, and can also charge other mobile phones to realize mutual charging between mobile phones. [0003] For some mobile phones with multiple charging methods on the market, some power management chips are also multi-power management chips, but the cost of power management becomes higher; some power management relies on software control, which makes power management easy to modify and less secure. Poor, and there will be a delay when switching the charging mode; and when some power management is carried out at th...

AI Technical Summary

Problems solved by technology

[0003] For some mobile phones with multiple charging methods on the market, some power management chips are also multi-power management chips, but the cost of power management becomes higher; some power management relies on software control, which makes power management easy to modify and less secure. Poor, and there will be a delay when switching the charging mode; and when some power management is carried out at the same time in multiple charging modes, the coordination and management are chaotic, which is likely to cause circulation between different power sources, reverse flow, and lightly affect the life of the power supply, or heat and other problems ; Severe cases can cause cell phone burning, fire, etc.; and some power management designs are very complicated, resulting in a large loss in power management when charging the battery

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