Buck-boost-integrated wide-range-output automatic-load-detection mobile power circuit

Abstract

The invention relates to a buck-boost-integrated wide-range-output automatic-load-detection mobile power circuit. The buck-boost-integrated wide-range-output automatic-load-detection mobile power circuit comprises a chargeable battery, a charging and protecting circuit, a buck-boost-integrated circuit, an automatic load detection circuit, a controller, a reference voltage circuit and a pulse modulation circuit, wherein the charging and protecting circuit is used for charging the chargeable battery, the buck-boost-integrated circuit is used for the wide-range output of the chargeable battery, and the pulse modulation circuit is used for modulating the pulse widths of a first electronic switch and a second electronic switch. According to the buck-boost-integrated wide-range-output automatic-load-detection mobile power circuit, the overvoltage, overcurrent and overtemperature protection of a mobile power charging circuit and the buck-boost-integrated wide-range voltage output of a mobile power discharging circuit can be simultaneously realized, and the function that whether a load is accessed or not can be automatically detected can be realized, so that the buck-boost-integrated wide-range-output automatic-load-detection mobile power circuit has the advantages of powerful function, simple circuit, low cost and convenience in production.

Description

technical field [0001] The invention relates to a charge-discharge circuit of a mobile power supply, in particular to a mobile power supply circuit with integrated step-down and step-down wide-range output and automatic load detection. Background technique [0002] With the continuous development of science and technology, the application of mobile electronic devices such as notebooks, MP3, digital cameras, and mobile phones has become an important link in people's lives and work. However, the existing mobile devices are all built-in batteries, and their battery capacity is limited. , especially for mobile phones, in the case of being unable to charge during business trips or trips, it will bring a lot of inconvenience to people's work and life. As a portable charger integrating power supply and charging functions, mobile power can solve the above problems. [0003] The existing mobile power supply includes a charging circuit and a discharging circuit. Generally, some prote...

AI Technical Summary

Problems solved by technology

[0003] The existing mobile power supply includes a charging circuit and a discharging circuit. Generally, some protection circuits are independently set in the charging circuit, such as an over-current protection circuit, an over-voltage protection circuit, and an over-temperature protection circuit. The rechargeable battery in the power supply is damaged during the charging process, but because these protection circuits are independently set, the circuit is complicated, the integration is high, and the cost is high; the discharge circuit is generally aimed at a certain type of mobile electronic device or a mobile device with the same input voltage Therefore, the power supply for mobile electronic devices requires a special supporting mobile power supply, which wastes resources, and when carrying a variety of mobile electronic devices, it is necessary to carry a variety of mobile power supplies, which is not easy to carry. Convenient; the existing mobile power supply does not have a load (referring to mobile electronic devices powered by mobile power supply) automatic detection function, that is, whether there is a load connected, the mobile power supply will be lost, wasting energy

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