Multifunctional charger

Abstract

The invention discloses a multifunctional charger. The multifunctional charger comprises a single-chip microcomputer, an AC / DC switching circuit, a voltage adjusting and current adjusting module, a current detection circuit, a USB output interface I, an externally-connected charging module and a switching circuit, wherein the AC / DC switching circuit is used for switching input commercial power into the direct current; the voltage adjusting and current adjusting module is used for receiving a command of the single-chip microcomputer to carry out voltage adjusting and current adjusting on the direct current output by the AC / DC switching circuit; the current detection circuit is used for dynamically detecting the voltage and current parameters of the direct current output by the voltage adjusting and current adjusting module in real time and providing the voltage and current parameters to the single-chip microcomputer; the USB output interface I is connected to electric equipment; the externally-connected charging module is connected to the electric equipment; and the switching circuit is used for outputting a working power supply output by the current detection circuit to the electric equipment through the USB output interface I or the externally-connected charging module. According to the multifunctional charger, voltages and currents optimally matched with different electric equipment can be output, and the multifunctional charger is also suitable for batteries with different interfaces and types.

Description

technical field [0001] The invention relates to a multifunctional charger. Background technique [0002] With the rapid development of information technology, the performance of various electrical equipment and various mobile phones is also getting higher and higher, and the requirements for batteries that provide power are also getting higher and higher. The output voltage and current of the USB (Universal Serial Bus) charger equipped by the original factory of traditional electrical equipment are fixed, and different electrical equipment should be equipped with different chargers, resulting in waste of resources; the unified standard USB socket and computer The output voltage and current of the USB interface on the host are also impossible to apply to all electrical equipment, or the charging voltage and current are too large or the charging voltage and current are too small. [0003] These traditional USB charging devices have the following defects in use: [0004] 1. T...

AI Technical Summary

Problems solved by technology

[0004] 1. The USB interface on the host computer has an output voltage of 5V and a current of 500mA. Charging an electrical device that requires an input current greater than 500mA will prolong the charging time, but it is impossible to charge without turning off the computer. If the battery is not fully charged The power is cut off, which affects the service life of the battery

[0005] 2. The output voltage and current of traditional USB charging adapters are generally 5V and 1000mA, which are within the national standard range, but they can only be optimally used for electrical equipment that requires an input current of 1000mA. For electrical equipment that requires an input current of less than 1000mA, it will Cause battery overcharge, heat generation and shorten battery life and other accidents

[0006] 3. For the currently widely used tablet computers, the input voltage is generally 5V to 12V, and the input current is generally 1A-2.5A, which makes the traditional output 5V-1A / 2A USB charging adapter unusable, and can only be purchased additionally. charging adapter

[0007] 4. For portable devices such as ordinary rechargeable batteries and cameras, the charging voltage ranges from 1.25V to higher voltages, and the charging interface is different. Traditional USB charging devices cannot be charged, and must be equipped with special chargers, resulting in charging problems. Repeated purchase of equipment creates waste

[0008] 5. Nowadays, there are more and more portable electrical devices in the family, and the one-to-one charging mode has caused a lot of waste of resources and inconvenient storage, especially when traveling or traveling, this phenomenon is more serious

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