Current Expansion Fast Charging Circuit for Handheld Electronic Devices

An electronic device and fast charging technology, applied in the direction of circuit devices, battery circuit devices, current collectors, etc., can solve the problems of increased space occupied by printed circuit boards, waste of resources, manual debugging, etc., to meet charging requirements and increase charging speed , The effect of preventing mischarging
CN101662162BActive Publication Date: 2012-02-15SUNWODA ELECTRONICS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SUNWODA ELECTRONICS
Publication Date
2012-02-15

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Abstract

A current expansion fast charging circuit for a handheld electronic device, including a charging management module integrated in the main chip of the handheld electronic device or built separately, and a rechargeable battery, especially, it also includes a basic charging current sampling resistor, an expansion The current charging current sampling resistor and the comparison expansion module; when the charging management module charges the rechargeable battery, the comparison expansion module outputs the expanded current from the expansion output port according to the voltage difference between the two comparison input ports. The current expansion fast charging circuit of the present invention has a simple structure and occupies less space on the printed circuit board. The actual charging current of the rechargeable battery is greatly increased in proportion by two sampling resistors and the comparison current expansion module, which improves the charging speed and meets the requirements for large capacity. The charging requirements of the rechargeable battery; at the same time, the charging management module can maintain the three-stage charging of the small current pre-charging stage, the constant current charging stage, and the constant voltage charging stage for the rechargeable battery, which is conducive to maintaining the life of the rechargeable battery.
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Description

technical field

[0001] The invention relates to a charging device for a rechargeable battery, in particular to a current expansion charging circuit suitable for a charging management module of a handheld electronic device. Background technique

[0002] With the rapid development of multimedia technology, Bluetooth technology, wireless network technology, etc., a variety of handheld electronic devices have appeared on the market, including Internet radio, Bluetooth hands-free devices, portable media players, mobile communication terminals, global positioning system GPS, handheld Instruments and PDAs. Generally, the handheld electronic devices have a built-in rechargeable battery as a power source; in order to cooperate with the reasonable charging of the battery, the handheld electronic device is also equipped with a charging management module separately or integrated in the main chip. In order to meet the requirements of miniaturization and portability, the space provided b...

Claims

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