Charging circuit and charging method
A charging circuit and charging current technology, applied in battery circuit devices, circuit devices, safety/protection circuits, etc., can solve the problems of large size and occupied space of the charging chip, and reduce the occupied space and volume. Effect
Pending Publication Date: 2021-12-21
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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- Abstract
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Problems solved by technology
[0005] The invention provides a charging circuit and a charging method, which are used to solve the problems in the prior art that the charging chip has a large volume and takes up a large space on the PCB board
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[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the charging circuit and the charging method based on the charging circuit provided by the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. It should be noted that the shape of each figure in the drawings does not reflect the actual scale, and the purpose is only to illustrate the content of the present invention. And the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout.
[0046] The implementation of the present i...
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The invention discloses a charging circuit and a charging method. The charging circuit comprises a reverse cut-off unit and a charging chip corresponding to the reverse cut-off unit, wherein the input end of the reverse cut-off unit is connected with a power supply, and the output end of the reverse cut-off unit is connected with the voltage input end of the charging chip. When the voltage value of the input end of the reverse cut-off unit is smaller than the voltage value of the output end of the reverse cut-off unit, the connection between the input end of the reverse cut-off unit and the output end of the reverse cut-off unit is cut off; and the charging chip corresponding to the reverse cut-off unit is used for acquiring a voltage value output by the reverse cut-off unit in real time, comparing the acquired voltage value of the output end of the reverse cut-off unit with a current threshold voltage value, determining a current value according to a comparison result, and charging by using the current value. The reverse cut-off unit in the charging circuit can replace a component with a reverse cut-off function in the charging chip, so that the size of the chip can be reduced, and the space occupied by the charging chip on a PCB (Printed Circuit Board) is reduced.
Description
technical field [0001] The invention relates to the technical field of charging, in particular to a charging circuit and a charging method. Background technique [0002] With the rapid development of smart phones, the charging speed and temperature rise experience have attracted the attention of users. The traditional single charging solution can no longer meet the higher charging needs of users, and the emerging low-voltage direct charging or flash charging solution will increase the design cost, while the parallel charging solution takes into account the design cost and charging speed, and has become the best cost-effective charging solution. [0003] The design of parallel charging includes the main charging chip and the auxiliary charging chip. When using the parallel charging method for charging, the entire charging path is uniformly controlled by the main charging chip, part of the current flows from the main charging chip to the battery, and the other part of the curr...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/007182H02J7/0034Y02E60/10
Inventor 洪超聂圣童赵辉
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD