A half-voltage circuit protection method and mobile terminal
A mobile terminal and circuit protection technology, applied in the field of communication, can solve the problems of inability to effectively detect the half-voltage circuit and ensure the charging effect of the mobile terminal, and achieve the effect of ensuring the charging effect and the state is safe and controllable
Active Publication Date: 2018-09-04
VIVO MOBILE COMM CO LTD
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Problems solved by technology
[0010] The invention provides a half-voltage circuit protection method and a mobile terminal to solve the problem that the prior art cannot effectively detect the open-circuit failure state of the charging capacitor in the half-voltage circuit, resulting in the inability to ensure the charging effect of the mobile terminal
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[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.
[0038] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, words like "a" or "one" do not denote a limitation in quan...
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The invention provides a half-voltage circuit protection method and a mobile terminal. The method comprising: charging a charging capacitor by a first current, the current value of the first current being less than the rated operational current of a half-voltage circuit; acquiring the temperature value of the charging capacitor in the working state; determining the difference between the temperature value of the charging capacitor in the working state and the temperature value of the charging capacitor in the non-working state as the temperature rise value of the charging capacitor; determining a current value corresponding to the temperature rise value; when the current value corresponding to the temperature rise value is less than or equal to the rated operational current of the half-voltage circuit, adjusting the first current to the rated operational current; and when the current value corresponding to the temperature rise value is greater than the rated operational current of the half-voltage circuit, reducing the current value of the first current. The temperature rise value of the charging capacitor in the half-voltage circuit is used as the detection basis for judging whether the charging capacitor is in the open circuit failure, the open circuit state of the charging capacitor can be detected in real time, the state of the half-voltage circuit is enabled to be safe and controllable, and the charging effect of the mobile terminal is ensured.
Description
technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a half-voltage circuit protection method and a mobile terminal. Background technique [0002] At present, there is a new circuit architecture in the high-voltage fast charging solution for mobile terminals, namely the half-voltage circuit structure. This half-voltage circuit structure combines the advantages of increasing the charging path voltage and reducing the current and power loss on the line in the traditional high-voltage charging solution, and In the low-voltage direct charging scheme, the two-way communication between the mobile phone terminal and the charger improves the safety of charging, and can realize high-current charging with high efficiency. [0003] The block diagram of the most basic half-voltage circuit is as follows: figure 1 As shown, a single module usually uses four NMOS transistors as switches inside the half-voltage...
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IPC IPC(8): H02J7/00
CPCH02J7/0029H02J7/0088
Inventor 魏华兵
Owner VIVO MOBILE COMM CO LTD