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Compensation method for charging sampling voltage and mobile terminal

A technology of sampling voltage and charging voltage, which is applied in the field of voltage compensation and can solve problems such as large errors

Active Publication Date: 2019-07-05
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the compensated reference voltage in the above method has a large error compared with the actual external charging voltage

Method used

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  • Compensation method for charging sampling voltage and mobile terminal
  • Compensation method for charging sampling voltage and mobile terminal
  • Compensation method for charging sampling voltage and mobile terminal

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Experimental program
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Embodiment Construction

[0060] Embodiments of the present invention provide a charging sampling voltage compensation method and a mobile terminal, which can reduce the error between the reference voltage and the actual external charging voltage.

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the des...

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Abstract

The invention provides a charging sampling voltage compensation method and a mobile terminal. The method comprises the steps that the function relationship between a voltage compensation value and charging sampling voltage is fit; when charging sampling voltage is detected, the function relation is used to calculate a voltage compensation value corresponding to the charging sampling voltage; the charging sampling voltage and the voltage compensation value are added; and the added voltage is used as the reference voltage for adjusting the charging current of the mobile terminal. According to the invention, error of the reference voltage with respect to actual external charging voltage can be reduced.

Description

technical field [0001] The invention relates to the technical field of voltage compensation, in particular to a compensation method for charging sampling voltage and a mobile terminal. Background technique [0002] Currently, when charging the mobile terminal, the mobile terminal can adaptively adjust the charging current based on the voltage difference of the charger, so as to adapt to the charging state of the mobile terminal itself. The mobile terminal can sample the charging voltage of the charger according to the configured PMIC (Power Management Integrated Circuit, integrated power management circuit) and its peripheral circuits. see figure 1 , figure 1 It is an equivalent circuit diagram for sampling the charging voltage. Such as figure 1 As shown, VCHR_IN is the external charging voltage of the mobile terminal, resistors R1 and R2 are the sampling circuit for VCHR_IN, and U2 is the charging sampling voltage. U2 is obtained by sampling the USB_IN1 and USB_IN2 pin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCH02J7/007H02J7/0071
Inventor 曾元清
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD