Charging Circuit Dynamics for Voltage Mode Adaptation

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Solution Overview

Problem

Electronic devices are limited to charging in either high voltage or low voltage modes, restricting their compatibility with various charging devices and degrading user experience.

Innovation Solution

A charge control method and device that determines the charging mode supported by the connected charging device, allowing the charging circuit to operate in either high voltage or low voltage mode, enabling compatibility with different charging devices and improving user experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the electronic device supports only high voltage charging mode, then the charging speed is improved, but the compatibility with charging devices is reduced

Engineering Contradiction:

Improvecharging speedVSAvoidcompatibility with charging devices

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The charging circuit dynamically switches between high voltage charging mode (using MOSFET-1 and MOSFET-2 alternately) and low voltage charging mode (using MOSFET-3 always on) based on the charging device type detected by the detection unit, enabling both fast charging capability and broad compatibility

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the electronic device supports only low voltage charging mode, then the compatibility with charging devices is improved, but the charging speed is reduced

Engineering Contradiction:

Improvecompatibility with charging devicesVSAvoidcharging speed

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The charging circuit dynamically switches between low voltage charging mode (MOSFET-3 always on) and high voltage charging mode (MOSFET-1 and MOSFET-2 alternately) based on the charging device type detected by the detection unit, enabling both broad compatibility and fast charging capability

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If separate charging circuits are provided for high voltage and low voltage modes, then the adaptability is improved, but the device complexity is increased

Engineering Contradiction:

Improvesupport for multiple charging modesVSAvoidcharging circuit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges high voltage charging components (MOSFET-1, MOSFET-2, inductor) and low voltage charging components (MOSFET-3) into a single integrated charging circuit, controlled by a detection unit and control unit that switch between modes based on the connected charging device type

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3200311B1Method and device for controlling charging and electronic device

Publication Date: 2022.01.19 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

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AI summary

The present disclosure provides a charge control method and device and an electronic device, applied in the electronic device, and enabling the electronic device to support the charging in a high voltage charging mode and the charging in a low voltage charging mode, in which the electronic device includes a charging interface, a charging circuit and a battery coupled in series. The method includes: when a charging device is coupled with the charging interface, determining, by a charge control device, a charging mode supported by the charging device as the high voltage charging mode or the low voltage charging mode, in which a charging voltage of the high voltage charging mode is greater than a charging voltage of the low voltage charging mode; controlling the charging circuit by the charge control device according to the charging mode supported by the charging device, such that the charging circuit charges the battery in the charging mode supported by the charging device.