Hybrid-Mode Charging Circuit for Adapter-Compatible Fast Charging
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Solution Overview
Problem
Current fast charging technologies face inefficiencies and increased costs due to the need for multiple charging chips and adapters with continuous voltage regulation, leading to heating issues and compatibility problems with standard chargers.
Innovation Solution
A hybrid-mode charging circuit that dynamically switches between buck and charge pump modes based on adapter capabilities, using a hybrid-mode charging control circuit with transistors and capacitors to adapt charging protocols, allowing compatibility with various adapters and efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If charge pump fast charging technology is used to achieve high charging efficiency, then charging efficiency is improved, but compatibility with standard adapters deteriorates and device complexity increases
Solution Approach 1:
The charging circuit dynamically switches between charge pump mode and buck mode based on adapter detection. The control circuit identifies whether the connected adapter supports continuous voltage regulation and automatically selects the appropriate charging algorithm, enabling the system to adapt its operating mode in real-time rather than being fixed in one configuration.
Solution Approach 2:
The charging circuit is designed to perform multiple functions: it can operate in charge pump mode when paired with PPS adapters for high efficiency, and switch to buck mode when paired with standard adapters for compatibility. This multi-functional design allows a single charging device to work with various adapter types without requiring separate dedicated circuits.
2Loss of energy
If charge pump fast charging technology is used to achieve high charging efficiency, then charging efficiency is improved, but device complexity and cost increase due to requiring multiple charging chips
Solution Approach 1:
The patent integrates both charge pump and buck charging functionalities into a single unified charging circuit. By merging these two previously separate charging paths into one hybrid circuit design, the system eliminates the need for separate dedicated charging chips for each mode, thereby reducing overall component count and device complexity while maintaining both charging capabilities.
3Productivity
If high-voltage buck fast charging is used to achieve fast charging, then charging speed is improved, but charging efficiency deteriorates causing serious heating problems
Solution Approach 1:
The system changes the operating parameters of the charging circuit based on the detected adapter type. When a PPS adapter is detected, the circuit switches to charge pump mode with different voltage and current parameters that achieve faster charging with higher efficiency. This parameter adaptation allows the system to optimize both speed and efficiency rather than being constrained to fixed high-voltage buck parameters.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hybrid-mode charging circuit achieves efficient fast charging across different adapters, reduces hardware costs and space, and maintains high efficiency while being compatible with both high-voltage buck and charge pump charging methods.
Implementation Method 1
a charge pump half-voltage fast charging circuit is shown in FIG. 2
Implementation Method 2
the voltage of the adapter is divided by half through a charge pump circuit
Implementation Method 3
the voltage of the adapter is reduced to a battery voltage by using a buck charging circuit
Implementation Method 4
High-voltage buck charging is generally used for a conventional mobile phone fast charging technology
Data Source
AI summary
A hybrid-mode charging circuit, and a charging method are provided. The hybrid-mode charging circuit includes a hybrid-mode charging control circuit, configured to determine whether an adapter supports continuous voltage regulation, where when the adapter does not support continuous voltage regulation, a transistor M5 and a transistor M6 are controlled to be turned off and a transistor M1, a transistor M2, a transistor M3, and a transistor M4 are controlled to work in a buck charging mode or a three-level buck mode; and when the adapter supports continuous voltage regulation, the adapter is controlled to output two times of battery voltage, the transistor M5 and the transistor M6 are controlled to be always in an on state, and the transistor M1, the transistor M2, the transistor M3, and the transistor M4 are controlled to be turned on or off alternately.