Voltage Controlled Charge Pump Feedback Regulation
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in efficiently managing voltage variations across different devices, often requiring additional controllers to ensure voltage compatibility, which increases complexity and cost.
Innovation Solution
A voltage controlled charge pump with a feedback path and controller that selectively opens and closes switches to limit the output voltage based on the voltage level of the battery, allowing for independent voltage regulation without additional controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional controllers are used to manage voltage variations in wireless power transfer systems, then voltage compatibility is ensured, but device complexity and cost increase
Solution Approach 1:
The patent combines the voltage regulation function with the existing charge pump circuit by adding a feedback path that monitors output voltage and controls the charge pump's switching operation. This integration eliminates the need for separate additional controllers, as the charge pump itself performs both power transfer and voltage regulation functions through feedback-controlled switching.
Solution Approach 2:
The patent implements a feedback mechanism where the output voltage is monitored and fed back to control the charge pump's switching operation. This feedback loop enables the charge pump to automatically adjust its operation to maintain voltage compatibility, replacing the need for additional dedicated voltage management controllers.
2Reliability
If additional controllers are used to ensure voltage compatibility, then voltage management is improved, but cost increases
Solution Approach 1:
The patent merges the voltage regulation function into the charge pump circuit itself, utilizing the existing hardware infrastructure. By making the charge pump feedback-controlled, the system achieves voltage compatibility management without requiring additional controller components, thereby reducing manufacturing cost while maintaining reliability.
3Device complexity
If voltage regulation is implemented without additional controllers, then device complexity is reduced, but voltage control precision may worsen
Solution Approach 1:
The patent employs a feedback mechanism that continuously monitors the output voltage and adjusts the charge pump's switching operation accordingly. This feedback control enables precise voltage regulation to be achieved through the existing charge pump circuit, maintaining voltage control precision without requiring additional complex controller hardware.
4Loss of energy
If charge pump is directly coupled to load, then power dissipation is reduced, but voltage management complexity increases
Solution Approach 1:
The patent combines the voltage management function with the charge pump operation itself by implementing feedback control on the charge pump's switching. This integration allows the charge pump to directly couple to the load while maintaining precise voltage management, avoiding the need for additional intermediate voltage management stages that would increase complexity and power dissipation.
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
Enables efficient and cost-effective voltage management across a wide range of input voltages, reducing power dissipation and dropout, and simplifying the charging process by directly coupling the charge pump to the load.
Implementation Method 1
The charge pump may include a feedback path and controller configured to control operation of the charge pump based on information from the feedback path
Data Source
AI summary
Certain aspects of the present disclosure relate to methods and apparatus for a voltage controlled charge pump and battery charger. Certain aspects of the present disclosure provide a method for operating a voltage controlled charge pump. The method includes selectively opening and closing a plurality of switches based on a voltage on a feedback path. The plurality of switches are coupled between a voltage input terminal and a voltage output terminal. A first capacitor is coupled between at least a first switch and a second switch of the plurality of switches. A second capacitor is coupled to the voltage output terminal. The feedback path is coupled to at least one of the voltage output terminal, the first capacitor, and the second capacitor.