Charge Pump Internal External Capacitor Switch Module
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Solution Overview
Problem
Conventional charge pumps require large external capacitors, leading to increased circuit area and manufacturing costs, and struggle to maintain stable voltage levels due to the smaller internal capacitors.
Innovation Solution
A charge pump design that uses a combination of an internal capacitor and a single external capacitor, with a switch module controlling the charging and discharging of both capacitors to reduce circuit size and cost, while maintaining stable voltage levels through an internal capacitor boost circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charge pump uses two external capacitors, then voltage stability is improved, but circuit area and manufacturing cost increase
Solution Approach 1:
The patent extracts one capacitor function from the external components and relocates it to an internal capacitor within the IC. This reduces the number of external capacitors from two to one, thereby reducing circuit area and manufacturing cost while maintaining the voltage stability function through the internal capacitor's operation in the charge pump circuit
Solution Approach 2:
The patent embeds the capacitor function inside the IC chip itself by integrating an internal capacitor, similar to nesting a smaller component within a larger system. This internal capacitor works in conjunction with the reduced external capacitor to maintain voltage stability while minimizing external component requirements
2Reliability
If conventional charge pump uses two external capacitors, then voltage stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent removes the requirement for one external capacitor by extracting its functional role and implementing it through an internal capacitor integrated within the IC. This reduction in external component count directly lowers assembly complexity and manufacturing cost while preserving voltage stability through the internal capacitor's operation
Solution Approach 2:
The internal capacitor serves the dual purpose of being both a functional component for voltage stability and an integrated element that reduces external component requirements. The charge pump circuit uses the internal capacitor to perform its voltage regulation function, making the system self-sufficient and reducing dependency on external components
3Use of energy by moving object
If charge pump operates in different loading current modes, then power saving is improved, but control complexity increases
Solution Approach 1:
The patent implements dynamic operation modes that allow the charge pump to switch between different loading current modes (first and second modes with different current levels). This dynamic adaptability enables the circuit to optimize power consumption based on operational requirements while the switch module manages the complexity of mode transitions
Solution Approach 2:
The charge pump operates in periodic cycles, alternating between charging and discharging phases of the internal capacitor. This periodic operation allows the circuit to efficiently manage power consumption by activating components only when needed, reducing overall power usage while maintaining functional performance
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 solution results in a charge pump with a smaller circuit area, lower manufacturing costs, and the ability to operate in different loading current modes, ensuring stable voltage and power saving in electronic devices.
Implementation Method 1
an internal capacitor disposed inside an integrated circuit (IC)... controls the internal capacitor to discharge to the output terminal... controls the external capacitor to discharge to the internal capacitor
Data Source
AI summary
A charge pump including an output terminal, an external capacitor, and a switch module is provided. The output terminal is coupled to an internal capacitor disposed inside an integrated circuit (IC). The external capacitor is disposed outside the IC. The switch module, coupled to the external capacitor and the internal capacitor configured to control the external capacitor and the internal capacitor to charge and discharge by turns. In a first operating period, the switch module controls the external capacitor to charge without providing current to the output terminal, and controls the internal capacitor to discharge to the output terminal.