Charge Pump Booster Circuit With Variable Capacitance Paths
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Solution Overview
Problem
Charge pump type booster circuits face challenges in maintaining a constant output voltage due to the requirement for large capacitance values, leading to increased manufacturing costs and difficulty in suppressing output voltage ripples, as they often rely on external capacitors which are costly and difficult to manage.
Innovation Solution
The implementation of a charge pump type booster circuit with multiple booster paths, each with different capacitance values, where the output voltage is alternately boosted by switching between paths based on control signals, allowing for reduced external capacitor count while maintaining a constant output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If multiple external capacitors are used to maintain constant output voltage, then output voltage stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple capacitor functions into a single external capacitor by using multiple internal capacitors within the IC chip. The first and second capacitors inside the chip work together with one external capacitor to achieve the same voltage stabilization effect that would otherwise require multiple external capacitors, thereby reducing component count and manufacturing cost while maintaining output voltage stability
Solution Approach 2:
The patent moves capacitor functionality from the external dimension to the internal dimension by integrating capacitors within the IC chip structure. Instead of placing multiple capacitors externally, the design incorporates first and second capacitors inside the chip, utilizing the internal dimensional space to reduce external component requirements and simplify the overall circuit architecture
2Stability of the object's composition
If multiple booster units are used to suppress output voltage ripples, then output voltage stability is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of multiple booster units into a single integrated circuit structure. The first and second boost circuits are combined within one IC chip, sharing common components such as the external capacitor connection points and control logic, thereby reducing overall circuit complexity while maintaining the ability to suppress output voltage ripples through coordinated operation of the internal capacitors
Solution Approach 2:
The single IC chip design provides multi-functionality by incorporating both first and second boost circuits that can operate independently or in coordination. The circuit can function as a unified booster system or selectively activate different paths, providing versatile voltage boosting capabilities without requiring separate discrete booster units, thus reducing device complexity while maintaining stability
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
This approach effectively suppresses the need for multiple external capacitors, reducing manufacturing costs and maintaining a stable output voltage, thereby addressing the limitations of existing charge pump type booster circuits.
Implementation Method 1
a first end of the second capacitor C2 is connected to a first end of the first capacitor C1 and a second end of the second capacitor C2 is connected to a second end of the first capacitor C1 and an input terminal Pin
Data Source
AI summary
A charge pump type booster circuit generates a positive or negative boosted output voltage by switching booster paths one by one. This charge pump type booster circuit includes a plurality of booster paths, each of the plurality of booster paths including at least one booster capacitor, wherein a number of the booster capacitor at each of the plurality of booster paths is different between one booster path and the other booster path. This makes it possible to suppress an increase in a number of an external capacitor for setting an output voltage of the booster circuit constant.