Single Inductor Voltage Converter for Dual Polarity Output
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Solution Overview
Problem
Existing voltage converters for microelectronic devices and display panels require multiple inductors and capacitors to produce multiple voltage levels, increasing circuit area and manufacturing costs.
Innovation Solution
A voltage converter design using a single inductor and feedback control circuit to produce both positive and negative voltages, eliminating the need for multiple inductors and capacitors by controlling the inductor's charging through a feedback control circuit to output capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple inductors and capacitors are used to produce multiple voltage levels, then the voltage conversion function is achieved, but the circuit area and manufacturing cost increase
Solution Approach 1:
The patent merges multiple voltage conversion functions into a single inductor by utilizing both sides of the inductor for different voltage outputs. The inductor is shared between positive voltage generation (through switch S1 and capacitor C1) and negative voltage generation (through switch S2 and capacitor C2), eliminating the need for separate inductors for each voltage level.
Solution Approach 2:
The single inductor performs multiple functions: it generates positive voltage when switch S1 is closed, generates negative voltage when switch S2 is closed, and serves as a common energy storage element for both voltage conversion paths. This multi-functionality reduces the total component count and circuit area.
2Adaptability or versatility
If multiple inductors and capacitors are used to produce multiple voltage levels, then the voltage conversion function is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple voltage generation functions into a single inductor structure, reducing the total number of passive components (inductors and capacitors) required. This reduction in component count directly lowers manufacturing costs while maintaining the ability to generate multiple voltage levels.
Solution Approach 2:
The single inductor serves multiple voltage generation purposes, replacing what would traditionally require multiple dedicated inductors. This universal component approach simplifies the bill of materials and reduces manufacturing complexity and cost.
3Manufacturing precision
If feedback control circuit is used to control inductor charging, then voltage control accuracy is improved, but the device complexity increases
Solution Approach 1:
The feedback control circuit monitors the output voltages and adjusts the switching timing and duration of switches S1 and S2 to maintain accurate voltage levels. This feedback mechanism ensures precise voltage control by continuously comparing actual output with target values and making real-time adjustments to the inductor charging cycles.
Solution Approach 2:
The control system dynamically adjusts the switching parameters (timing, duration, frequency) of switches S1 and S2 based on feedback signals, enabling adaptive voltage regulation. This dynamic control allows the system to maintain accuracy under varying load conditions while using a relatively simple switching architecture.
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 design reduces circuit area and manufacturing costs while ensuring accurate voltage control for multiple voltage levels, enhancing efficiency and reducing component requirements.
Implementation Method 1
The inductor is coupled between a power supply and a reference voltage for providing a supply voltage... receive the supply voltage for producing a positive voltage and a negative voltage
Data Source
AI summary
The present invention relates to a voltage converter, which uses an inductor coupled between a power supply and a reference voltage for providing a supply voltage. A plurality of output capacitors are coupled to both sides of the inductor, respectively, and receive the supply voltage for producing a positive voltage and a negative voltage. A plurality of output switches are coupled to both sides of the inductor, respectively, and control the inductor to charge the plurality of output capacitors. A feedback control circuit produces a control signal according to the positive and negative voltages for controlling the plurality of output switches. Thereby, the present invention can produce positive and negative voltage by means of the inductor. Accordingly, the voltage converter according to the present invention avoids usage of multiple inductors and capacitors in producing voltages with different levels, and thus reducing the circuit area as well as the manufacturing cost.