Capacitive Boost Circuit With Three Switches For Power Supply Control
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Solution Overview
Problem
Existing power supply control systems suffer from inefficiencies due to losses in inductors and passive elements, particularly with increasing voltage gain ratios, leading to undesirable power losses and inefficient operation.
Innovation Solution
A power supply control circuit is designed to regulate the inductor current and output voltage by using a capacitive boost circuit with three switches, operating at a frequency to control the duty cycle and voltage applied to the inductor, allowing for multiple increase and decrease rates of current flow, thereby optimizing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the operating frequency is increased to improve power delivery speed, then the power delivery speed is improved, but the power losses in inductor and passive elements increase
Solution Approach 1:
The patent implements periodic action by using a control circuit that switches power devices in periodic cycles, controlling the duty cycle to regulate power delivery. The control circuit generates periodic control signals to switch the power devices on and off, achieving efficient power transfer while minimizing losses through optimized switching timing and duty cycle control.
2Reliability
If the duty cycle is increased to improve voltage regulation, then the voltage regulation is improved, but the current draw from capacitor increases
Solution Approach 1:
The patent implements feedback by using a control circuit that monitors the output voltage and adjusts the duty cycle accordingly. The control circuit receives feedback signals representing the actual output voltage level and dynamically modifies the switching duty cycle to maintain precise voltage regulation while optimizing capacitor current draw through closed-loop control.
Data Source
AI summary
In one embodiment, a power supply control circuit may include a capacitive boost circuit having only three switches and only one boost capacitor. The capacitive boost circuit may be configured to receive an input voltage and form a first voltage to apply to an inductor. A control circuit of the power supply control circuit may be configured to switch an inductor switch at a first frequency to regulate the output voltage to the desired value, to switch the three switches at substantially the same frequency, and to adjust a duty cycle of the three switches.