Bootstrap Circuit Topology for Fast Capacitor Charge and Discharge
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Solution Overview
Problem
Current bootstrap circuits lack the capability for fast charging and discharging, which limits their dynamic range and efficiency in power management for high-voltage applications.
Innovation Solution
A bootstrap circuit design incorporating a first and second field-effect transistor, a capacitor, a switch module, and a voltage detection module, where the switch module is controlled by the voltage detection module to manage charging and discharging processes, enabling rapid voltage adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a traditional bootstrap circuit is used, then the circuit structure is simple, but the charging and discharging speed is slow
Solution Approach 1:
The patent applies dynamics by making the circuit configuration changeable through control signals. The first and second switches are controlled by a control signal to dynamically reconfigure the circuit topology, allowing the capacitor to be connected to different nodes (first node or second node) depending on the charging/discharging phase. This dynamic reconfiguration enables fast charging and discharging while maintaining manageable circuit complexity through systematic control.
Solution Approach 2:
The patent segments the bootstrap circuit into distinct functional blocks: a capacitor, a first switch, a second switch, and a control module. Each component has a specific function - the capacitor stores energy, the switches control current flow paths, and the control module manages the timing and sequencing. This segmentation allows independent optimization of each component and simplifies the overall design and analysis of the fast charging/discharging mechanism.
2Adaptability or versatility
If the capacitor charges slowly, then the circuit is stable, but the dynamic range is limited
Solution Approach 1:
The patent implements periodic action through alternating charging and discharging phases controlled by the control signal. The circuit periodically switches between charging mode (capacitor charges from the first node) and discharging mode (capacitor discharges to the second node). This periodic operation enables the circuit to achieve a wide dynamic range by rapidly transitioning between voltage states while maintaining stability through controlled, repetitive cycles rather than chaotic or uncontrolled changes.
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 enables fast charging and discharging of the capacitor, enhancing the dynamic range and efficiency of the bootstrap circuit, particularly in high-voltage applications, by controlling the switch module based on voltage detection.
Implementation Method 1
a capacitor, a switch module, a voltage detection module, and a voltage difference generation module; where one terminal of the capacitor is connected to the voltage output terminal, and the other terminal of the capacitor is connected to the first voltage input terminal
Implementation Method 2
a first field-effect transistor, a second field_effect transistor... a source of the first field_effect transistor is connected to a source of the second field_effect transistor through a first connection node
Data Source
AI summary
A bootstrap circuit supporting fast charging and discharging and a chip. A voltage measurement module (12) and a switch module (11) are arranged, and the voltage measurement module (12) controls an operating state of the switch module (11); during charging, under a specific condition, the switch module (11) is enabled to be in an on state so as to achieve fast charging of a voltage output end; and during discharging, the purpose of fast discharging is achieved by means of a second field effect transistor (MP5) arranged in the bootstrap circuit.