Asynchronous Half-Bridge Control for Reconfigurable DC/DC Regulators
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Solution Overview
Problem
Conventional DC/DC regulators are limited by fixed converter behaviors, reliance on external components, and inability to configure switch modes, leading to inefficiencies and potential circuit damage from voltage fluctuations.
Innovation Solution
A device with an asynchronous state machine and signal generator that controls switches in half-bridge configurations, allowing flexible operation in buck, boost, or buck-boost modes, and includes multiplexers to manage switch signals, enabling independent control of each half-bridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional DC/DC regulators use fixed converter behaviors with hard-wired configurations, then device complexity is reduced, but adaptability and versatility are limited
Solution Approach 1:
The patent implements dynamic configurability by allowing the DC/DC regulator to switch between different operating modes (buck, boost, buck-boost) and topologies through programmable control. The controller can be configured via software or hardware settings to adapt the converter behavior, transforming a static fixed configuration into a dynamic reconfigurable system that responds to different operational requirements.
Solution Approach 2:
The patent creates a universal DC/DC regulator platform that can perform multiple functions - operating as buck converter, boost converter, or buck-boost converter depending on configuration. This multi-functional approach allows a single device to replace multiple dedicated converters, achieving versatility without proportionally increasing complexity through standardized control architecture.
2Reliability
If conventional DC/DC regulators rely on external free-wheeling diodes, then device complexity is reduced, but reliability decreases due to voltage fluctuations and potential circuit damage
Solution Approach 1:
The patent extracts the free-wheeling diode function from external passive components and integrates it into the main switching structure through synchronous rectification. By using active MOSFET switches instead of passive diodes, the system eliminates the need for external free-wheeling diodes while providing better control over the freewheeling current path, thereby improving reliability and power efficiency.
Solution Approach 2:
The patent implements self-service by having the converter switches themselves perform the free-wheeling function that was previously handled by external diodes. The switching controller manages the body diodes or synchronous MOSFETs to provide continuous current flow during the off-state, making the system self-sufficient and eliminating dependency on external protective components.
3Productivity
If conventional DC/DC regulators use asynchronous topologies with external diodes, then ease of manufacture is improved, but productivity and efficiency are reduced
Solution Approach 1:
The patent replaces the mechanical/passive diode-based free-wheeling mechanism with electronic active switching control. By using MOSFETs with controlled gate signals, the system achieves synchronous rectification that reduces conduction losses and improves power conversion efficiency, substituting passive component-based operation with active electronic control.
4Adaptability or versatility
If conventional DC/DC regulators have fixed half-bridge configurations, then device complexity is reduced, but adaptability is limited
Solution Approach 1:
The patent implements dynamic control of half-bridge configurations through programmable switching signals. The controller can dynamically adjust the timing, duration, and sequence of gate signals to different half-bridge switches, allowing the same physical circuit to operate in different topological configurations (buck, boost, buck-boost) based on control parameters rather than fixed wiring.
Data Source
AI summary
A device includes a signal generator configured to generate signals to control first and second switches coupled in a first half-bridge DC-DC converter configuration, the first and second switches being configured in a buck mode of operation or in a boost mode of operation.