Buck-Boost Power Supply Controller with Fixed Phase Segmentation
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Solution Overview
Problem
Existing buck-boost switching power supply controllers have low efficiency and complex circuitry, leading to high costs.
Innovation Solution
A buck-boost power supply controller is configured to operate in three phases of a cycle, with one phase having a fixed duration, improving efficiency and simplifying implementation, and using a lower saturation current inductor to reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional buck-boost switching power supply controllers are used, then the system can operate in buck-boost mode, but the efficiency is low and the circuitry is complex
Solution Approach 1:
The switching cycle is segmented into three distinct phases: first phase with first and second switches closed, second phase with first switch open and second switch closed, and third phase with both switches open. This segmentation allows optimized control of power flow paths to improve efficiency while simplifying the overall control logic
Solution Approach 2:
The controller dynamically adjusts switch states based on the operating phase, transitioning between buck mode, boost mode, and idle phases. The duty cycle is dynamically controlled to optimize efficiency across different load conditions while maintaining simplified circuit architecture
2Adaptability or versatility
If complex circuitry is used to implement buck-boost system, then the system can achieve buck-boost operation, but the cost is high
Solution Approach 1:
The power supply controller is designed to universally handle both buck and boost operations through a unified three-phase control scheme. The same controller circuitry manages all operating modes, eliminating the need for separate control circuits and reducing overall system complexity and cost
Solution Approach 2:
The controller merges buck and boost control functions into a single integrated circuit that manages all switching operations. By combining the control logic for both modes into one unified controller, the patent reduces component count and manufacturing complexity while maintaining full buck-boost functionality
Data Source
AI summary
In one embodiment, a power supply controller is configured to operate a plurality of switches in a buck-boost mode to control an output voltage wherein at least one switch of the plurality of switches is enabled for a substantially fixed portion of a cycle of the buck-boost mode.