DC-DC Converter Mode Switching at Buck-Boost Boundaries
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional DC-DC conversion technologies have lower than desired efficiency at the boundary of buck operation and buck-boost operation, or alternately, at the boundary of boost operation and buck-boost operation.
Innovation Solution
A DC-DC converter with an electronic switch network and control logic circuitry that dynamically switches between buck, boost, and buck-boost operations based on measured current flow and predetermined current values, optimizing efficiency across operational boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional DC-DC conversion technology is used, then voltage conversion is achieved, but efficiency is lower than desired at the boundary of buck and buck-boost operation or boost and buck-boost operation
Solution Approach 1:
The patent implements dynamic mode selection that automatically transitions between buck, boost, and buck-boost operations based on real-time voltage and current conditions. The control circuitry dynamically adjusts the switching network configuration to maintain optimal efficiency across varying operational boundaries, rather than being fixed in a single mode.
Solution Approach 2:
The system changes operational parameters (switching modes) based on detected voltage and current thresholds. By monitoring input/output voltage differential and load conditions, the controller transitions between different conversion modes to maintain high efficiency across the full operating range, particularly at boundaries where traditional fixed-mode converters fail.
2Power
If advanced higher capacity battery technology is used, then power requirements are met, but operating voltage is lower and incompatible with existing PA technology
Solution Approach 1:
The DC-DC converter is designed to perform multiple functions: it can operate in buck mode when input voltage exceeds output voltage, in boost mode when input voltage is below output voltage, and in buck-boost mode at transition boundaries. This multi-functionality ensures compatibility with both high-capacity low-voltage batteries and existing PA technology requiring higher voltages.
3Reliability
If DC-DC conversion technology is used to boost voltage, then compatibility with PA technology is achieved, but efficiency is reduced at operational boundaries
Solution Approach 1:
The control circuitry continuously monitors input voltage, output voltage, and current conditions to detect when the converter approaches operational boundaries. Based on this feedback, the system proactively transitions between modes before efficiency degrades, maintaining optimal performance across the full operating range including boundary conditions.
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 achieves higher conversion efficiency at the boundaries of buck and buck-boost, or boost and buck-boost operations, thereby extending handset operation time or reducing the size of handsets while maintaining compatibility with existing PA technology.
Implementation Method 1
An inductor is coupled between the first inductor node and the second inductor node. Control logic circuitry is configured to cause the electronic switch network to couple the inductor between the supply node and the output node to provide current flow through the inductor for a fixed time period
Data Source
AI summary
A DC-DC converter is disclosed having an electronic switch network having a supply node, a ground node, an output node, a first inductor node, a second inductor node, and switch control inputs. An inductor is coupled between the first inductor node and the second inductor node. Control logic circuitry has switch control outputs coupled to the switch control inputs, wherein the control logic circuitry is configured to cause the electronic switch network to couple the inductor between the supply node and the output node to provide current flow through the inductor for a fixed time period, and at the end of the fixed time period to measure a check time period until the current flow through the inductor is equal to predetermined current value, and based upon the measured check time period to determine to switch between buck operation and boost operation or boost operation and buck operation.