Switched-Capacitor Voltage Converter With Adaptive Gain Control
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Solution Overview
Problem
Conventional voltage converters for implantable medical devices are inefficient in managing different power requirements across various working modes due to complex circuits, high power consumption, and low system efficiency, making them unsuitable for modern medical devices.
Innovation Solution
A voltage converter with a switch capacitor converter core, a gain controller, and adaptive ADC, which adjusts the conversion gain ratio and switching frequency using a DFS algorithm to achieve efficient power supply, combining rough and fine adjustments to match output voltage with reference voltage, thereby optimizing power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional voltage converters are used to improve configurability, then the device can handle multiple working modes, but the circuit complexity increases, chip area increases, power consumption increases, and system working efficiency decreases
Solution Approach 1:
The patent implements dynamic switching between different conversion ratios (1:2, 1:1, 2:1) based on real-time detection of input voltage ranges. The voltage converter automatically adjusts its configuration to match the current working mode requirements, enabling adaptability without requiring multiple fixed configurations. This dynamic approach allows a single circuit to handle multiple working modes while maintaining simplicity.
Solution Approach 2:
The voltage converter is designed with universal functionality to handle three different conversion ratios using a single integrated circuit structure. The same basic circuit topology can operate in step-down mode (1:2), unity gain mode (1:1), or step-up mode (2:1) by dynamically reconfiguring the switching elements and capacitor connections, eliminating the need for separate dedicated circuits for each mode.
2Adaptability or versatility
If conventional voltage converters are used to improve configurability, then the device can handle multiple working modes, but the chip area increases
Solution Approach 1:
The patent uses dynamic reconfiguration of a single set of switching elements and capacitors to achieve multiple conversion ratios. The same physical components are dynamically assigned to different functional roles based on the detected input voltage range, maximizing component utilization and minimizing the total chip area required compared to having dedicated circuits for each mode.
Solution Approach 2:
The patent merges multiple voltage conversion functions (step-down, unity gain, step-up) into a single integrated circuit structure. By combining the switching elements, capacitors, and control logic into one unified design that can dynamically perform multiple functions, the chip area is significantly reduced compared to implementing separate dedicated circuits for each conversion ratio.
3Adaptability or versatility
If conventional voltage converters are used to improve configurability, then the device can handle multiple working modes, but the power consumption increases
Solution Approach 1:
The patent dynamically detects the input voltage range and automatically switches to the appropriate conversion ratio, ensuring optimal power transfer efficiency for each working mode. This prevents power loss that would occur with fixed-ratio converters operating outside their optimal range, as the converter continuously adapts to maintain efficient operation across all input conditions.
Solution Approach 2:
The patent changes the conversion ratio parameter dynamically based on input voltage conditions. By adjusting the conversion ratio to match the working mode requirements, the system optimizes power transfer efficiency and minimizes power loss, whereas conventional fixed-ratio converters would operate inefficiently across varying input conditions.
4Adaptability or versatility
If conventional voltage converters are used to improve configurability, then the device can handle multiple working modes, but the system working efficiency decreases
Solution Approach 1:
The patent dynamically adjusts the conversion ratio based on real-time input voltage detection, ensuring the system operates at optimal efficiency for each working mode. The automatic switching between conversion ratios eliminates the efficiency penalties associated with fixed-ratio converters that must operate suboptimally across varying conditions, thereby maintaining high system working efficiency throughout.
Solution Approach 2:
The patent optimizes system working efficiency by dynamically changing the conversion ratio parameter to match the current working mode requirements. This ensures maximum power transfer efficiency and minimizes losses, whereas conventional converters with fixed parameters cannot adapt to varying conditions and suffer from reduced efficiency.
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 results in a compact, low-power, high-efficiency voltage converter that effectively meets the diverse power needs of medical devices, reducing power consumption and improving system efficiency by fine-tuning output voltage.
Implementation Method 1
a switch capacitor converter core including a plurality of power transistor switches configured to receive an input voltage and output an output voltage
Data Source
AI summary
A voltage converter for medical devices includes a switch capacitor converter core including a plurality of power transistor switches configured to receive an input voltage and output an output voltage; a switch driver connected with the switch capacitor converter core and configured to turn on corresponding power transistor switches in the switch capacitor converter core so as to supply power to a load receiving the output voltage; a switch signal router connected with the switch driver and configured to selectively transmit signals required by the switch driver; a gain selection decoder connected with the switch signal router; a gain controller connected with the gain selection decoder, the gain selection decoder being configured to decode gain selection instructions transmitted from the gain controller; an input adjusting device connected with the gain controller and configured to receive the input voltage and a reference voltage, to indicate relationship between the input voltage and the reference voltage, and to transmit the relationship to the gain controller; and an output adjusting device connected with the gain controller and configured to receive the output voltage and the reference voltage, to indicate relationship between the output voltage and the reference voltage, and to transmit the relationship to the gain controller.