Switching Voltage Circuit for Wide Duty Ratio Control
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Solution Overview
Problem
Existing voltage converting devices struggle to generate a wide range of output voltages due to limited control over the duty ratio of switching elements, restricting the versatility and efficiency of voltage conversion.
Innovation Solution
A switching voltage generating device that includes an amplifier to generate an error voltage, a clock voltage generating circuit to produce a frequency-matched clock voltage, a triangular voltage generating circuit to generate cycle-matched triangular voltages, and a switching voltage generating circuit to produce switching voltages based on these inputs, enabling a wide range of duty ratios for the switching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional voltage converting devices use fixed-frequency switching control, then the device structure remains simple, but the duty ratio range is limited and output voltage versatility is restricted
Solution Approach 1:
The patent implements dynamic frequency adjustment of the clock signal based on the error voltage magnitude. The clock voltage generating circuit modifies the clock frequency according to the error voltage, enabling the switching element to achieve a wider duty ratio range. This dynamic adaptation allows the system to generate diverse output voltages without requiring complex multi-controller architectures, thus improving versatility while maintaining reasonable device complexity
Solution Approach 2:
The patent changes the frequency parameter of the clock signal dynamically based on the error voltage. By adjusting the clock frequency according to the error voltage magnitude, the system enables wider duty ratio control range. This parameter change approach allows a single controller to achieve multiple output voltage levels, resolving the contradiction between versatility and complexity
2Adaptability or versatility
If the duty ratio control range is extended to generate wider output voltage range, then voltage conversion versatility improves, but the control circuit complexity increases
Solution Approach 1:
The patent makes the single switching control circuit universal by enabling it to handle a wide range of duty ratios through dynamic frequency adjustment. The clock voltage generating circuit can produce different clock frequencies based on error voltage, allowing the same controller to achieve various output voltages. This multi-functionality eliminates the need for multiple specialized controllers, thus improving duty ratio range while avoiding proportional increase in circuit complexity
Solution Approach 2:
The patent utilizes parameter changes in the clock signal frequency to expand the duty ratio control range. By dynamically adjusting the clock frequency based on error voltage magnitude, the control circuit achieves wider duty ratio variation without requiring additional control circuits. This approach allows one circuit to perform multiple duty ratio adjustments, resolving the contradiction between duty ratio range and circuit complexity
Data Source
AI summary
A switching voltage generating device includes an amplifier configured to generate an error voltage, based on a adjusting target voltage of the voltage converting circuit and a detection voltage of the voltage converting circuit, a clock voltage generating circuit configured to generate a clock voltage having a frequency corresponding to the error voltage, based on the error voltage, a first fold reference voltage, and a second fold reference voltage, and to generate a clock switching voltage based on the error voltage and the switching reference voltage, a triangular voltage generating circuit configured to generate one or more triangular voltages having a cycle corresponding to a cycle of the clock voltage based on the clock switching voltage and the clock voltage, and a switching voltage generating circuit configured to generate the switching voltage based on the one or more triangular voltages and the error voltage.