Switch Controller DC Gain Feedback for Converter Efficiency
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Solution Overview
Problem
Conventional converters require additional configurations to generate a reference voltage based on input voltage, which complicates their operation and efficiency.
Innovation Solution
A switch controller with a feedback information generator and a duty determining unit that uses a gain compensator to maintain a constant DC gain in the feedback transfer function, allowing the converter to generate a reference voltage without additional sensing configurations, thereby controlling the output voltage based on input voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a multi-input method is used to control output voltage according to input voltage, then converter efficiency is improved, but device complexity increases due to additional sensing configurations
Solution Approach 1:
The feedback information generator is designed to perform multiple functions: it generates the reference voltage based on input voltage sensing, processes output voltage feedback, and produces the duty control signal. This multi-functionality eliminates the need for separate sensing configurations, resolving the contradiction between efficiency improvement and device complexity
Solution Approach 2:
The patent merges the input voltage sensing function, reference voltage generation, and feedback processing into a single integrated feedback information generator. This consolidation achieves the efficiency benefits of multi-input control while avoiding the complexity of additional separate sensing circuits
2Device complexity
If output voltage is maintained at constant level, then device simplicity is preserved, but converter efficiency deteriorates due to increased switching and conduction losses
Solution Approach 1:
The patent implements dynamic output voltage control that adjusts the output voltage level according to the input voltage through the feedback information generator. This dynamic adjustment reduces switching and conduction losses while maintaining a relatively simple control configuration, resolving the contradiction between device simplicity and efficiency
Solution Approach 2:
The system changes the output voltage parameter dynamically based on input voltage conditions. The feedback information generator modifies the reference voltage and duty cycle parameters to optimize efficiency across different operating conditions, achieving efficiency improvement without complex additional configurations
Data Source
AI summary
The present invention relates to a switch controller and a converter having the same. The converter according to the present invention includes a power transfer device that transmits input power to an output terminal as output power, a power switch connected to a first end of the power transfer device and that controls power transmission of the power transfer device, and a switch controller that controls switching operation of the power switch. The switch controller receives an output voltage detection signal corresponding to an output voltage according to the power transmitted from the power transfer device, generates a duty control signal corresponding to a difference between the output voltage detection signal and a reference signal for controlling the output voltage, and determines turn-on/off of the power switch by using the duty control signal, and a DC gain of a feedback transfer function between the reference signal and the output voltage has a constant value.