Multi-Function Pin Circuit for Flexible Power Converter Configuration
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Solution Overview
Problem
The limited number of integrated circuit pins in power conversion circuits restricts function setting, as existing multi-function pins can only be used for specific functions, such as soft-start, and not for other settings due to the need for external components like capacitors or resistors, limiting flexibility.
Innovation Solution
A power conversion circuit with a multi-function pin that can be coupled to an external setting circuit, featuring a judging circuit that provides a setting current to generate voltage and determine the type of external setting circuit, allowing activation of appropriate function circuits for soft-start or multi-function settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-function pin is coupled to an external capacitor for soft-start, then soft-start function is achieved, but the pin cannot be used for other function settings
Solution Approach 1:
The patent makes the pin universally functional by introducing a judging circuit that automatically detects whether an external capacitor or resistor is connected and activates the appropriate function (soft-start or parameter setting). This allows the same pin to serve multiple purposes without requiring separate dedicated pins for each function, directly resolving the contradiction between pin versatility and circuit complexity.
Solution Approach 2:
The patent changes the operational parameters of the pin based on the detected external component type. The judging circuit measures voltage characteristics to determine whether a capacitor or resistor is connected, then dynamically switches the pin's function accordingly. This parameter-based detection and switching mechanism enables one pin to adaptively perform different functions without increasing overall circuit complexity.
2Adaptability or versatility
If the number of integrated circuit pins is limited, then device size is reduced, but function setting options are restricted
Solution Approach 1:
The patent applies multi-functionality by enabling existing pins to perform multiple roles through the judging circuit. Instead of adding more pins to increase function setting options, the system makes each pin adaptable to different configurations based on external component detection. This resolves the contradiction by achieving greater functional versatility without increasing the physical quantity of pins.
Solution Approach 2:
The judging circuit enables pins to automatically determine their own function based on the external components connected to them. The system self-configures by detecting whether a capacitor or resistor is present and activating the appropriate mode without requiring additional control pins or complex external configuration circuits. This self-service mechanism increases function setting options while maintaining a limited pin count.
3Adaptability or versatility
If existing multi-function pins only receive voltage by coupling an external resistor, then parameter setting is achieved, but soft-start function is lost
Solution Approach 1:
The patent uses parameter changes by measuring the voltage characteristics produced by different external components (capacitor vs. resistor) and using these voltage parameters to determine the appropriate function to activate. This voltage-based detection method reliably distinguishes between component types and ensures the correct function is activated, resolving the contradiction between functional versatility and reliable function activation.
Solution Approach 2:
The judging circuit implements feedback by continuously monitoring the voltage at the multi-function pin and using this feedback information to determine which function should be activated. The circuit receives feedback from the external component connection and automatically adjusts its operation accordingly, ensuring reliable function activation while maintaining adaptability to different configurations.
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
Enables automatic determination of the external setting circuit type, allowing for flexible activation of soft-start or multi-function settings, thereby overcoming the limitations of pin scarcity and enhancing functionality.
Implementation Method 1
The judging circuit provides a setting current to the multi-function pin so that the external setting circuit generates a voltage according to the setting current
Data Source
AI summary
The disclosure provides a power conversion circuit with a multi-function pin and a multi-function setting method thereof. The multi-function pin is coupled to an external setting circuit. The power conversion circuit includes a first function circuit, a second function circuit, and a judging circuit. The first function circuit is coupled to the multi-function pin. The second function circuit is coupled to the multi-function pin. The judging circuit is coupled to the multi-function pin, the first function circuit, and the second function circuit. The judging circuit provides a setting current to the multi-function pin, so that the external setting circuit generates a voltage according to the setting current. The judging circuit judges the type of external setting circuit according to voltage so as to activate the first function circuit or the second function circuit accordingly. The disclosure also provides a multi-function setting method in which the power conversion circuit automatically activates the corresponding function according to the type of external setting circuit.