Power Supply Controller Detection Circuit Single Terminal
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Solution Overview
Problem
Existing power supply controllers require two terminals to detect over-temperature and over-voltage conditions, limiting their ability to incorporate other features due to terminal constraints and resulting in inaccurate voltage monitoring.
Innovation Solution
A power supply controller is designed to detect over-voltage and over-temperature conditions using a single input, employing a detection circuit with a zener diode and NTC resistor to generate a sense signal, allowing for accurate condition monitoring without the need for multiple terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate terminals are used to detect over-voltage and over-temperature conditions, then detection functionality is achieved, but the number of available terminals for other functions is reduced
Solution Approach 1:
The patent combines over-voltage and over-temperature detection functions into a single terminal by merging the detection circuits. The first detection circuit monitors voltage at the single terminal, while the second detection circuit monitors temperature and both feed into a unified detection system that uses one terminal for both conditions, thereby freeing up other terminals for additional functions.
Solution Approach 2:
The single terminal is designed to serve multiple functions: it acts as both a voltage monitoring point and a temperature sensing location. The detection circuits are configured to extract both voltage and temperature information from this single terminal, making it a multi-functional interface that improves terminal utilization.
2Adaptability or versatility
If multiple circuits are used to monitor voltage changes for condition detection, then detection coverage is improved, but detection accuracy decreases due to circuit inaccuracies
Solution Approach 1:
The patent extracts the voltage monitoring function from complex multi-circuit arrangements and isolates it into a dedicated first detection circuit that directly monitors voltage changes at the terminal. This simplification removes the accumulation of errors from multiple cascaded circuits while maintaining comprehensive detection coverage through separate temperature monitoring.
3Reliability
If two terminals are dedicated to condition detection, then accurate condition monitoring is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the terminal requirements for voltage and temperature detection into a single shared terminal. The detection circuits are integrated to process both voltage and temperature signals from this single terminal, reducing the overall terminal count and simplifying the device configuration while maintaining monitoring accuracy through dedicated detection pathways.
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
This solution enables accurate detection of both over-voltage and over-temperature conditions using a single input, freeing up terminals for other functions and improving detection accuracy, thereby enhancing the power supply controller's functionality and reducing costs.
Implementation Method 1
employing a detection circuit with a zener diode and NTC resistor to generate a sense signal
Implementation Method 2
employing a detection circuit with a zener diode and NTC resistor to generate a sense signal
Data Source
AI summary
In one embodiment, a power supply controller is configured to use a current to detect two different operating conditions on a single input terminal.