Short-Circuit Detection and Switch Isolation in Power Output Circuits
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Solution Overview
Problem
Electronic components prone to short-circuit failures disrupt the normal operation of electronic devices, necessitating a solution to ensure other components continue functioning.
Innovation Solution
An electronic device with a short circuit protection function incorporating a first switch, a detection circuit, and a second switch to manage the first switch's state based on detection results, preventing the short circuit's impact on the output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a short circuit protection circuit is added to detect and respond to short circuit failures, then the reliability of the electronic device is improved, but the device complexity increases due to additional components like detection circuits and control switches
Solution Approach 1:
The patent introduces a detection circuit as an intermediary component that monitors the electronic component for short circuit failures. This mediator detects the fault condition and triggers the control switch to isolate the failed component, thereby protecting the overall system reliability while managing complexity through functional specialization
Solution Approach 2:
The protection circuit is segmented into distinct functional modules: a detection circuit for monitoring, a control switch for isolation, and the main circuit. This segmentation allows each component to perform its specific function independently, improving reliability through modular fault isolation while making the overall system more manageable despite increased complexity
2Reliability
If switches and detection circuits are added to protect against short circuit failures, then the protection capability is improved, but the manufacturing cost increases due to additional components and assembly steps
Solution Approach 1:
The detection circuit automatically monitors the electronic component and triggers the control switch to open when a short circuit is detected, enabling the system to protect itself without external intervention. This self-service capability improves protection capability while reducing the need for complex manual protection mechanisms, potentially lowering manufacturing costs
3Reliability
If the first switch is controlled to open upon detecting a short circuit, then the safety of the electronic device is improved, but the operational time is reduced due to interruption of power supply to the electronic component
Solution Approach 1:
The control switch is pre-configured to open and isolate the electronic component when a short circuit is detected, preventing the fault from propagating to other parts of the system. This preliminary protective action ensures safety by stopping power supply to the failed component before it can cause further damage, accepting temporary operational interruption as necessary for system protection
Data Source
AI summary
An electronic device with a short circuit protection function is provided. The electronic device includes a first switch, a detection circuit and a second switch. The first switch is disposed between an output node and an electronic component, a power converter provides an output voltage to the output node, and a to-be-protected circuit is connected to the output node. The detection circuit is configured to detect whether or not a short circuit failure occurs in the electronic component. The second switch is connected to a first control terminal of the first switch, and the second switch determines whether to control the first switch to be turned off according to a detection result of the detection circuit. In response to the detection circuit detecting that the short circuit failure occurs in the electronic component, the second switch is used to control the first switch to be turned off.