Program Burning Interface Self-Test for Current Protection Failure
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Solution Overview
Problem
Integrated program burning devices fail to detect overcurrent protection circuit failures in a timely manner, leading to potential malfunction when hardware issues arise, as the overcurrent protection circuit is only triggered under abnormal hardware conditions and not during normal operation.
Innovation Solution
A program burning device equipped with a microprocessor that outputs test signals of varying voltage levels to trigger overcurrent and undercurrent protections, determining the functionality of the overcurrent protection circuit by attempting to trigger these protections multiple times and sending a warning if failures persist.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the overcurrent protection circuit is only triggered under abnormal hardware conditions, then the device operates normally during integration, but the failure of the overcurrent protection circuit cannot be detected in time after long-term usage
Solution Approach 1:
The patent applies preliminary action by implementing a self-test function that actively tests the overcurrent protection circuit before actual hardware failures occur. The microprocessor outputs test signals to deliberately trigger the protection circuit during normal operation, allowing early detection of protection circuit failures rather than waiting for abnormal hardware conditions to manifest
Solution Approach 2:
The patent implements self-service by enabling the program burning device to automatically test its own overcurrent protection circuit without requiring external testing equipment. The microprocessor generates test signals and monitors the protection circuit's response, allowing the system to self-diagnose protection circuit functionality and alert users to potential issues
2Area of stationary object
If the program burning device integrates auxiliary independent components together, then space is saved, but the overcurrent protection circuit cannot be tested without external tools
Solution Approach 1:
The patent applies universality by designing the microprocessor to perform multiple functions: it serves as both the control unit for normal device operation and as a test signal generator for protection circuit testing. The same microprocessor that controls program burning operations also generates test signals and monitors protection circuit responses, eliminating the need for separate external testing equipment
Solution Approach 2:
The integrated device performs self-testing through the microprocessor's ability to generate test signals and monitor protection circuit responses internally. This self-service capability allows the compact integrated device to maintain testing functionality without requiring external tools, preserving ease of operation despite space constraints
Data Source
AI summary
The present disclosure a program burning device configured to read or write to a program burning interface. The program burning device includes a microprocessor, a programming drive circuit and an overcurrent protection circuit. The microprocessor outputs a first test signal or a second test signal. The programming drive circuit outputs a high driving voltage or a low driving voltage to the program burning interface. After the programming drive circuit outputs the low driving voltage for a preset time, the programming drive circuit outputs the high driving voltage to make the program burning interface form a high impedance. Afterwards, the overcurrent protection circuit receives the first test signal to trigger the overcurrent protection, and then receives the second test signal to trigger the undercurrent protection. If triggering the overcurrent protection and the undercurrent protection are continuously failed over a preset number of times, the microprocessor determines that current protection is failed.