关键词: 气体传感器, 失效分析

Abstract: The gas sensor module uses CKS32F030F4P6 as the main control chip. The module fails during production, with a defective rate of 50%. The failure phenomenon is that the sensor module crashes during turning on the laser tube and can't continue to execute instructions. It is analyzed that the current is too large during the laser tube's turn-on process, causing the output voltage of the power module inside the CKS32F030F4P6 to be too large, and the output voltage exceeds the normal working voltage of the internal working area. An error occurred during flash read and write operations, eventually causing the system to enter HardFault. The solutions are given from the aspects of hardware and software, which can effectively solve the problem of product failure.

Key words: gassensor, failureanalysis