Hi,We're encountering an issue with the L6982CDR buck converter in our application. Here's the detailed scenario: Configuation: We're using it to convert a 24V input to a 5V output to power the board. Load: The 5V output supplies a load current of approximately 200mA. System Context: The same 24V input is also used to drive a stepper motor. Problem:Following mass production, some units have experienced a loss of the 5V output. The occurrence rate of this failure is low. Key Observations: This fault occurs during operation, not at power-up. The fault clears if the 24V power is restarted. When the failure happens, we measured a normal 24V input voltage and a normal voltage at the VCC pin of the IC. However, the SW pin output remains low. Notably, we have used this chip reliably for a long time, and this is a recent issue.
Here is the schematic of our product：
Here is the PCB of our product:
Please let me know if anything is unclear or if you need any tests performed We would appreciate your guidance on troubleshooting this.
