2 Replies Latest reply on Jan 10, 2019 11:55 PM by alorc_1168841

    CY8C5467AXI-LP108 Component overheating


      Hello everybody, I'm new to this community.

      In our company we are using the CY8C5467AXI-LP108 processor to control the pendant of our cnc machines. It manages an LCD, a keyboard, 4 status leds and Modbus RTU communication.

      The design, layout and the components of the pendant's board have been the same for the last 5 years, and about 200 of these pendants have been produced. Recently we started to have some issues with the latest produced. In particular in 4 pendants the inputs from keyboard stopped working periodically (5-6 times a day) and only a power cycle of the board seemed to solve the problem. Then we discovered that when this happens the processor is very hot at touch, I think about 60-70°C, when normally it is at 30°C. The strange thing is that after power cycling the pendants they starts to work correctly and the temperature of the chip decreases to normal until after some hours it rapidly becomes hot again and manifest function issues. No other components of the board are hot apart of the processor.

      We already checked the boards for missing components, wrong resistances etc, but they are ok (they are pre-assembled by our supplier). Also the issue is sporadic and happens when the pendant is not in use but powered.

      Could it be a chip issue?