We have during the past 10 years over 60000 devices with a TPIC1021 in use, and had never received a RMA with a defect TPIC1021 chip.
From a last production batch ca 2000 units are in use at one site, Till now we have already received over 40 devices with a defect TPIC1021.
The designs are CE tested and had no issues during immunity testing. They all should have had a functional test at the factory.
We try to investigate what the problem could be. Is it something special on this site or something with this batch of TPIC1021 chips.
As far as we know there is now high-power equipment on this site, only conveyor belts and packing machines.
question:
What kind of equipment would be needed to generate emissions above what is tested within the ce specification.that could destroy the TPIC1021 chip. The distance to other equipment is more than 15 meter.
Are you aware of problems with some batches of TPIC1021 chips?
Are there second sources or counterfeit TPIC1021 chips on the market?