player80
Full Member level 2
Hi,
today I went to a lab for testing the EMC.
When doing the ESD test my device started to fail (the sensor IC started to reset).
After I went home I started to think about why the IC was resetting and how to reproduce it, suddenly a mosquito bat came into my mind.
I have checked the spec of the bat and it says 2KV, 0.7w
I was able to reproduce the ESD test with it, and fix it by adding a 100nF to the reset line (RST is connected to the MCU with a 300ohm resistor in series and 4.7k to 3.3v). Now the bat is just sparking on the device and everything works fine.
Are those mosquito bats really suitable for such ESD gun tests? I have seen there are even mosquito bats with 4kV available.
We will do another lab test next week with the real ESD gun I'm curious about the new results.
today I went to a lab for testing the EMC.
When doing the ESD test my device started to fail (the sensor IC started to reset).
After I went home I started to think about why the IC was resetting and how to reproduce it, suddenly a mosquito bat came into my mind.
I have checked the spec of the bat and it says 2KV, 0.7w
I was able to reproduce the ESD test with it, and fix it by adding a 100nF to the reset line (RST is connected to the MCU with a 300ohm resistor in series and 4.7k to 3.3v). Now the bat is just sparking on the device and everything works fine.
Are those mosquito bats really suitable for such ESD gun tests? I have seen there are even mosquito bats with 4kV available.
We will do another lab test next week with the real ESD gun I'm curious about the new results.