Hi to all. I have a question about my Rdson testing. I have been reading in the internet but until now I haven't found the answer. We have a device tested 4 times for Rdson. Below are the test configurations:
1st test: Vgs = 10 and Id = 30
2nd test: Vgs = 10 and Id = 15
3rd test: Vgs = 4.5 and Id = 30
4th test: Vgs = 4.5 and Id = 15
The difference of the Rdson reading for the 1st and 2nd test is less than 1mohm but for the 3rd and 4th test they have greater than 1mohm difference. I also noticed that the measured Vds for the 1st and 2nd test has a ratio of less than 1, but for the 3rd and 4th test it has a ratio of greater than 2. Can somebody explain to me why the device is having this kind of response? What I am expecting is that the 3rd and 4th Rdson test will also have a less than 1mohm and a Vds ratio of less than 1, just the same with the 1st and 2nd test. Please advise.
Thanks and Best Regards
1st test: Vgs = 10 and Id = 30
2nd test: Vgs = 10 and Id = 15
3rd test: Vgs = 4.5 and Id = 30
4th test: Vgs = 4.5 and Id = 15
The difference of the Rdson reading for the 1st and 2nd test is less than 1mohm but for the 3rd and 4th test they have greater than 1mohm difference. I also noticed that the measured Vds for the 1st and 2nd test has a ratio of less than 1, but for the 3rd and 4th test it has a ratio of greater than 2. Can somebody explain to me why the device is having this kind of response? What I am expecting is that the 3rd and 4th Rdson test will also have a less than 1mohm and a Vds ratio of less than 1, just the same with the 1st and 2nd test. Please advise.
Thanks and Best Regards