Part Number: SM73201-ARC-EV
Hi,
I am working with a TI RD-195 DC arc detection evaluation board and I was able to detect arc with the board. However, after few days of working, the board failed to power up showing an over current in the 6V power supply.
After debugging the board I found the over current is in the 3.3V rail. (the 5V rail works fine when I removed the 3.3V LDO and I am able to operate the three SM73307 in the analog filter section) The resistance is measuered as 9ohm accross 3.3V rail and the GND.
I went on disconnecting the components connected to the 3.3V rail, and now i have removed everything except VDDIO, VDD of DSP in 3.3V rail. Still i have the low resistance between 3.3V and the GND.
I have two of these boards and both have this problem.
Did any one of you faced a similar problem?
Regards,
Devinda