Other Parts Discussed in Thread: TPD4S012, INA210, INA181
I am using the INA199x2 in a phone charging application. I don't have any external components except for a .045 ohm current sensing resistor. The part has a V+ of 5V and I am using a high side arrangement where the phone is the load. The reference is tied to ground. The output goes to an ADC. That's basically it. What I am seeing is that occasionally the output stays at 2V-3V which basically indicates that the chip has been destroyed. I have surge protectors on the inputs to prevent ESD problems. The voltages presented to the Vin+ and Vin- are approximately 5.1V - 5.3V. The maximum current that goes through the sense resistor is 1.5A but typically less than 1A. I don't think I am violating any of the specifications so I am confused as to why the chip is being destroyed. I realize that at 1.5A, the output would be maxed out (greater than V+) but I don't think that should be a problem. Any one have any thoughts on this?
Thanks,
CT