Other Parts Discussed in Thread: INA229-Q1, INA229
i have 2 questions:
1- i was planning to use INA current sensor for 400V output but in Low-Side configuration due to common mode voltage issue. TIDA-00528 uses a more complex method and measures on the high-side. now i am a little bit confused. whats are the benefit of this method (other than offsetting our ground a little bit and short circuit problem in the case of different ground)? why not putting it on Low-Side?
2- i wanna measure currents of maximum 3A. if using Low-Side configuration, would that be a problem to measure very low current? i was thinking of adding a charge pump of -1V to the GND of INA to improve this low current measurement. is that possible? (is it a good idea?)
3- also in capital 4.4 transistor power loss is calculated. Shouldn't that be P=Rds-on*I^2= 46µW? why 400V is used?