Tool/software:
Hi All.
i have a question regarding, the TPS259474/TPS259480.
regarding the reverse current protection is see that in both items the reverse voltages : VREVTH can get very low down to 22.3mV/14.8mV in order to activate the reverse blocking system and shutdown the power rail output.
in each typical power system we have ripples which are not necessarily synchronic to each other between the input to the output.
let say that due to a ripple on the outside the Vout will raise above the Vin , with a few mili volts - 30mv, this situation can happen infinitely on a good working system.it can be up to ~50mV above Vin, or more...
but with this low voltage drops down to 22.3mV/14.8mV, that can trigger the item to shutdown and Fault/PG pins to activate low, to the other power units on the power schematics, all the time, causing this power to be switched on and off around the clock , no ? please clarify how this BFET comperator and control are working so the described problem or anything like it, won't trigger the power rail on and off thus creating a well protected Vout rail, but no a steady one ?
it is not clear, how this item can create a steady power rail working continuously, please advise.
thx.
Nitsan.
