with2ls
Junior Member level 3
Much like treez in:
I need a comparator that latches when an over current condition is sensed. Here is the basic operation flow:
1. CSA output fed to comparator.
2. When CSA output is greater than specified value, comparator changes state and latches.
3. Output of comparator is used to turn off a series FET, disabling power to the load (CSA output will now drop to 0).
4. Microcontroller periodically checks latch condition and attempts to reset the comparator (which re-enables power to the load).
I've implemented a similar design with the INA301 by TI (a CSA and latching comparator integrated into one package), but I now need something for higher voltage rails.
The following circuit adds the latching and resetting functionality to a common comparator, but at the expense of several extra parts (.asc file also attached).
Is there a simpler way accomplish the comparator+latch+reset functionality?
Or, are there integrated parts under a different name that I am missing?
I need a comparator that latches when an over current condition is sensed. Here is the basic operation flow:
1. CSA output fed to comparator.
2. When CSA output is greater than specified value, comparator changes state and latches.
3. Output of comparator is used to turn off a series FET, disabling power to the load (CSA output will now drop to 0).
4. Microcontroller periodically checks latch condition and attempts to reset the comparator (which re-enables power to the load).
I've implemented a similar design with the INA301 by TI (a CSA and latching comparator integrated into one package), but I now need something for higher voltage rails.
The following circuit adds the latching and resetting functionality to a common comparator, but at the expense of several extra parts (.asc file also attached).
Is there a simpler way accomplish the comparator+latch+reset functionality?
Or, are there integrated parts under a different name that I am missing?