Hello,
I am searching for a window comparator that can have :
- 1st REF: If main power supply drops less than 21 volts then output goes LOW
- 2nd REF: If main supply reaches higher than 30 volts dc then output goes LOW.
- Equal external hysteresis between both comparators with 100mv hys.
- low continous qiescent current at comparator supply V+ voltage (in micro seconds).
- Fast Response in nano seconds if possible .
If input voltage rangs between 10VDC till 30vdc or higher! , then which comparator i should use ... the 5v comparator or high voltage such as 36vdc comparator ?.
Should i use zener diode as a reference to the comparator and if you suggest to use 5vdc comparator , then the zener diode wont be the best choice for being a stable regulator . If i choose a normal regulator then it will add a very long start up delay and that wont work with my circuit , because i am building an oring circuit driving mosfets as back 2 back to switch between main power supply and auxiliary power supply .
This is the circuit that i have already made but i am not happy with the results .
- Hysteresis are not equal .
- "R_MON1" shows that the supply current of comparators is wasting 16mA all the time which is not good for a battery if it was an auxiliary supply!. Total wasted current 32mA for both comparators.
- D1 and D4 are not accurate due to the changing at the power supply since i have already mentioned that the input voltage might change from 10VDC till 30VDC or higher that is why i chose to use window comparator for validating input voltage .
- I am using 5vdc ultra fast comparator ~4ns (continuous 16mA).
This is the stable zener regulator that i could simulate with 5mV stability :
I am really confused and i hope i can find someone who will guide me or assist me to finish this circuit .
Thank you
I am searching for a window comparator that can have :
- 1st REF: If main power supply drops less than 21 volts then output goes LOW
- 2nd REF: If main supply reaches higher than 30 volts dc then output goes LOW.
- Equal external hysteresis between both comparators with 100mv hys.
- low continous qiescent current at comparator supply V+ voltage (in micro seconds).
- Fast Response in nano seconds if possible .
If input voltage rangs between 10VDC till 30vdc or higher! , then which comparator i should use ... the 5v comparator or high voltage such as 36vdc comparator ?.
Should i use zener diode as a reference to the comparator and if you suggest to use 5vdc comparator , then the zener diode wont be the best choice for being a stable regulator . If i choose a normal regulator then it will add a very long start up delay and that wont work with my circuit , because i am building an oring circuit driving mosfets as back 2 back to switch between main power supply and auxiliary power supply .
This is the circuit that i have already made but i am not happy with the results .
- Hysteresis are not equal .
- "R_MON1" shows that the supply current of comparators is wasting 16mA all the time which is not good for a battery if it was an auxiliary supply!. Total wasted current 32mA for both comparators.
- D1 and D4 are not accurate due to the changing at the power supply since i have already mentioned that the input voltage might change from 10VDC till 30VDC or higher that is why i chose to use window comparator for validating input voltage .
- I am using 5vdc ultra fast comparator ~4ns (continuous 16mA).
This is the stable zener regulator that i could simulate with 5mV stability :
I am really confused and i hope i can find someone who will guide me or assist me to finish this circuit .
Thank you