I want to use a current sensor IC (like the AC712), but a Chinese one CC6903-10A because it works with 3.3V. There is a circuit in the ACS712 datasheet (page 12) which also appears in the CC6903 datasheet (page 5, middle/bottom right) that is meant to latch when a high current occurs.
Now, Vout equation is Vcc/2+0.132*I.
So 0A is 1.65V, -10A is 0.33V and +10A is 2.97V.
I'd like to trip/latch when the current is -2A or +2A. I mean, I assume that's how it will look when monitoring an AC load right?
Once tripped, it should latch until power is removed from Vdd.
My LTSpice does not seem to indicate this is what would happen...? It seems to reset itself?
Anyone able to help me with a simple latch?
1.65V is good.
Anything above 1.914V is bad.
Anything below 1.386V is bad.
Now, Vout equation is Vcc/2+0.132*I.
So 0A is 1.65V, -10A is 0.33V and +10A is 2.97V.
I'd like to trip/latch when the current is -2A or +2A. I mean, I assume that's how it will look when monitoring an AC load right?
Once tripped, it should latch until power is removed from Vdd.
My LTSpice does not seem to indicate this is what would happen...? It seems to reset itself?
Anyone able to help me with a simple latch?
1.65V is good.
Anything above 1.914V is bad.
Anything below 1.386V is bad.