I recently built step up converter which work quite good. Now I would like to build a circuit which would enable this step up converter when battery voltage drops below 1.8V (Arduino BOD).
- I need to keep in mind power consumption because of battery power
Now, I do not know what is the best method to do that.
I guess that couple of transistors would do the job but I do not know where to start. Also I dont know if it is optimal solution bacouse of battery power.
The EN pin is a logic-level input used to enable or disable device switching and lower quiescent current while disabled. A logic high (>70%of VIN) will enable the regulator output. A logic low (<20% of VIN) will ensure that the regulator is disabled.
So if I understand it correctly, I need "circuit" that will "bring" VIN on EN pin when VIN < 1.8 V.
Please give me some direction to start with this. Thank you.
EDIT 2017-03-07 I went search in direction mentioned in comments and found this video. Which I guess is good start.
p.s. Iam using MCP1625 which has enable pin.