Hello, I have a boosting voltage regulator with an "enable" pin on it, and I am using lithium ion batteries which have a voltage between 2.7v to 4.2 volt (3.8 volt nominal). If the "enable" pin is pulled high to the battery level, the voltage regulator starts boosting the voltage and regulating the voltage. If the "enable" pin is pulled low to ground, the voltage regulator shuts down, and has a mosfet that does a complete load disconnect. I have a power switch connected up to this "enable" pin to turn it on and off.
It is recommended to never let the lithium ion batteries discharge below 2.7 volts. Do you know of a circuit that I could also incorporate into this enable pin so that if the voltage is below 2.7v, it will keep the "enable" pin low and prevent it from powering up - regardless if the power switch is turned on or off?
I'm imagining a circuit that outputs low when the voltage is below 2.7v, and outputs high when the voltage is above 2.7v... and then using an AND gate to combine this signal along with the power button signal? Is there a better way of accomplishing this?
Thanks and any help or advice is greatly appreciated!
It is recommended to never let the lithium ion batteries discharge below 2.7 volts. Do you know of a circuit that I could also incorporate into this enable pin so that if the voltage is below 2.7v, it will keep the "enable" pin low and prevent it from powering up - regardless if the power switch is turned on or off?
I'm imagining a circuit that outputs low when the voltage is below 2.7v, and outputs high when the voltage is above 2.7v... and then using an AND gate to combine this signal along with the power button signal? Is there a better way of accomplishing this?
Thanks and any help or advice is greatly appreciated!