Dear forum, Im using a CAT811, that is a microprocessor supervisory circuit that monitors
power supplies. https://www.onsemi.com/pub/Collateral/CAT811-D.PDF
I've been facing some problems with a board startup because a Lion battery (3.8V) which need to power some parts of circuit like SIM8000 (work voltage:3.8V) and uC with 3.3V (in this case i have a 3.3V regulator for uC). I still have a battery charger for Lion battery but Im having some problems with this charge and worry about leakage current. I was reading about startup circuits using schotkky diode, but a definition from wikipedia left worried:
"They can also be used in power supply "OR"ing circuits in products that have both an internal battery and a mains adapter input, or similar. However, the high reverse leakage current presents a problem in this case, as any high-impedance voltage sensing circuit (e.g., monitoring the battery voltage or detecting whether a mains adapter is present) will see the voltage from the other power source through the diode leakage."
So I would like to check with this forum, how to avoid wrong measurement using a schottky diode because its leakage current, as it can interfere on my monitoring battery circuit... Someone has faced it before?
power supplies. https://www.onsemi.com/pub/Collateral/CAT811-D.PDF
I've been facing some problems with a board startup because a Lion battery (3.8V) which need to power some parts of circuit like SIM8000 (work voltage:3.8V) and uC with 3.3V (in this case i have a 3.3V regulator for uC). I still have a battery charger for Lion battery but Im having some problems with this charge and worry about leakage current. I was reading about startup circuits using schotkky diode, but a definition from wikipedia left worried:
"They can also be used in power supply "OR"ing circuits in products that have both an internal battery and a mains adapter input, or similar. However, the high reverse leakage current presents a problem in this case, as any high-impedance voltage sensing circuit (e.g., monitoring the battery voltage or detecting whether a mains adapter is present) will see the voltage from the other power source through the diode leakage."
So I would like to check with this forum, how to avoid wrong measurement using a schottky diode because its leakage current, as it can interfere on my monitoring battery circuit... Someone has faced it before?
