Tool/software:
Hello
This is a question about applying BQ25798.
I want to apply the power block of our system as shown in the figure below.
Input power: 12~24V Adapter
Output power:
System load1: 24V, 40mA (PMID)
System load2: 3.3V 300mA (SYS)
In backup mode without input power, power should be supplied to system load1 and 2 at the same time.
Detailed questions
1)Can I charge a 14.8V (4S cell) battery using a 12~24V charging adapter?
2)Can I supply 24V to system load1 (PMID pin) and 3.3V to system load2 (SYS pin) at the same time in backup mode without charging power?
2-1) Can I detect a short when supplying 24V power to system load1 (PMID pin) in backup mode?
2-2) Can I detect a short circuit when the PMID pin is shorted? How can the BQ25798 detect a short circuit and inform me as SW or HW?
3) In backup mode, should I apply an additional BUCK IC to supply 3.3V power to system load2 (SYS pin)?
If I need to add a BUCK IC, please tell me why.
Thank you, your support.