I am designing a GSM modem power supply circuit.
- The circuit requires a 2A power supply.
- The module SIM800C itself can be powered directly by Li-Ion or Li-Poly battery power.
I am looking at a ready-made charging and output voltage protection PCB like this.
These are commonly found at many places and hence the motivation to use these boards off-the-shelf.
The circuit that I am designing should work reliably (for at least the next 5 years).
I have the following questions:
- Can I give 5V supply at the input at this circuit and connect battery at the battery terminals. Can I draw supply from the output terminals of the circuit infinitely?
- The power adapter at the input will be connected forever and this is in turn connected to UPS. The battery is only for the unforeseen event when UPS also goes down. Will the circuit above work OK for an extended period application?