Hello:
We have a board with an LTC4040, a 5V input, a Li-ion battery and a load that is made up of a microprocessor and a communications module.
When we disconnect the input, the battery (through the LTC4040) is responsible for keeping the microprocessor and the communications module powered.
In the absence of input voltage, the battery continues discharging and there comes a time when it is not capable of supplying the load (microprocessor and communications module). The battery voltage is measured, and is maintained at a value of approximately 2.6v.
In this state, although the input voltage of 5v is recovered; however, we found that the battery is no longer recharging, and it stays on indefinitely.
Is this behavior normal? how do we get out of this state?
Thank you and regards,
