EDIT: For clarification currently my design is using a LM317 in a constant current mode for charging the backup cells and a fixed voltage regulator for power the rest of the circuit. I am asking about getting rid of the fixed voltage regulator.
Given that a design has a constant current source for charging its backup NiMh at C/10. At this rate you can charge continuously.
The voltage generated by the LM317 across the battery terminals tracks the battery voltage.
Can we power the device from the battery terminals all the time?
My device functions with a power source between 2.5V and 3.6V. The 3 cell AAA battery likes to be charged to 4.1V. So I am thinking of finding a diode with a .5V Vf and forgetting about using a fixed voltage regulator.
I will need to increase the current output of the LM317 by the amount used by the circuit backed up.
Given that a design has a constant current source for charging its backup NiMh at C/10. At this rate you can charge continuously.
The voltage generated by the LM317 across the battery terminals tracks the battery voltage.
Can we power the device from the battery terminals all the time?
My device functions with a power source between 2.5V and 3.6V. The 3 cell AAA battery likes to be charged to 4.1V. So I am thinking of finding a diode with a .5V Vf and forgetting about using a fixed voltage regulator.
I will need to increase the current output of the LM317 by the amount used by the circuit backed up.
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