Other Parts Discussed in Thread: TPS63900
Tool/software:
Hi,
We have a battery powered sensor device that is powered by two AA primary LiSOCl2 (3.6V) cells in parallel configuration. We use a TPS63900 as the main power supply IC and, as it's possible for the end user to misplace the batteries, Schottky protection diodes are placed is in series with each cell. We'd like to improve the efficiency of this design by employing two ideal diodes instead.
What I understand from the datasheets of the various ideal diodes (ORing solutions) you offer is that these are typically used in a primary/backup power scenario. In that case, the input voltages tend to be different for the different inputs available (e.g. a 3.6V battery backup and a 5V mains supply). What I also understand is that these ideal diode/ORing solutions are not really meant for ORing inputs with voltages that are very close and could even "lock-up" disconnecting the power altogether. As the cell voltages of the batteries converge to each other, the cell voltage can be expected to be virtually the same across the two cells.
Is there a solution available for my use case: paralleling two primary cells with maximum efficiency (3.6V, < 500mA) while providing polarity reversal protection?
