Other Parts Discussed in Thread: BQ25703
Hi...
One of my customer has used BQ25703 in their product design. Device is working perfectly fine in normal operation & no issue observed.
BQ25703 input supply is coming from the vehicle battery (Adapter in) & secondary battery is charging using primary battery as schematic given in datasheet. in absence of primary battery (adapter supply), secondary battery is supplying the current to system.
They observed that BQ25703 is consuming the current about 5 to 6mA, as this current is draining the vehicle battery they want to bring down this current & hence want to implement the low power mode.
There are few queries related implementation of low power which I have listed down & need help on this.
1). If BQ25703 is put under low power mode, will it charge the battery?
2). Under LPM, will secondary battery supplies to system load? considering both the scenario, 1). adapter supply is present & 2). adapter supply is not present or under voltage?
3). once kept under LPM mode, how to bring back the device into normal mode if adapter supply is introduce again? consider communication controller is powered off (device which gives command to BQ25703)?
4). What are the registers need to program?
5). Is there any sequence to follow to write the registers?
6). In low power mode what functionalities will remain active & what functionalities will go off?
7). how much current can be saved considering the LPM operation allowing the system requirement as stated above?
Need quick help to resolve the queries as customer want to release the product quickly.
Mitesh
