Other Parts Discussed in Thread: BQ25731, BQ25723, , PMP
Dear all,
We are currently using the BQ25723 battery charger and would like to upgrade it to the newer BQ2573x (either BQ25730 or BQ25731) model to gain compatibility with 5S batteries and increase charge power.
The max output power that the new charging chip can deliver is critical to our application, so I would like to unambiguously understand the candidate chip limitations.
Below is my simple calculation of input and output power values using input/output voltage and current specs from the BQ25730 datasheet:
- Ichg_max=16.256A, up to 5S (Vbat_max=21.75V) --> Pout_max=353W
- Input: up to 26V – 10A --> Pin_max=260W
Assuming the output power cannot be higher than the input power, the input power becomes the limiting factor. This brings me to the following two questions:
- Am I correct in thinking that the maximum power delivered to the battery is limited to 260W in the best case?
- Whether yes or no, what is the highest practical (accounting for recommended safety margins, losses, etc) output power that the BQ2573x charger chips can deliver to the battery?
Thank you very much for your time in advance.
Kind regards,