Hi,
I would like to use BQ76940 for 12 cell battery with:
- Cell nominal voltage 4.2V, Pack nominal voltage 48V (for 12 cell).
- Cell maximum voltage is 4.7V and Pack maximum voltage is 56.4V.
But in the datasheet, I see that the voltage range for REGSRC pin is -0.3 - 36V. And the datasheet show can use a FET to reducing the voltage.
Can you explain to me:
How the FET can reducing tho voltage?
How can I control this mosfet to make the voltage supply for REGSRC with range -0.3 - 36V ?
How can I calculate the current support for REGSRC and confident the voltage in range -0.3 - 36V ?
Thank you very much for your support!