Hi TI engineer,
I am in a puzzle about the schematic in PMP40294 Reference Design Board.
It's protect circuit has NetLable named GG_CHG and GG_DSG, they don't have a corresponding lable in the schematic.
Could you please explain a little about the working principle of the circuit in the picture below?
especially why choose the CELL1 as the Q12's Grid, and how GG_CHG or GG_DSG refluce the charge and discharge process.
Thanks a lot!
Hi, Friend,
If we see the schematic, this block is connected to battery pack. Usually, this block will contain gas gauge IC, back-to-back FET, and battery. Original design is planning to add the circuit of gas gauge IC, back-to-back FET. With some reason the designer removed this part(U7 is not soldered on the board). However, it doesn't affect us to evaluate the whole system. The below reserved schematic will help you understand how these block work. Hope this will help.
If you are interested in the gas gauge part, please check the BQ3060.
