I am inquiring about the LTC4012 12.6V, 4A charger schematic found on the datasheet for this component. I had a question about pin 13 (PROG) and the FET that is attached to that. The gate of the transistor is attached to a net that is labeled "Bulk Charge", however, I am a little confused on what that means in this context. I reviewed the data sheet and the section on bulk charge and understand that the LTC begins sourcing the current programmed by the external components connected to CSP, CSN, and PROG.
I am still uncertain on where that gate of the MOSFET connects too. Is it supposed to connect to the battery? or perhaps pin 3 (CHRG). Any suggestions would be greatly appreciated.
Thank you for your time.