BQ25750: FBG pin not shown in typical application circuit

Phil Rittenhouse

Part Number: BQ25750

Tool/software:

Hi,

One more BQ25750 question. From the datasheet for the BQ25750, there is an FBG pin which should be connected to the bottom of battery feedback resistor. The typical application circuit in Figure 9-1 has the bottom of the battery feedback resistor ladder connected to ground and the FBG pin is missing. Is this a mistake? It looks like the circuit will still work but with a higher battery drain.

Best regards,
Phi

5 months ago

+1 Ethan Galloway 5 months ago

TI__Mastermind 30915 points

Hello Phil,

Thanks for looking into this. Figure 9-1 is just an example diagram. The battery feedback resistors should be connected to FBG, but the circuit will also work with the feedback resistors connected to GND also.

You should refer to the schematic and layout checklist for the BQ25750 for the pin connections: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1322803/faq-bq25750-schematic-and-layout-checklist

Also, we have a general FAQ for the BQ25750 that might help as well: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1357460/faq-bq2575x-faq-page

Let me know if you have any questions about this.

Best Regards,
Ethan Galloway

Power management

Power management forum

BQ25750: FBG pin not shown in typical application circuit