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BQ25713: 5mohm Rsense between SRP an SRN

Part Number: BQ25713

Hi,

The application we have now for using BQ25713 is as below.

  • Max Charge current: 8796mA
  • Max discharge current: 8000mA

Based on BQ25713 spec I think we need to use a lower Rsense value between SRP and SRN, so the plan is to use a 5mohm resistor here.

So, our questions are,

  • From HW design, what else would be changed to fir 5mohm Rsense?
  • From SW register, which register should be configured or decoded in a different way to match 5mohm design?

THanks!

Antony

  • BQ25713 only supports 10mohm and 20mohm according to the datasheet, however, you may trick the controller with 5mohm RSR. That means you set all the charging and discharging threshold by 1/2. The battery charge controller reads the voltage across RSR to determine the current level.