BQ25713B: How to write the battery charging and discharging curve into BQ25713?

Hi Mike,

The native charging curve for BQ25713B follows the standard profile for charging Li-Ion and similar chemistries, which is a constant-current main charging phase followed by a constant voltage phase leading to charge termination.  The current for the constant-current phase is programmed in the ChargeCurrent register (0x03/0x02) and the voltage for the constant voltage phase is programmed in the MaxChargeVoltage register (0x05/0x04). 

Assuming this is the charging profile desired, those two registers simply need to be set and BQ25713 will do the rest.  If a different charging profile is required, for instance because NiMH is being charged and needs a different termination scheme, then an external uC would also control the current and voltage via the ChargeCurrent and MaxChargeVoltage registers but instead of writing a single value and letting the native charge profile take control, the uC would need to make multiple writes in order to fine-tune the termination control. 

Battery discharge does not really follow a curve, but rather the battery will discharge according to the current draw of the system.  BQ25713 will automatically transition between charging and discharging as necessary to support the system current draw without exceeding the adapter input current set in IIN_DPM register (0x25/0x24). 

Regards,

Steve