The charge terminal has an internal open drain FET which is on (pulls down to V_SS) during the first charge only (independent of TTDM) and is turned off once the battery reaches voltage regulation and the charge current tapers to the termination threshold set by the PRE-TERM resistor. The BQ24041 does not terminate charge, however, the CHG terminal will turn off once the battery current reaches 10% of the programmed charge current.

The charge terminal is high impedance in sleep mode and OVP (if PG is high impedance) and return to its previous state once the condition is removed.

Cycling input power, pulling the TS terminal low and releasing or entering pre-charge mode causes the CHG terminal to go reset (go low if power is good and a discharged battery is attached) and is considered the start of a first charge.