SLUS940D September 2009 – May 2021 BQ24050 , BQ24052
PRODUCTION DATA
The battery detect routine should check for a missing battery while keeping the OUT pin at a useable voltage. Whenever the battery is missing the CHG pin should be high impedance.
The battery detect routine is run when entering and exiting TTDM to verify if battery is present, or run all the time if battery is missing and not in TTDM. On power up, if battery voltage is greater than VRCH threshold, a battery detect routine is run to determine if a battery is present.
The battery detect routine will be disabled while the IC is in TTDM or has a TS fault. See Figure 7-6 for the Battery Detect Flow diagram.