JAJSEC4E September 2012 – January 2018 BQ24157
PRODUCTION DATA.
During the charging process, if the input power source is not able to support the programmed or default charging current, the VBUS voltage will decrease. Once the VBUS drops to VIN_DPM (default 4.52V), the charge current begins to taper down to prevent any further drop of VBUS. When the IC enters this mode, the charge current is lower than the set value and the special charger bit is set (B4 in Register 05H). This feature makes the IC compatible with adapters having different current capabilities.