ZHCSDI5C March 2015 – October 2022 BQ25895
PRODUCTION DATA
The device supports boost converter operation to deliver power from the battery to other portable devices through PMID pin. The boost mode output current rating supports maximum output current up to 3.1 A to charge smartphone and tablet at fast charging rate. The boost operation can be enabled if the conditions are valid:
In boost mode, the device employs a 500 KHz or 1.5 MHz (selectable using BOOST_FREQ bit) step-up switching regulator based on system requirements. To avoid frequency change during boost mode operations, write to boost frequency configuration bit (BOOST_FREQ) is ignored when OTG_CONFIG is set.
During boost mode, the status register VBUS_STAT bits is set to 111, the VBUS output is 5V by default (selectable via BOOSTV register bits). The boost output is maintained when BAT is above VOTG_BAT threshold