SLUSD04B July 2018 – February 2019 BQ25150
With a valid input source connected, the power-path management circuitry monitors the input voltage and current continuously. The current into IN is shared at PMID between charging the battery and powering the system load connected at PMID. If the sum of the charging and load currents exceeds the preset maximum input current set by ILIM, PMID starts to drop. If PMID drops below the DPPM voltage threshold, the charging current is reduced by the DPPM loop through the BATFET. If PMID continues to drop after BATFET charging current is reduced to zero, the part will enter supplement mode when PMID falls below the supplement mode threshold (VBAT - VBSUP1). Battery termination is disabled while in DPPM mode. The VDPPM threshold is typically 200 mV above VBAT . This will enable supporting lower input voltages to minimize losses through the linear charger.