SLUSAH0F October 2011 – November 2019 BQ25504
The BQ25504 has three functional modes: cold-start operation, main boost charger enabled and thermal shutdown. The cold start circuitry is powered from VIN_DC. The main boost charger circuitry is powered from VSTOR while the boost power stage is powered from VIN_DC. Details of entering and exiting each mode are explained below.