During the charging process, to prevent chip overheating, the BQ2416xx monitors the junction temperature, T_J, of the die and begins to taper down the charge current once T_J reaches the thermal regulation threshold, T_REG. The charge current is reduced to zero when the junction temperature increases about 10°C above T_REG. Once the charge current is reduced, the system current is reduced while the battery supplements the load to supply the system. This may cause a thermal shutdown of the BQ2416xx if the die temperature rises too high. At any state, if T_J exceeds T_SHTDWN, the BQ2416xx suspends charging and disables the buck converter. During thermal shutdown mode, the buck converter is turned off, all timers are suspended, and a single 128-μs pulse is sent on the STAT and INT outputs and the STATx and FAULT_x bits of the status registers are updated in the I²C. A new charging cycle begins when T_J falls below T_SHTDWN by approximately 10°C.