ZHCS384H November 2011 – July 2022 BQ24160 , BQ24160A , BQ24161 , BQ24161B , BQ24163 , BQ24168
PRODUCTION DATA
During the charging process, to prevent chip overheating, the BQ2416xx monitors the junction temperature, TJ, of the die and begins to taper down the charge current once TJ reaches the thermal regulation threshold, TREG. The charge current is reduced to zero when the junction temperature increases about 10°C above TREG. 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 TJ exceeds TSHTDWN, 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 TJ falls below TSHTDWN by approximately 10°C.