JAJSFD5D March 2015 – October 2022 BQ25890 , BQ25892
PRODUCTION DATA
When the system voltage falls below the battery voltage, the BATFET turns on and the BATFET gate is regulated the gate drive of BATFET so that the minimum BATFET VDS stays at 30 mV when the current is low. This prevents oscillation from entering and exiting the Section 9.2.6.3. As the discharge current increases, the BATFET gate is regulated with a higher voltage to reduce RDS(ON) until the BATFET is in full conduction. At this point onwards, the BATFET VDS linearly increases with discharge current. Figure 9-4 shows the V-I curve of the BATFET gate regulation operation. BATFET turns off to exit Section 9.2.6.3 when the battery is below battery depletion threshold.