SLUSFR7 August 2025 BQ24810
PRODUCTION DATA
An external resistor divider attenuates the adapter voltage before it goes to ACDET. If the battery boost mode is not used, the adapter detect threshold must be programmed to a value greater than the maximum battery voltage, but lower than the minimum allowed adapter voltage. If the battery only boost mode is used, the adapter detect threshold must instead be programmed to a value that is higher than the system regulation voltage programmed in REG0x38[5] and REG0x3E. When ACDET is above 0.6 V, all bias circuits are enabled.
The open drain ACOK output is pulled to external rail under the following conditions:
ACOK HIGH indicates adapter is detected, or adapter present. The REG0x37[11] tracks the status of ACOK pin. ACOK deglitch time is 150 ms at the first time adapter plug-in if REG0x37[12] has not been overwritten since power-on reset. Once the register has been written to, and for all connections after the first connection, the value set by REG0x37[12] (150 ms or 1.3 sec) is used. Since the POR default of this register is 1.3 sec, if it is not overwritten, the first adapter plugin will have an ACOK deglitch time of 150 ms and all subsequent plugins will have an ACOK deglitch time of 1.3 sec.