The BQ77PL900DL is a five to ten series cell Lithium-ion Battery Pack Protector. The integrated I2C communications interface allows the protector also to be as an analogue front end (AFE) for a Host controller. The BQ77PL900 integrates a voltage translation system to extract battery parameters such as individual cell voltages and charge/discharge current. Variables such as voltage protection thresholds and detection delay times can be programmed by using the internal EEPROM. The battery pack protector can act as a stand-alone self-contained battery protection system (stand-alone mode). It can alternatively be combined with a host microcontroller to offer fuel gauge or other battery management capabilities to the host system (host-control mode). The protector provides full safety protection for overvoltage, under-voltage, over-current in discharge and short-circuit in discharge conditions. No external components are needed to configure the protection features.
PMOS FET Drive for charge and discharge FETs
Pack protection control and recovery
Individual cell monitoring
Integrated cell balancing
Fixed over-temperature protection
I2C interface to host controller
Analogue interface for host cell measurement and system charge/discharge current
(EN)
