DESCRIPTION
●The bq77PL900 is a five to ten series cell lithium-ion battery pack protector. The integrated I2C
●communications interface allows the bq77PL900 also to be as an analog front end (AFE) for a Host controller. Two LDOs, one 5-V, 25-mA and one 3.3-V, 25-mA, are also included and may be used to power a host controller or support circuitry.
●FEATURES
●• 5, 6, 7, 8, 9, or 10 Series-Cell Primary Protection
●• PMOS FET Drive for Charge and Discharge FETs
●• Capable of Operation with 1-mΩ Sense Resistor
●• Supply Voltage Range from 7 V to 50 V
●• Low Supply Current of 450 µA Typical
●• Integrated 5-V, 25-mA LDO
●• Integrated 3.3-V, 25-mA LDO
●• Stand-Alone Mode
●– Pack Protection Control and Recovery
●– Individual Cell Monitoring
●– Integrated Cell Balancing
●– Programmable Threshold and Delay Time for
● – Overvoltage
● – Undervoltage
● – Overcurrent in Discharge
● – Short Circuit in Discharge
●– Fixed Overtemperature Protection
●• Host Control Mode
●– I2C Interface to Host Controller
●– Analog Interface for Host Cell Measurement and System Charge/Discharge Current
●– Host-Controlled Protection Recovery
●– Host-Controlled Cell Balancing
