BQ77PL900DLG4

五到十节锂离子电池或Lifthium聚合物电池保护电路和模拟前端 Five to Ten Series Cell Lithium-Ion or Lifthium-Polymer Battery Protector and Analog Front End

DESCRIPON

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