High Side Protector for Single-Cell Li-Ion and Li-Polymer Batteries



The bq2980 device provides a primary battery cell protection for 1 s battery pack by open CHG or DSG FETs at fault conditions. The device family provides a wide range of overvoltage and undervoltage threshold range, covering various li-ion chemistries. The bq2980 device monitors across an external sense resistor for current protection. The device family has an internal temperature sensor to provide overtemperature protection.

The CTR pin in bq2980 can be configured to override the FET driver by host control, suitable to create a system reset or shutdown function. Alternatively, the CTR pin can be configured to connect an external PTC for FET overtemperature protection in addition to the internal die temperature sensor.


  • Voltage Protection
    • Overvoltage (OV): ±10 mV
    • Undervoltage (UV): ±20 mV
  • Current Protection
    • Overcurrent in Charge (OCC): ±1 mV
    • Overcurrent in Discharge (OCD): ±1 mV
    • Short Circuit in Discharge (SCD): ±5 mV
  • Temperature Protection
    • Over-Temperature (OT)
  • Additional Features
    • Support as Low as 1 mΩ Rsense
    • CTR pin for FET Override Control For System Reset/Shutdown, or
    • Configure CTR For Second OT Protection Through external PTC Thermistor
  • Current Consumption
    • Normal Mode: 4 µA
    • Shutdown Mode: 0.1 µA Maximum
  • Package
    • 8-pin X2QFN: 1.5 × 1.5 × 0.37 mm

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Parametrics Compare all products in Battery Monitor, Protection & Authentication Solutions

Number of Series Cells (Min)
Number of Series Cells (Max)
Communication Interface
Typical Operating Current (Typ) (uA)
Vin (Max) (V)
BQ2980 BQ2970
Protection    Protection   
No Communication    No Communication   
Analog current sense
High-Side NCH CHG/DSG FET Drive
Programmable EEPROM or EPROM
Temperature sense
Over-current in Charge (OCC)
Over-current in Discharge (OCD)   
Low-Side NCH CHG/DSG FET Drive
Programmable EEPROM or EPROM
Over-current in Charge (OCC)
Over-current in Discharge (OCD)
Over-voltage (OV)
Short-circuit Discharge (SCD)
Under-voltage (UV)   
5    4   
Catalog    Catalog   
5.5    8