BQ2980 High-side protector for single-cell li-ion and li-polymer batteries | TI.com

BQ2980
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High-side protector for single-cell li-ion and li-polymer batteries

High-side protector for single-cell li-ion and li-polymer batteries - BQ2980
Datasheet
BQ2980xy Voltage, Current, Temperature Protectors with an Integrated High-Side NFET Driver for Fast/Flash Charging Single-Cell Li-Ion and Li-Polymer Batteries datasheet (Rev. E)
 

Description

The BQ2980xy family of devices, featuring integrated charge-pump FET drivers, provides high-side primary battery cell protection for 1-series li-ion and Li-Polymer batteries, enabling consistent Rdson across cell voltages. For better system thermal performance, the BQ2980 device’s accuracy enables the use of a sense resistor as low as 1 mΩ.

The CTR pin in the BQ2980 device can be configured to override the FET driver by host control to create a system reset or shutdown function. Alternatively, the CTR pin can be configured to connect an external Positive Temperature Coefficient (PTC) thermistor for FET OT protection in addition to the internal die temperature sensor.

Features

  • 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:
    • Overtemperature (OT)
  • Additional features:
    • Supports as low as a 1-mΩ sense resistor (RSNS)
    • High-side protection
    • High Vgs FET drive
    • 0-V charging
    • CTR pin for FET override control for system reset/shutdown
    • Configure CTR for second OT protection through an external PTC thermistor
  • Current consumption:
    • NORMAL mode: 4 µA
    • SHUTDOWN mode: 0.1-µA maximum
  • Package:
    • 8-pin X2QFN: 1.50 × 1.50 × 0.37 mm

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Parametrics

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Part number Order Function Number of series cells (Min) Number of series cells (Max) Communication interface Features Typical operating current (Typ) (uA) Rating Vin (Max) (V) Package Group Approx. price (US$)
BQ2980 Order now Protection     1     1     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)    		 5     Catalog     5.5     X2QFN | 8     0.26 | 1ku    
BQ2970 Order now Protection     1     1     No Communication     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)    		 4     Catalog     8     WSON | 6     0.18 | 1ku