BQ27320 Single Cell Pack/System-side CEDV Battery Fuel (Gas) Gauge |

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Single Cell Pack/System-side CEDV Battery Fuel (Gas) Gauge

Single Cell Pack/System-side CEDV Battery Fuel (Gas) Gauge - BQ27320


The Texas Instruments single-cell bq27320 battery fuel gauge requires very minimal configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27320 uses the Compensated End-of-Discharge Voltage (CEDV) gas gauging algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C) and state-of-health (%).

TI customers can tune chemistry parameters using TI’s web-based tool, GAUGEPARCAL.

Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.

Battery fuel gauging with the bq27320 requires only PACK+ (P+), PACK– (P–), and optional thermistor (T) connections to a removable battery pack or embedded battery circuit. The device uses a 15-ball NanoFree™ (DSBGA) package. It is ideal for space-constrained applications.


  • Battery Fuel Gauge For System-/Pack-Side
  • Compensated End-of-Discharge Voltage (CEDV)
    Gauging Technology
    • Adjusts for Battery Aging, Self-Discharge,
      Temperature, and Rate Changes
    • Reports Remaining Capacity, State-of-Charge
      (SOC), and Time-to-Empty with Smoothing
    • Battery State-of-Health Estimation
    • Supports Embedded or Removable Packs
      from 100-mAhr to 14,500-mAhr Capacity
    • Accommodates Pack Swapping with up to
      Four Separate Battery Profiles
    • Supports a Raw Coulomb Counter To Provide
      Delta Capacity Information
  • Microcontroller Peripheral Supports:
    • SDQ Communication Interface for
      Authentication ID
    • 400-kHz I2C™ Serial Interface for High-Speed
    • 32 Bytes of Scratch-Pad FLASH NVM
    • Battery Low Digital Output Warning
    • Configurable SOC Interrupts
    • External Thermistor, Internal Sensor, or Host
      Reported Temperature Options
  • 15-Pin 1.375 mm × 2.75 mm × 1.75 mm
    Pitch NanoFree™ (DSBGA) Package


Compare all products in Battery fuel gauges Email Download to Excel
Part number Order Number of series cells Cell chemistry Battery capacity (Max) (mAh) Communication interface Battery capacity (Min) (mAh) External capacity indication Implementation Gas gauge algorithm Cell balancing Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ27320 Order now Single Cell     Li-Ion/Li-Polymer     29000     I2C     100     None     Pack
CEDV             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27520-G4 Order now Single Cell     Li-Ion/Li-Polymer     32000     I2C     100     None     System     Impedance Track             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27546-G1 Order now Single Cell     Li-Ion/Li-Polymer     32000     HDQ
100     None     Pack     Impedance Track         SHA-1 Authentication     -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)