BQ27220 (ACTIVE)

Single cell Pack/System-side CEDV Battery Fuel (Gas) Gauge w/Pre-programmed Chemistry Profiles

Single cell Pack/System-side CEDV Battery Fuel (Gas) Gauge w/Pre-programmed Chemistry Profiles - BQ27220


The Texas Instruments bq27220 battery fuel gauge is a single-cell gauge that requires minimal user-configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27220 device uses the Compensated End-of-Discharge Voltage (CEDV) 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 (%).

The bq27220 battery fuel gauge has ultra-low power consumption in NORMAL (50 µA) and SLEEP (9 µA) modes, leading to longer battery runtime. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.

Customers can use preloaded CEDV parameters in ROM or can generate custom chemistry parameters using TI’s web-based tool, GAUGEPARCAL. Custom-generated parameters can be either programmed in the device RAM by the host on power up of the system or customers can program the parameters to an onboard One-Time Programmable (OTP) memory.

Battery fuel gauging with the bq27220 device requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 9-ball, 1.62 mm × 1.58 mm, 0.5-mm pitch NanoFree chip scale package (DSBGA) is ideal for space-constrained applications.


  • Single-Cell Li-Ion Battery Fuel Gauge
    • Resides in Pack or on System Board
    • Supports Embedded or Removable Batteries
    • Powers Directly from Battery with Integrated
    • Supports a Low-Value (10-mΩ) External Sense
  • Ultra-Low Power Consumption in NORMAL
    (50 µA) and SLEEP (9 µA) Modes
  • Battery Fuel Gauging Based on Compensated
    End-of-Discharge Voltage (CEDV) Technology
    • Reports Remaining Capacity and State-of-
      Charge (SOC) with Smoothing Filter
    • Adjusts Automatically for Battery Aging, Self-
      Discharge, Temperature, and Rate Changes
    • Provides Battery State-of-Health (Aging)
  • Microcontroller Peripheral Supports:
    • 400-kHz I2C™ Serial Interface
    • Configurable SOC Interrupt OR
      Battery Low Digital Output Warning
    • Internal Temperature Sensor OR
      Host-Reported Temperature OR
      External Thermistor

View more

Parametrics Compare all products in Battery Fuel Gauge

Number of Series Cells
Cell Chemistry
Battery Capacity (Max) (mAh)
Communication Interface
Battery Capacity (Min) (mAh)
External Capacity Indication
Gas Gauge Algorithm
Cell Balancing
Operating Temperature Range (C)
BQ27220 BQ27426 BQ27520-G4 BQ27542-G1 BQ27621-G1 BQ35100
Single Cell    Single Cell    Single Cell    Single Cell    Single Cell    2-4 Cells
>4 Cells
Single Cell   
Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Primary Lithium   
29000    14000    32000    32000    32000    32000   
I2C    I2C    I2C    HDQ
I2C    I2C   
100    100    100    100    100    100   
None    None    None    None    None    None   
System    System    Pack    System    Pack
CEDV    Impedance Track    Impedance Track    Impedance Track    Dynamic Voltage Correlation    Primary   
N/A    N/A    N/A    N/A    N/A    N/A   
N/A    N/A    N/A    SHA-1 Authentication    No Sense Resistor Required    End of Service   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
9DSBGA    9DSBGA    15DSBGA    12SON    9DSBGA    14TSSOP   

Featured tools and software