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

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
 

Description

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.

Features

  • 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
      LDO
    • Supports a Low-Value (10-mΩ) External Sense
      Resistor
  • 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)
      Estimation
  • 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

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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
Implementation
Gas Gauge Algorithm
Cell Balancing
Features
Operating Temperature Range (C)
Pin/Package
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     I2C    
100     100     100     100     100     100    
None     None     None     None     None     None    
Pack
System    
System     System     Pack     System     Pack
System    
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    

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