BQ27200 (ACTIVE)

Single-Cell Li-Ion and Li-Pol Battery Gas Gauge IC with I2C Interface

Description

The bqJUNIOR™ series are highly accurate stand-alone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting devices targeted at space-limited, portable applications. The IC monitors a voltage drop across a small current sense resistor connected in series with the battery to determine charge and discharge activity of the battery. Compensations for battery temperature, self-discharge, and discharge rate are applied to the capacity measurments to provide available time-to-empty information across a wide range of operating conditions. Battery capacity is automatically recalibrated, or learned, in the course of a discharge cycle from full to empty. Internal registers include current, capacity, time-to-empty, state-of-charge, cell temperature and voltage, status, and more.

The bqJUNIOR can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a HDQ one-wire or I2C serial interface.

Features

  • HDQ (bq27000) or I2C (bq27200) Communication
  • Reports Accurate Time-to-Empty With Measured Load and Historical Maximum and Standby Loads
  • Reports Temperature, Voltage, and Current
  • High Accuracy Charge and Discharge Current Integration with Automatic Offset Calibration
  • Requires No User Calibration
  • Programmable Input/Output Port
  • Internal User EEPROM Configuration Memory
  • Automatic Capacity Reduction With Age
  • Stable Oscillator Without External Components
  • Dynamic End-of-Discharge Detection Delay to Allow Use in a High-Dynamic Load Environment
  • Automatic Sleep Mode When Communication Lines are Low
  • Available in a Small 3 mm x 4 mm QFN Package
  • Five Low-Power Operating Modes
    • Active: < 90 µA
    • Sleep: < 2.5 µA
    • Ship: < 2 µA (bq27000 only)
    • Hibernate: < 1.5 µA
    • Data Retention: < 20 nA
  • APPLICATIONS
    • PDA
    • Smart Phones
    • MP3 Players
    • Digital Cameras
    • Internet Appliances
    • Handheld Devices

bqJUNIOR is a trademark of Texas Instruments.

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Parametrics Compare all products in Battery Fuel Gauge

 
# Series Cells
Cell Chemistry
Battery Capacity (Max) (mAh)
Communication Interface
Battery Capacity (Min) (mAh)
External Capacity Indication
Implementation
Gas Gauge Algorithm
Special Features
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ27200 BQ26500 BQ27000 BQ27010 BQ27210 BQ27510-G2 BQ27541-G1
Single Cell     Single Cell     Single Cell     Single Cell     Single Cell     Single Cell     Single Cell    
Li-Ion
Li-Polymer    
Lead Acid
Li-Ion
Li-Polymer
NiCd
NiMH    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
6000     6000     6000     6000     6000     8000     14500    
I2C     HDQ     HDQ     HDQ     I2C     I2C     HDQ
I2C    
6000     300     300     300     300     300     300    
None     None     None     None     None     None     None    
Pack     Pack
System    
Pack     Pack     Pack     System     Pack    
EDV     EDV     EDV     CEDV     CEDV     Impedance Track     Impedance Track    
            SHA-1 Authentication    
-20 to 70     0 to 70     -20 to 70     -20 to 70     -20 to 70     -40 to 85     -40 to 85    
10VSON     8TSSOP     10VSON     10VSON     10VSON     12SON     12SON    
1.49 | 1ku     2.47 | 1ku     1.49 | 1ku     1.60 | 1ku     1.60 | 1ku     1.40 | 1ku     1.25 | 1ku    

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