BQ76940 9 to 15-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family) | TI.com

BQ76940 (ACTIVE)

9 to 15-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)

 

Description

The bq769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The bq769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled/disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.

Features

  • AFE Monitoring Features
    • Pure digital interface
    • Internal ADC measures cell voltage, die
      temperature, and external thermistor
    • A separate, internal ADC measures pack
      current (coulomb counter)
    • Directly supports up to three thermistors (103AT)
  • Hardware Protection Features
    • Overcurrent in discharge (OCD)
    • Short circuit in discharge (SCD)
    • Overvoltage (OV)
    • Undervoltage (UV)
    • Secondary protector fault detection
  • Additional Features
    • Integrated cell balancing FETs
    • Charge, discharge low-side NCH FET drivers
    • Alert interrupt to host microcontroller
    • 2.5-V or 3.3-V output voltage regulator
    • No EEPROM programming necessary
    • High supply voltage abs max (up to 108 V)
    • Simple I2C compatible interface (CRC option)
    • Random cell connection tolerant

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Parametrics Compare all products in Battery monitors & balancers

 
Vin (Max) (V)
Number of series cells (Min)
Number of series cells (Max)
Operating temperature range (C)
Rating
Package Group
Package size: mm2:W x L (PKG)
BQ76940 BQ76920 BQ76925 BQ76930
75     25     26.4     50    
9     3     3     6    
15     5     6     10    
-40 to 85     -40 to 85     -25 to 85     -40 to 85    
Catalog     Catalog     Catalog     Catalog    
TSSOP | 44     TSSOP | 20     TSSOP | 20
VQFN | 24    
TSSOP | 30    
44TSSOP: 71 mm2: 6.4 x 11.15 (TSSOP | 44)     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)