BQ27Z561-R1 Impedance Track™ battery gas gauge solution for 1-series cell li-ion battery packs | TI.com

BQ27Z561-R1 (ACTIVE) Impedance Track™ battery gas gauge solution for 1-series cell li-ion battery packs

 

Description

The Texas Instruments BQ27Z561-R1 Impedance Track™ gas gauge solution is a highly integrated, accurate 1-series cell gas gauge with a flash programmable custom reduced instruction-set CPU (RISC) and SHA-256 authentication for Li-Ion and Li-Polymer battery packs. The 1-series cell capability includes parallel cells for increased capacity.

The BQ27Z561-R1 gas gauge communicates via I2C-compatible and HDQ one-wire interfaces and includes several key features that can help facilitate accurate gas gauging applications. Integrated temperature sense functions (internal and external options) enable system and battery temperature measurements.

The integrated SHA-256 functionality helps enable secure identification between systems and packs. The interrupt and BTP functions facilitate the BQ27Z561-R1 device to inform the system when a specific state-of-charge (SOC), voltage, or temperature condition occurs. The low-voltage operation enables the system to continue monitoring the battery even in deeply discharged conditions. During low-activity situations, the device can be set to the low power coulomb counting (CC) mode, which enables the device to continue its coulomb counting while reducing operating current significantly.

Features

  • Supports current sense resistors down to 1 mΩ
  • Supports pack-side gauging including enhanced state of health (SOH) algorithm
  • Fast QMAX update option based on predicted OCV
  • SHA-256 authentication responder for increased battery pack security
  • Sophisticated charge algorithms:
    • JEITA
    • Enhanced charging
    • RSOC charging compensation option
  • Two independent ADCs
    • Support for simultaneous current and voltage sampling
    • High-accuracy coulomb counter with input offset error < 1 µV (typical)
  • Low-voltage (2-V) operation
  • Wide-range current applications (1 mA to > 5 A)
  • Active high or low pulse or level interrupt pin
  • Supports battery trip point (BTP)
  • Reduced power modes (typical battery pack operating range conditions)
    • Typical SLEEP mode: < 11 µA
    • Typical DEEP SLEEP mode: < 9 µA
    • Typical OFF mode: < 1.9 µA
  • Internal and external temperature sense functions
  • Diagnostic lifetime data monitor and black box recorder
  • 400-kHz I2C bus communications interface for high-speed programming and data access
  • HDQ one-wire for communication with host
  • Compact 12-pin DSBGA package (YPH)

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Parametrics

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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)
BQ27Z561-R1 Order now Single Cell     Li-Ion/Li-Polymer     30000     HDQ
I2C    
100     None     Pack     Impedance Track         SHA-256 Authentication     -40 to 85     DSBGA | 12     12DSBGA: 3 mm2: 1.4 x 2.064 (DSBGA | 12)    
BQ27546-G1 Order now Single Cell     Li-Ion/Li-Polymer     32000     HDQ
I2C    
100     None     Pack     Impedance Track         SHA-1 Authentication     -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27750 Order now Single Cell     Li-Ion/Li-Polymer
LiFePO4    
14000     I2C     100     None     Pack     Impedance Track         Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication    
-40 to 85     SON | 12     12SON: 10 mm2: 2.5 x 4 (SON | 12)    
BQ27Z561 Order now Single Cell     Li-Ion/Li-Polymer     30000     HDQ
I2C    
100     None     Pack     Impedance Track         SHA-256 Authentication     -40 to 85     DSBGA | 12     12DSBGA: 3 mm2: 1.4 x 2.064 (DSBGA | 12)