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BQ27Z558

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Single-cell Impedance Track™ technology gas gauge and protection solution

Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 32000 Implementation Pack External capacity indication None Features Impedance Track™ algorithm, SHA-256 Authentication Operating temperature range (°C) -40 to 85 Rating Catalog
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 32000 Implementation Pack External capacity indication None Features Impedance Track™ algorithm, SHA-256 Authentication Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YPH) 12 2.8896 mm² 2.064 x 1.4
  • Supports high-side and low-side 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 HIBERNATE mode: < 3 µA
    • Typical OFF mode: < 1.9 µA
  • Internal and external temperature sense functions
  • Diagnostic lifetime data monitor and black box recorder
  • 400-kHz I 2C bus communications interface, including a 1.2-V logic level for high-speed programming and data access
  • HDQ one-wire for communication with host
  • Compact 12-pin DSBGA package (YPH)
  • Supports high-side and low-side 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 HIBERNATE mode: < 3 µA
    • Typical OFF mode: < 1.9 µA
  • Internal and external temperature sense functions
  • Diagnostic lifetime data monitor and black box recorder
  • 400-kHz I 2C bus communications interface, including a 1.2-V logic level for high-speed programming and data access
  • HDQ one-wire for communication with host
  • Compact 12-pin DSBGA package (YPH)

The Texas Instruments BQ27Z558 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 BQ27Z558 gas gauge communicates through I 2C-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 Texas Instruments BQ27Z558 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 BQ27Z558 gas gauge communicates through I 2C-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.

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Technical documentation

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Type Title Date
* Data sheet BQ27Z558 Impedance Track™ Battery Gas Gauge Solutionfor 1-Series Cell Li-Ion Battery Packs, with 1.2-V IO Support datasheet PDF | HTML 10 Nov 2023
EVM User's guide BQ27Z558EVM-084 Single-Cell Impedance Track™ Technology PDF | HTML 08 Nov 2023

Design & development

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Evaluation board

BQ27Z558EVM-084 — BQ27Z558 evaluation module for single-cell Impedance Track™ technology gas gauge

The BQ27Z558 evaluation module (EVM) is a development platform for the BQ27Z558 battery gauge. The circuit module includes the BQ27Z558 integrated circuit (IC) and all other components necessary to monitor and predict capacity for 1-series cell lithium-ion (Li-ion) or lithium-polymer (li-polymer) (...)

User guide: PDF | HTML
Not available on TI.com
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DSBGA (YPH) 12 View options

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