BQ27Z561 firmware: impedance track battery gas gauge solution for 1-s cell li-ion battery
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BQ27Z561 device firmware: impedance track battery gas gauge solution for 1-s cell li-ion battery packs

ACTIVE V 2.01   20-02-2020  
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The BQ27Z561-R2-DEVICE-FW is a firmware (FW) release that can be flashed onto any existing hardware such as the BQ27Z561 or BQ27Z561-R1 product. The firmware incorporates the patented Impedance Track™ technology to create a pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 1-series cell li-ion and li-polymer battery packs.

Using its integrated high-performance analog peripherals, the BQ27Z561-R2-DEVICE-FW firmware enables the device and measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in li-ion or li-polymer batteries, and reports this information to the system host controller.

SHA-2 authentication, with secure memory for authentication keys, enables identification of genuine battery packs.

  • 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
  • Added hibernate mode to enable < 3uA power mode

Technical documentation
Application notes (1)
Title Type Size (KB) Date
PDF 73 26 Feb 2020
User guides (1)
Title Type Size (KB) Date
PDF 965 07 May 2020

Software development (1)

TI Devices (2)

Part Number Name Product Family
BQ27Z561  Impedance Track™ integrated circuit gas gauge solution for 1-series  Battery management ICs 
BQ27Z561-R1  Impedance Track™ battery gas gauge solution for 1-series cell Li-ion battery packs  Battery management ICs 

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