BQ78350 is not recommended for new designs
Although this product continues to be in production to support previous designs, we don't recommend it for new designs. Consider one of these alternates:
open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
BQ78350-R1A ACTIVE CEDV li-ion gas gauge and battery management controller Functionally identical to BQ7830. Pre-loaded with latest R1 firmware (v1.04). Improves the robustness of the Shutdown routine (fif using the Shutdown command in their application)

Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells >4 Cells Communication interface I2C, SMBus Battery capacity (max) (mAh) 320000 Implementation Pack External capacity indication LCD, LED, SOC Features CEDV Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells >4 Cells Communication interface I2C, SMBus Battery capacity (max) (mAh) 320000 Implementation Pack External capacity indication LCD, LED, SOC Features CEDV Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
TSSOP (DBT) 30 49.92 mm² 7.8 x 6.4
  • Compensated End-of-Discharge Voltage (CEDV) Gauging Algorithm
  • Supports SMBus Host Communication
  • Flexible Configuration for 3- to 5-Series (bq76920), 6- to 10-Series (bq76930),
    and 9- to 15-Series (bq76940) Li-Ion and LiFePO4 Batteries
  • Supports Battery Configurations up to 320 Ahr
  • Supports Charge and Discharge Current Reporting up to 320 A
  • External NTC Thermistor Support from Companion AFE
  • Full Array of Programmable Protection Features
    • Voltage
    • Current
    • Temperature
    • System Components
  • Lifetime Data Logging
  • Supports CC-CV Charging, Including Precharge, Charge Inhibit, and
    Charge Suspend
  • Offers an Optional Resistor Programmable SMBus Slave Address for
    up to Eight Different Bus Addresses
  • Drives up to a 5-Segment LED or LCD Display for State-Of-Charge
    Indication
  • Provides SHA-1 Authentication
  • Compensated End-of-Discharge Voltage (CEDV) Gauging Algorithm
  • Supports SMBus Host Communication
  • Flexible Configuration for 3- to 5-Series (bq76920), 6- to 10-Series (bq76930),
    and 9- to 15-Series (bq76940) Li-Ion and LiFePO4 Batteries
  • Supports Battery Configurations up to 320 Ahr
  • Supports Charge and Discharge Current Reporting up to 320 A
  • External NTC Thermistor Support from Companion AFE
  • Full Array of Programmable Protection Features
    • Voltage
    • Current
    • Temperature
    • System Components
  • Lifetime Data Logging
  • Supports CC-CV Charging, Including Precharge, Charge Inhibit, and
    Charge Suspend
  • Offers an Optional Resistor Programmable SMBus Slave Address for
    up to Eight Different Bus Addresses
  • Drives up to a 5-Segment LED or LCD Display for State-Of-Charge
    Indication
  • Provides SHA-1 Authentication

The Texas Instruments bq78350 Li-Ion and LiFePO4 Battery Management Controller and companion to the bq769x0 family of Analog Front End (AFE) protection devices provides a comprehensive set of Battery Management System (BMS) subsystems, helping to accelerate product development for faster time-to-market.

The bq78350 controller and the bq769x0 AFE support from 3-series to 15-series cell applications. The bq78350 provides an accurate fuel gauge and state-of-health (SoH) monitor, as well as cell balancing and a full range of voltage-, current-, and temperature-based protection features.

The bq78350 offers optional LED or LCD display configurations for the capacity reporting. It also makes data available over its SMBus 1.1 interface. Battery history and diagnostic data is also kept within the device in non-volatile memory and is available over the same interface.

The Texas Instruments bq78350 Li-Ion and LiFePO4 Battery Management Controller and companion to the bq769x0 family of Analog Front End (AFE) protection devices provides a comprehensive set of Battery Management System (BMS) subsystems, helping to accelerate product development for faster time-to-market.

The bq78350 controller and the bq769x0 AFE support from 3-series to 15-series cell applications. The bq78350 provides an accurate fuel gauge and state-of-health (SoH) monitor, as well as cell balancing and a full range of voltage-, current-, and temperature-based protection features.

The bq78350 offers optional LED or LCD display configurations for the capacity reporting. It also makes data available over its SMBus 1.1 interface. Battery history and diagnostic data is also kept within the device in non-volatile memory and is available over the same interface.

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Technical documentation

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Type Title Date
* Data sheet bq78350 CEDV Li-Ion Gas Gauge and Battery Management Controller Companion to the bq769x0 Battery Monitoring AFE datasheet PDF | HTML 14 Jun 2012
User guide bq76930 and bq76940 Evaluation Module (Rev. C) 10 Dec 2018
EVM User's guide bq76920 Evaluation Module User's Guide (Rev. D) 12 Nov 2018
User guide bq78350 Technical Reference Manual (Rev. B) 22 Jul 2015
Application note bq78350 Data Memory Programming for Mass Production 16 Apr 2015
Application note Using the bq78350 (Rev. A) 04 Aug 2014
Application note Using the bq78350 25 Jun 2014

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