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BQ4050

ACTIVE

1-4 series CEDV battery fuel (gas) gauge

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Data sheet

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BQ40Z50-R2 ACTIVE 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0

SHA-1 authentication, TURBO mode 2.0, black box recorder, adaptive charging

BQ4050

ACTIVE
Data sheet Order now

Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, Single Cell Communication interface SMBus Battery capacity (Min) (mAh) 500 Battery capacity (Max) (mAh) 65000 Implementation Pack External capacity indication LED Features CEDV algorithm, Cell Balancing, Integrated Protector, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, Single Cell Communication interface SMBus Battery capacity (Min) (mAh) 500 Battery capacity (Max) (mAh) 65000 Implementation Pack External capacity indication LED Features CEDV algorithm, Cell Balancing, Integrated Protector, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal
VQFN (RSM) 32 16 mm² 4 x 4
  • High-Side Protection N-CH FET Drive Enables Serial Bus Communication During Fault Conditions
  • Cell Balancing with Internal Bypass Optimizes Battery Health
  • Diagnostic Lifetime Data Monitor and Black Box Recorder for Failure Analysis
  • Full Array of Programmable Protection Features: Voltage, Current, Temperature
  • JEITA Charge Algorithms Support Smart Charging
  • Analog Front End with Two Independent ADCs
    • Simultaneous Current and Voltage Sampling
    • High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
  • Supports Battery Trip Point (BTP) Function for Windows® Integration
  • LED Display for State of Charge and Battery Status Indication
  • 100-KHz SMBus v1.1 Communications Interface for Programming and Data Access with Alternate 400-KHz Mode
  • SHA-1 Authentication Responder for Increased Battery Pack Security
  • Compact 32-Pin VQFN Package (RSM)
  • High-Side Protection N-CH FET Drive Enables Serial Bus Communication During Fault Conditions
  • Cell Balancing with Internal Bypass Optimizes Battery Health
  • Diagnostic Lifetime Data Monitor and Black Box Recorder for Failure Analysis
  • Full Array of Programmable Protection Features: Voltage, Current, Temperature
  • JEITA Charge Algorithms Support Smart Charging
  • Analog Front End with Two Independent ADCs
    • Simultaneous Current and Voltage Sampling
    • High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
  • Supports Battery Trip Point (BTP) Function for Windows® Integration
  • LED Display for State of Charge and Battery Status Indication
  • 100-KHz SMBus v1.1 Communications Interface for Programming and Data Access with Alternate 400-KHz Mode
  • SHA-1 Authentication Responder for Increased Battery Pack Security
  • Compact 32-Pin VQFN Package (RSM)

The Texas Instruments bq4050 device, incorporating Compensated End-of-Discharge Voltage (CEDV) technology, is a highly integrated, accurate, 1-series to 4-series cell gas gauge and protection solution, enabling autonomous charger control and cell balancing.

The bq4050 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for Li-Ion and Li-Polymer battery packs.

The bq4050 gas gauge communicates via an SMBus-compatible interface and combines an ultra-low power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-CH FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

The Texas Instruments bq4050 device, incorporating Compensated End-of-Discharge Voltage (CEDV) technology, is a highly integrated, accurate, 1-series to 4-series cell gas gauge and protection solution, enabling autonomous charger control and cell balancing.

The bq4050 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for Li-Ion and Li-Polymer battery packs.

The bq4050 gas gauge communicates via an SMBus-compatible interface and combines an ultra-low power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-CH FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

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Technical documentation

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Type Title Date
* Data sheet bq4050 CEDV Gas Gauge and Protection Solution for 1-Series to 4-Series Cell Li-Ion Battery Packs datasheet (Rev. B) PDF | HTML 09 Oct 2017
User guide BQ4050 Technical Reference Manual (Rev. A) PDF | HTML 26 Oct 2022
Application note Autonomous Smart Battery Guide PDF | HTML 15 Oct 2021
User guide Simple Guide to CEDV Data Collection for Gauging Parameter Calculator (GPC) (Rev. B) 30 Jan 2018
Technical article How to choose a multicell gauge 16 Dec 2016
EVM User's guide bq4050EVM-561 Evaluation Module User’s Guide 30 Mar 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ4050EVM-561 — 1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module

BQ4050EVM is a complete system useful for evaluating the functionality of the bq4050 fuel gauge using the CEDV gauging algorithm. As described on the BQ4050 product folder, this gauge is appropriate for applications powered by multi-cell battery systems. The EVM includes one bq4050 circuit module, (...)
User guide: PDF
Not available on TI.com
Application software & framework

BQPRODUCTION — Production tool for fourth generation multicell battery fuel (gas) gauges

bqProduction offers a full suite of robust tools to assist with the process of configuring, calibrating, manufacturing and tracking printed circuit boards utilizing TI Battery Battery management products. This includes features that allow writing a golden image followed by different types of (...)
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Application software & framework

BQSTUDIO-STABLE — Battery Management Studio (bqStudio) Software – stable version downloads for bq series of TI battery fuel gauges

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76942 — 3-series to 10-series multicell battery monitor and protector BQ76952 — 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4
Battery charger ICs
BQ24800 — SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 — SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 — I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 — I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25790 — Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 — I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 — Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 — Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 — System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A — System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B — System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27510-G3 — System-side Impedance-Track fuel gauge that provides 32 bytes of user-programmable data Flash memory BQ27520-G4 — System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 — System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 — Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 — Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27541-G1 — Pack-side Impedance Track™ battery fuel gauge with integrated LDO BQ27541-V200 — Single cell Li-ion battery fuel gauge for battery pack Integration; FW upgrade to BQ27541 BQ27542-G1 — Single cell Impedance Track™ pack side fuel gauge with SON package BQ27545-G1 — Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 — Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 — System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 — Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 — Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 — Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 — Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 — Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 — 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 — 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 — Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 — 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 — Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 — CEDV li-ion gas gauge and battery management controller BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Software
Download options
Application software & framework

BQSTUDIO-TEST — Battery Management Studio (bqStudio) Software – Beta version downloads

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ769142 — 3-s to 14-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 battery BQ76942 — 3-series to 10-series multicell battery monitor and protector BQ76952 — 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4
Battery charger ICs
BQ24800 — SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 — SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 — I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 — I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25790 — Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 — I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 — Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 — Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 — System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A — System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B — System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27510-G3 — System-side Impedance-Track fuel gauge that provides 32 bytes of user-programmable data Flash memory BQ27520-G4 — System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 — System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 — Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 — Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27541-G1 — Pack-side Impedance Track™ battery fuel gauge with integrated LDO BQ27541-V200 — Single cell Li-ion battery fuel gauge for battery pack Integration; FW upgrade to BQ27541 BQ27542-G1 — Single cell Impedance Track™ pack side fuel gauge with SON package BQ27545-G1 — Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 — Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 — System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 — Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 — Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z746 — Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 — Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 — Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 — Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 — 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 — 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 — Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 — 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 — Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 — CEDV li-ion gas gauge and battery management controller BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Hardware development
MKST-3P-ALT-EV2300 — MKS Technology alternative for EV2300 communications transceiver
Software
Download options
Application software & framework

GPCCEDV — Gauging Parameter Calculator for CEDV gauges

Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)
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Reference designs

TIDA-00982 — Non-Military Drone, Robot, or RC 2S1P Battery Management Solution Reference Design

This reference design is for a 2S1P battery management solution (BMS) for non-military drone, robot or radio controlled (RC) projects and designs. Quickly add gauging, protection, balancing and charging to any new design for a non-military drone, robot or RC product or use this reference design to (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
VQFN (RSM) 32 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
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  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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