Produktdetails

Number of series cells (min) 9 Vin (max) (V) 75 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Device type Cell monitor and balancer Number of series cells (max) 15 Operating temperature range (°C) -40 to 85 Rating Catalog Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Communication interface I2C Operating current (typ) (µA) 40
Number of series cells (min) 9 Vin (max) (V) 75 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Device type Cell monitor and balancer Number of series cells (max) 15 Operating temperature range (°C) -40 to 85 Rating Catalog Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Communication interface I2C Operating current (typ) (µA) 40
TSSOP (DBT) 44 71.36 mm² 11.15 x 6.4
  • AFE monitoring features
    • Pure digital interface
    • Internal ADC measures cell voltage, die temperature, and external thermistor
    • A separate, internal ADC measures pack current (coulomb counter)
    • Directly supports up to three thermistors (103AT)
  • Hardware protection features
    • Overcurrent in Discharge (OCD)
    • Short Circuit in Discharge (SCD)
    • Overvoltage (OV)
    • Undervoltage (UV)
    • Secondary protector fault detection
  • Additional features
    • Integrated cell balancing FETs
    • Charge, discharge low-side NCH FET drivers
    • Alert interrupt to host microcontroller
    • 2.5-V or 3.3-V output voltage regulator
    • No EEPROM programming necessary
    • High supply voltage absolute maximum (up to 108 V)
    • Simple I2C compatible interface (CRC option)
    • Random cell connection tolerant
  • AFE monitoring features
    • Pure digital interface
    • Internal ADC measures cell voltage, die temperature, and external thermistor
    • A separate, internal ADC measures pack current (coulomb counter)
    • Directly supports up to three thermistors (103AT)
  • Hardware protection features
    • Overcurrent in Discharge (OCD)
    • Short Circuit in Discharge (SCD)
    • Overvoltage (OV)
    • Undervoltage (UV)
    • Secondary protector fault detection
  • Additional features
    • Integrated cell balancing FETs
    • Charge, discharge low-side NCH FET drivers
    • Alert interrupt to host microcontroller
    • 2.5-V or 3.3-V output voltage regulator
    • No EEPROM programming necessary
    • High supply voltage absolute maximum (up to 108 V)
    • Simple I2C compatible interface (CRC option)
    • Random cell connection tolerant

The BQ769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.

The BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930 handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a host controller can use the BQ769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.

The BQ769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.

The BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930 handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a host controller can use the BQ769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet BQ769x0 3-Series to 15-Series Cell Battery Monitor Family for Li-Ion and Phosphate Applications datasheet (Rev. I) PDF | HTML 14 Mär 2022
Technical article Power to the pedal: Achieving longer-lasting 13S, 48-V lithium-ion battery packs f (Rev. A) PDF | HTML 16 Mai 2024
User guide bq76920, bq76930, bq76940 AFE FAQ (Rev. A) PDF | HTML 01 Okt 2021
White paper Powering Alternative Forms of Transportation with Industrial Battery Packs 19 Feb 2020
Technical article Fast and furious: designing longer-lasting 16S-17S Li-ion battery packs for e-moto PDF | HTML 21 Nov 2019
Technical article Protector, monitor or gauge – selecting the correct battery electronics for your L PDF | HTML 13 Jun 2019
Application note BQ769x0 Pin Equivalent Diagrams (Rev. A) 03 Apr 2019
User guide bq76930 and bq76940 Evaluation Module (Rev. C) 10 Dez 2018
Application note UART-Based Communication Protocol for Intermodule Communication of Light Vehicle 17 Mai 2017
Application note bq769x0 BMS Configurations for Cordless Appliances 23 Mär 2017
Application note Fault Monitoring for High-Availability Systems using the bq769x0 03 Feb 2017
Application note Embedded Scheduler in Cell Battery Monitor of the bq769x0 10 Aug 2016
Application note bq769x0 Family Top 10 Design Considerations (Rev. A) PDF | HTML 02 Mai 2016
Application note bq769x0 boot switch alternatives 21 Dez 2015
Application note I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B) 14 Mai 2014

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

BQ76940EVM — µC-gesteuerte AFE-Familie für Li-Ionen- und Phosphat-Zellen der 5/10/15-Serie – Evaluierungsmodul

The bq76940EVM is a populated circuit board for evaluation of the bq76940 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 9 to 15-series Lithium Ion, Lithium iron phosphate, and more battery (...)

Benutzerhandbuch: PDF
Firmware

SLUC583 bq769x0 I2C Sample Code With CRC

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Batterieüberwachung & Ausgleichsregler
BQ76920 Monitor für Li-Ion- und Li-Phosphat-Batterien mit 3 bis 5 seriellen Zellen (bq76940-Familie) BQ76930 Monitor für Li-Ion- und Li-Phosphat-Batterien mit 6 bis 10 seriellen Zellen (bq76940-Familie) BQ76940 Monitor zur Überwachung von Li-Ionen- und Li-Phosphatakkus mit 9 bis 15 in Serie geschalteten (bq769
Support-Software

SLUC539 bq76940/bq76930/bq76920 Evaluation Software

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Batterieüberwachung & Ausgleichsregler
BQ76920 Monitor für Li-Ion- und Li-Phosphat-Batterien mit 3 bis 5 seriellen Zellen (bq76940-Familie) BQ76930 Monitor für Li-Ion- und Li-Phosphat-Batterien mit 6 bis 10 seriellen Zellen (bq76940-Familie) BQ76940 Monitor zur Überwachung von Li-Ionen- und Li-Phosphatakkus mit 9 bis 15 in Serie geschalteten (bq769
Hardware-Entwicklung
Evaluierungsplatine
BQ76920EVM µC-gesteuerte AFE-Familie für Li-Ionen- und Phosphat-Zellen der 5/10/15-Serie – Evaluierungsmodul BQ76930EVM µC-gesteuerte AFE-Familie für 5/10/15-Zellen mit Li-Ion und Phosphat – Evaluierungsmodul BQ76940EVM µC-gesteuerte AFE-Familie für Li-Ionen- und Phosphat-Zellen der 5/10/15-Serie – Evaluierungsmodul
Referenzdesigns

TIDA-010030 — Präzise Messung und Referenzdesign für Li-Ionen-Akkupack mit 50-μA-Standby-Strom, 13 Zellen und 48 V

This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-010074 — 16S–17S Referenzdesign für Akkupacks mit geringem Stromverbrauch

Dieses Referenzdesign ist ein Li-Ion-Akkupack-Design mit niedrigem Stromverbrauch im Standby- und Transportmodus (16S–17S LiFePO4) für Backup- und Emulatorzyklen von Telekommunikationsbatterien. Das Design wurde für eine 2-lagige Leiterplatte implementiert. Das 9S-15S-AFE bq76940 überwacht die (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00792 — Referenzdesign für Batterie-Management-System mit mehreren 36- bis 48-V-Batterien

This reference design provides monitoring, balancing, primary protection and gauging for a 12- to 15-cell lithium-ion or lithium-iron phosphate-based batteries. This board is intended to be mounted in an enclosure for industrial systems. The reference design provides battery protection and gauging (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00255 — Analog-Frontend-Referenzdesign für Lithium-Ion-Akkucontroller mit 15 Zellen

The TIDA00255 reference design utilizes the bq76940 analog front end (AFE) IC.  It measures cell voltages, and die temperature or external thermistor voltage using a 14 bit ADC.  Current is measured separately by a separate 16 bit coulomb counter.  The design can turn off low side (...)
Test report: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
TSSOP (DBT) 44 Ultra Librarian

Bestellen & Qualität

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  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
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