Produktdetails

Rating Catalog Number of series cells (max) 5 Number of series cells (min) 2 Features Digital output, I2C support, Integrated ADC, LDO output, Low-side driver, Multi-cell support, One-time-programmable (OTP) memory, Open-wire detection, Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Short-current detection, Temperature sensing, Undertemperature protection, Undervoltage protection Vin (max) (V) 27.5 Communication interface I2C Device type Cell monitor and balancer, Protector Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 0 Battery overvoltage protection (max) (V) 5.5 Operating current (typ) (µA) 140
Rating Catalog Number of series cells (max) 5 Number of series cells (min) 2 Features Digital output, I2C support, Integrated ADC, LDO output, Low-side driver, Multi-cell support, One-time-programmable (OTP) memory, Open-wire detection, Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Short-current detection, Temperature sensing, Undertemperature protection, Undervoltage protection Vin (max) (V) 27.5 Communication interface I2C Device type Cell monitor and balancer, Protector Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 0 Battery overvoltage protection (max) (V) 5.5 Operating current (typ) (µA) 140
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • Battery monitoring capability for 2-series to 5-series cells
  • Integrated low-side drivers for NFET protection with optional autonomous recovery
  • Extensive protection suite including voltage, temperature, current, and internal diagnostics
  • 16-bit delta-sigma voltage ADC
    • High-accuracy cell voltage measurement of 4 mV (typical)
  • A dedicated simultaneous 16- and 24-bit delta-sigma coulomb counter ADC
    • High-accuracy current measurement with low input offset error
    • Wide-range current applications (±200-mV measurement range across sense resistor)
    • 48-bit accumulated charge integrator with timer
  • Host-controlled cell balancing
  • Multiple power modes (typical battery pack operating range conditions)
    • NORMAL mode: 32 µA to 175 µA
    • SLEEP mode: 6 µA
    • DEEPSLEEP mode: 2.7 µA
    • SHUTDOWN Mode: <1 µA
  • High voltage tolerance of 45 V on cell connect and select additional pins
  • Support for temperature sensing using an internal sensor and external thermistor
  • Integrated one-time-programmable (OTP) memory for device settings, programmed by TI
  • 400-kHz I 2C serial communications with optional CRC support
  • Programmable LDO for external system usage
  • 20-pin QFN (RGR) package
  • Battery monitoring capability for 2-series to 5-series cells
  • Integrated low-side drivers for NFET protection with optional autonomous recovery
  • Extensive protection suite including voltage, temperature, current, and internal diagnostics
  • 16-bit delta-sigma voltage ADC
    • High-accuracy cell voltage measurement of 4 mV (typical)
  • A dedicated simultaneous 16- and 24-bit delta-sigma coulomb counter ADC
    • High-accuracy current measurement with low input offset error
    • Wide-range current applications (±200-mV measurement range across sense resistor)
    • 48-bit accumulated charge integrator with timer
  • Host-controlled cell balancing
  • Multiple power modes (typical battery pack operating range conditions)
    • NORMAL mode: 32 µA to 175 µA
    • SLEEP mode: 6 µA
    • DEEPSLEEP mode: 2.7 µA
    • SHUTDOWN Mode: <1 µA
  • High voltage tolerance of 45 V on cell connect and select additional pins
  • Support for temperature sensing using an internal sensor and external thermistor
  • Integrated one-time-programmable (OTP) memory for device settings, programmed by TI
  • 400-kHz I 2C serial communications with optional CRC support
  • Programmable LDO for external system usage
  • 20-pin QFN (RGR) package

The Texas Instruments BQ76905 provides a highly integrated, high-accuracy battery monitor and protector for 2-series to 5-series Li-ion, Li-polymer, LiFePO 4 (LFP), and LTO battery packs. Each device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for host-controlled cell balancing. Integration includes low-side protection NFET drivers, a programmable LDO for external system use, and an I 2C host communication interface supporting up to 400-kHz operation with optional CRC. The BQ76905 is available in a 20-pin QFN package.

The Texas Instruments BQ76905 provides a highly integrated, high-accuracy battery monitor and protector for 2-series to 5-series Li-ion, Li-polymer, LiFePO 4 (LFP), and LTO battery packs. Each device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for host-controlled cell balancing. Integration includes low-side protection NFET drivers, a programmable LDO for external system use, and an I 2C host communication interface supporting up to 400-kHz operation with optional CRC. The BQ76905 is available in a 20-pin QFN package.

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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet BQ76905 2-Series to 5-Series High Accuracy Battery Monitor and Protector for Li-Ion, Li-Polymer, LiFePO4(LFP), and LTO Battery Packs datasheet PDF | HTML 11 Nov 2023
Application note Why is short-circuit protection more challenging for high- side driver battery packs than low-side driver? PDF | HTML 23 Jan 2026
Application note Understanding BQ76905, BQ76907 Voltage Sampling Measurement Loop PDF | HTML 11 Sep 2025
Application note Cell Balancing With BQ7690x Battery Monitors PDF | HTML 04 Jan 2024
User guide BQ7690x Software Development Guide PDF | HTML 11 Dez 2023
User guide BQ76905 Technical Reference Manual PDF | HTML 17 Nov 2023
Certificate BQ76905EVM EU Declaration of Conformity (DoC) 15 Nov 2023

Design und Entwicklung

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Evaluierungsplatine

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Benutzerhandbuch: PDF | HTML
Anwendungssoftware und Frameworks

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BQ7690X-CODE-EXAMPLES BQ7690x battery monitors code examples

Microcontroller sample code examples for interfacing with BQ7690x battery monitors and protectors.
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Referenzdesigns

TIDA-010268 — Referenzdesign zur Überwachung eines Akkupacks (5s bis 7s) mit Low-Side-MOSFET-Regelung

Bei diesem Referenzdesign handelt es sich um ein Akkupack-Design für 5s bis 7s mit hoher Zellenspannungsgenauigkeit für die Typen Lithium-Ionen (Li-Ion) und Lithium-Eisenphosphat (LiFePO4). Das Design überwacht jede Zellenspannung, den Akkustrom sowie die Temperaturen der Zellen und (...)
Design guide: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN (RGR) 20 Ultra Librarian

Bestellen & Qualität

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  • MSL-Rating / Spitzenrückfluss
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  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
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