BQ76905

ACTIVO

Monitor y protector de baja potencia para 2S a 5S con medición de tensión de celda de alta precisión

Detalles del producto

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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* 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 ene 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 ene 2024
User guide BQ7690x Software Development Guide PDF | HTML 11 dic 2023
User guide BQ76905 Technical Reference Manual PDF | HTML 17 nov 2023
Certificate BQ76905EVM EU Declaration of Conformity (DoC) 15 nov 2023

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

BQ76905EVM — Módulo de evaluación BQ76905 para el monitor y el protector de baja potencia

El módulo de evaluación (EVM) BQ76905EVM es un sistema de evaluación completo para el BQ76905. El BQ76905 es un monitor y protector de baterías altamente integrado y de gran precisión para baterías Li-Ion, LiPolymer y LiFePO4 de las series 2 a 5. El EVM incluye un circuito integrado (IC) BQ76905, (...)
Guía del usuario: PDF | HTML
Software de aplicación y estructura

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 (...)

Productos y hardware compatibles

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Opciones de descarga
Controlador o biblioteca

BQ7690X-CODE-EXAMPLES BQ7690x battery monitors code examples

Microcontroller sample code examples for interfacing with BQ7690x battery monitors and protectors.
Productos y hardware compatibles

Productos y hardware compatibles

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Diseños de referencia

TIDA-010268 — Diseño de referencia de un monitor de sistema de baterías de 5 a 7 segundos con control MOSFET de la

Este diseño de referencia es un diseño de un sistema de baterías de iones de litio (Li‑ion) y fosfato de hierro y litio (LiFePO4) con alta precisión de voltaje de celda de 5 a 7 segundos. El diseño supervisa con gran precisión la tensión de cada celda, la corriente de la batería y la temperatura de (...)
Design guide: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RGR) 20 Ultra Librarian

Pedidos y calidad

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  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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