BQ76972

ACTIVO

Monitor y protector de bat. alta precisión 3s a 16s para ion de litio, polímero de litio y LiFePO4

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Hoja de datos

document-pdfAcrobat BQ76972 3-Series to 16-Series High Accuracy Battery Monitor and Protector for Li-Ion, Li-Polymer, and LiFePO4Battery Packs datasheet (Inglés) PDF | HTML

Guías de usuario

document-pdfAcrobat
BQ76972 Technical Reference Manual (Inglés)

BQ76972

ACTIVO

Hoja de datos

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Detalles del producto

Rating

Catalog

Number of series cells (max)

Number of series cells (min)

Features

Autonomous Mode, Coulomb Counter, Digital output, High-side FET drive, I2C support, LDO output, Low-Power Sleep Mode, Multi-cell support, One-Time Programmable (OTP) memory, Open wire (OW), Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Power-save mode, Scratchpad memory, Short-current detection, Sleep Mode, Temperature sensing, Undertemperature protection, Undervoltage protection

Vin (max) (V)

Communication interface

HDQ, I2C, SPI

Device type

Cell monitor and balancer, Protector

Operating temperature range (°C)

-40 to 85

Battery overvoltage protection (min) (V)

1.012

Battery overvoltage protection (max) (V)

5.566

Rating

Catalog

Number of series cells (max)

Number of series cells (min)

Features

Vin (max) (V)

Communication interface

HDQ, I2C, SPI

Device type

Cell monitor and balancer, Protector

Operating temperature range (°C)

-40 to 85

Battery overvoltage protection (min) (V)

1.012

Battery overvoltage protection (max) (V)

5.566

TQFP (PFB)

81 mm² (9 mm × 9 mm)

Battery monitoring capability for 3-series to 16-series cells
High accuracy cell voltage measurement of ±3.0 mV
Integrated charge pump for high-side NFET protection with optional autonomous recovery
Extensive protection suite including voltage, temperature, current, and internal diagnostics
Two independent ADCs
- Support for simultaneous current and voltage sampling
- High-accuracy coulomb counter with input offset error < 1 µV (typical)
Wide-range current applications (±200-mV measurement range across sense resistor)
Integrated secondary chemical fuse drive protection
Autonomous or host-controlled cell balancing
Multiple power modes (typical battery pack operating range conditions)
- NORMAL mode: 286 µA
- Multiple SLEEP mode options: 24 µA to 41 µA
- Multiple DEEPSLEEP mode options: 9 µA to 10 µA
- SHUTDOWN mode: 1 µA
High-voltage tolerance of 85 V on cell connect and select additional pins
Tolerant of random cell attach sequence on production line
Support for temperature sensing using internal sensor and up to nine external thermistors
Integrated one-time-programmable (OTP) memory programmable by customers on production line
Communication options include 400-kHz I 2C, SPI, and HDQ one-wire interface
Dual-programmable LDOs for external system usage
48-pin TQFP package (PFB)

Battery monitoring capability for 3-series to 16-series cells
High accuracy cell voltage measurement of ±3.0 mV
Integrated charge pump for high-side NFET protection with optional autonomous recovery
Extensive protection suite including voltage, temperature, current, and internal diagnostics
Two independent ADCs
- Support for simultaneous current and voltage sampling
- High-accuracy coulomb counter with input offset error < 1 µV (typical)
Wide-range current applications (±200-mV measurement range across sense resistor)
Integrated secondary chemical fuse drive protection
Autonomous or host-controlled cell balancing
Multiple power modes (typical battery pack operating range conditions)
- NORMAL mode: 286 µA
- Multiple SLEEP mode options: 24 µA to 41 µA
- Multiple DEEPSLEEP mode options: 9 µA to 10 µA
- SHUTDOWN mode: 1 µA
High-voltage tolerance of 85 V on cell connect and select additional pins
Tolerant of random cell attach sequence on production line
Support for temperature sensing using internal sensor and up to nine external thermistors
Integrated one-time-programmable (OTP) memory programmable by customers on production line
Communication options include 400-kHz I 2C, SPI, and HDQ one-wire interface
Dual-programmable LDOs for external system usage
48-pin TQFP package (PFB)

The Texas Instruments BQ76972 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Li-polymer, and LiFePO 4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host controlled cell balancing. Integration includes high-side charge-pump NFET drivers, dual programmable LDOs for external system use, and a host communication peripheral supporting 400-kHz I 2C, SPI, and HDQ one-wire standards. The BQ76972 device is available in a 48-pin TQFP package.

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Documentación técnica

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Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Hoja de datos	BQ76972 3-Series to 16-Series High Accuracy Battery Monitor and Protector for Li-Ion, Li-Polymer, and LiFePO4Battery Packs datasheet	PDF \| HTML	23/11/2023
*	Guía del usuario	BQ76972 Technical Reference Manual	PDF \| HTML	26/06/2023
	Nota sobre la aplicación	Why is short-circuit protection more challenging for high- side driver battery packs than low-side driver?	PDF \| HTML	23/01/2026
	Nota sobre la aplicación	Enhance Temperature Measurement Performance With BQ769x2 and TMP6x for Battery Management System	PDF \| HTML	14/11/2025
	Nota sobre la aplicación	Design Considerations of Current Sensing With BQ769x2 Family for Battery Management System (Rev. A)	PDF \| HTML	1/08/2025
	Nota sobre la aplicación	BQ769x2 Frequently Asked Questions	PDF \| HTML	29/03/2024
	Artículo técnico	3 major design challenges to solve in battery energy storage systems	PDF \| HTML	30/01/2024
	Application brief	Scaling accurate battery management designs across energy storage systems	PDF \| HTML	20/10/2023
	Nota sobre la aplicación	Design Considerations of Stacked BQ769x2 With High-Side N-MOSFET	PDF \| HTML	9/02/2023
	Artículo técnico	Pack a punch in battery pack systems with low-cost MCUs	PDF \| HTML	16/11/2021
	Nota sobre la aplicación	Pin Equivalent Diagrams for the BQ76952, BQ76942, and BQ769142		6/05/2021
	Nota sobre la aplicación	BQ76952 High Voltage Stress Report	PDF \| HTML	25/02/2021
	Artículo técnico	How to stack battery monitors for high-cell-count industrial applications	PDF \| HTML	11/02/2021
	Nota sobre la aplicación	BQ76942 IEC ESD 61000-4-2 ESD Test Report		16/11/2020
	Artículo técnico	CURRENTly questioning the accuracy of your battery monitor? Improve battery safety	PDF \| HTML	28/05/2020
	Artículo técnico	Improving voltage measurement accuracy in battery monitoring systems	PDF \| HTML	1/04/2020
	Artículo técnico	Improving temperature measurement accuracy in battery monitoring systems	PDF \| HTML	20/02/2020
	Nota sobre la aplicación	Parallel Paths with the BQ769x2 Battery Monitor		9/01/2020
	Artículo técnico	Next-generation battery monitors: how to improve battery safety while improving ac	PDF \| HTML	6/01/2020

Diseño y desarrollo

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Software de aplicación y estructura

BQ769X2-THERMISTOR-COEFF-CALCULATOR — Optimizador de temperatura de termistor BQ76952/42: calcula los coeficientes de los termistores para

The BQ769x2 family of battery monitors can support multiple external thermistors. The device includes an internal pullup resistor to bias the thermistor during measurement. The internal pullup resistor has two options which can set the pullup to 18 kΩ or 180 kΩ. The 18-kΩ option (...)