BQ76972中文资料适用于锂离子、锂聚合物和磷酸铁锂电池的 3 节至 16 节串联高精度电池监控器和保护器数据手册TI规格书

描述 Description

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.

特性 Features

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)