1 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 I2C, SPI,

and HDQ one-wire interface

• Dual-programmable LDOs for external system

usage

• 48-pin TQFP package (PFB)

2 Applications

• Energy storage systems

• Battery backup unit (BBU)

• E-bike, e-scooter, and LEV

• Cordless power tools and garden tools

• Non-military drones

• Other industrial battery pack (≥10series)

3 Description

The Texas Instruments BQ76972 device is a

highly integrated, high-accuracy battery monitor

and protector for 3-series to 16-series Li-ion, Lipolymer,

and LiFePO4 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 I2C, SPI, and HDQ one-wire standards.

The BQ76972 device is available in a 48-pin TQFP

package.