1 Features

• Highly integrated battery pack manager for 3 to 6

cells in series applications

– Ultra-low power 32-bit RISC processor

– ADC measurements for up to 16 cells in series

with 80V tolerance

– High Accuracy SoC and SoH with Dynamic Z

Track™ gauging algorithm

– Certificate-based security protected flash

memory

• Precision analog front end with two independent

ADCs:

– High-accuracy 18-bit integrating delta-sigma

coulomb counter

– High-accuracy 16-bit delta-sigma with input

translation and multiplexer

– Support for simultaneous current and voltage

sampling

– Supports up to eight external thermistor

measurements and an internal temperature

sensor

• Strong High-side NMOS FET drive with fast turnon

and turn-off time

• Charge pump support for pre-charge and predischarge

NMOS FET drivers

• Parallel configuration support for removable

battery with separate charger and system ports

• Cell balancing support up to 50mA bypass per cell

• Diagnostic lifetime data monitor and recorder

• Multiple host communication support:

– I2C (up to 1MHz )

– SMBus 3.2 (up to 1MHz)

• Multiple power modes for low quiescent current

operation

• SHA-1, SHA-2, or EC-KCDSA authentication for

robust battery pack security

2 Applications

• Battery backup unit (BBU)

• E-bike, e-scooter, and LEV

• Handheld vacuum cleaners and vacuum robots

• Gardening robots and power tools

• Drones

• Medical and test equipment

• Other industrial battery pack

3 Description

The Texas Instruments BQ41Z90 is a fully

integrated pack-based battery pack manager solution,

that provides a flash programmable CPU, safety

protection, and elliptical curve cryptography (ECC)

authentication for 3 to 16 cells in series Li-ion, LiFeP4,

NiMH, and Li-polymer battery packs.

The BQ41Z90 battery pack manager communicates

through SMBus v3.2 or I2C-compatible interfaces,

and combines an ultra-low-power, high-speed 32-

bit processor, high-accuracy analog measurement

capabilities, integrated flash memory, an array of

peripheral IO, an NMOS protection FET drive,

and a SHA-1, SHA-2, or EC-KCDSA authentication

responder into a complete, high-performance battery

management solution.