1 Features

• Fully integrated 2-series to 6-series Li-ion or Lipolymer

cell battery pack manager and protection

• Next-generation patented Impedance Track™

technology accurately measures available charge

in Li-ion and Li-polymer batteries

• Configurable multifunction pins to support a variety

of applications

• Supports either elliptic curve cryptography (ECC)

or SHA-1 authentication

• High-side N-channel protection FET drive

• Integrated cell balancing while charging or at rest

• Supports 29Ah batteries natively, and larger

capacities with scaling

• Full array of programmable protection features

– Voltage

– Current

– Temperature

– Charge timeout

– CHG/DSG FETs

– AFE

• Sophisticated charge algorithms

– JEITA

– Enhanced charging

– Adaptive charging

– Cell balancing

• Supports TURBO Mode 2.0/Intel® Dynamic Battery

Power Technology (DBPTv2)

• Diagnostic lifetime data monitor and black box

recorder

• LED display

• Supports two-wire SMBus v1.1 interface

• IATA support

• Compact package: 32-lead QFN (RSM)

2 Applications

• Industrial appliances and robots

• Handheld garden and power tools

• Battery powered vacuums

• Energy storage systems and UPS

3 Description

The BQ40Z80 device is a fully integrated, singlechip

option that incorporates patented Impedance

Track technology. The BQ40Z80 device provides a

range of features for gas gauging, protection, and

authentication, supporting 2-series to 6-series cell Liion

and Li-polymer battery packs.

Using integrated high-performance analog

peripherals, the BQ40Z80 device measures and

maintains an accurate record of available capacity,

voltage, current, temperature, and other critical

parameters in Li-ion or Li-polymer batteries. The

record is reported to the system host controller over

an SMBus v1.1 compatible interface.

Elliptic curve cryptography (ECC) or SHA-1

authentication with secure memory for authentication

keys enables identification of genuine battery packs.

The BQ40Z80 device supports TURBO Mode 2.0/

Intel Dynamic Battery Power Technology (DBPTv2) by

providing the available max power and max current to

the host system. The device has eight multifunction

pins that can be configured as thermal inputs, ADC

inputs, general purpose input/output (GPIO) pins, a

presence pin, LED functions, display button input,

or other functions. Status and flag registers are

mappable to the GPIOs and used as interrupts to the

host processor.

The BQ40Z80 device provides software-based 1stand

2nd-level safety protection against overvoltage,

undervoltage, overcurrent, short-circuit current,

overload, and overtemperature conditions, as well

as other pack-related and cell-related faults. The

compact 32-lead QFN package minimizes the

cost and size for smart batteries, while providing

maximum functionality and safety for battery gauging

applications.