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.