1 Features
• Fully integrated 1-series, 2-series, 3-series, and
4-series Li-ion or Li-polymer cell battery pack
manager and protection
• Next-generation patented Impedance Track™
technology accurately measures available charge
in Li-ion and Li-polymer batteries
• High-side N-CH protection FET drive
• Integrated cell balancing while charging or at rest
• Suitable for batteries between 100 mAh and 29 Ah
• 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
• Supports battery trip point (BTP)
• Diagnostic lifetime data monitor and black box
recorder
• LED display
• Supports two-wire SMBus v1.1 interface
• SHA-1 authentication
• IATA support
• Compact package: 32-lead QFN (RSM)

2 Applications
• Tablets
• Drones
• UPS/battery backup systems
• Medical equipment
• Handheld vacuum cleaners and vacuum robots

3 Description
The BQ40Z50-R2 device, incorporating patented
Impedance Track™ technology, is a fully integrated,
single-chip, pack-based solution that provides a rich
array of features for gas gauging, protection, and
authentication for 1-series, 2-series, 3-series, and 4-
series cell Li-ion and Li-polymer battery packs.
Using its integrated high-performance analog
peripherals, the BQ40Z50-R2 device measures and
maintains an accurate record of available capacity,
voltage, current, temperature, and other critical
parameters in Li-ion or Li-polymer batteries, and
reports this information to the system host controller
over an SMBus v1.1 compatible interface.