# bq40z50 Li-Ion Battery Pack Manager

## Features & Applications
️· Features: Fully integrated 1-4 series Li-Ion/Li-Polymer battery pack manager & protection, Impedance Track™ technology for accurate charge measurement, high-side N-CH FET drive, integrated cell balancing, programmable protection features, sophisticated charge algorithms, diagnostic lifetime data monitor, SMBus v1.1 interface, SHA-1 authentication.
️· Applications: Notebook/Netbook PCs, Medical & Test Equipment, Portable Instrumentation.

## Description
The bq40z50 is a single-chip solution for gas gauging, protection, and authentication of 1-4 series Li-Ion/Li-Polymer battery packs. It uses patented Impedance Track™ technology to measure available capacity, voltage, current, temperature, and other critical battery parameters, and communicates this data to a host controller via SMBus. It provides 1st and 2nd level safety protection against various fault conditions.

## Key Specifications
️· Cell Support: 1-4 series Li-Ion/Li-Polymer
️· Interface: SMBus v1.1
️· Protection: Overvoltage, undervoltage, overcurrent, short-circuit, overload, overtemperature, and other cell/pack related faults.
️· Authentication: SHA-1 Authentication with secure memory.
️· Package: 32-lead QFN

## Pinout Highlights
️· BAT: Primary Power Supply Input
️· PACK: Pack Sense Input
️· VCC: Secondary Power Supply Input

️· SMBD/SMBC: SMBus Data/Clock
️· CHG/DSG: Charge/Discharge FET Drive
️· PCHG: Precharge FET Drive

## Thermal Information
️· Thermal Resistance (junction-to-ambient): 47.4 °C/W (RSM package)

## Absolute Maximum Ratings
️· Supply Voltage: -0.3 to 30 V
️· Operating Temperature: -40 to 110 °C

## Ordering Information
️· Available in RSM package for tube or reel quantities.