1 Features

1• Compensated end-of-discharge voltage (CEDV)

gauging algorithm

• Supports SMBus host communication

• Flexible configuration for 3- to 5-series

(BQ76920), 6- to 10-series (BQ76930), and 9- to

15-series (BQ76940) li-ion and LiFePO4 batteries

• Supports battery configurations up to 320 Ahr

• Supports charge and discharge current reporting

up to 320 A

• On-chip temperature sensor option

• External NTC thermistor support from companion

AFE

• Full array of programmable protection features

– Voltage, current, and temperature

– System components

• Lifetime data logging

• Supports CC-CV charging, including precharge,

charge inhibit, and charge suspend

• Offers an optional resistor programmable SMBus

slave address for up to eight different bus

addresses

• Drives up to a 5-segment LED or LCD display for

state-of-charge indication

• Provides SHA-1 authentication

2 Applications

• Light electric vehicles (levs): ebikes, escooters,

pedelec, and pedal-assist bicycles

• Power and gardening tools

• Battery backup and uninterruptible power supply

(UPS) systems

• Wireless base station backup systems

• Telecom power systems

• Handheld vacuum cleaners and robot vacuums

3 Description

The Texas Instruments BQ78350-R1A li-ion and

LiFePO4 Battery Management Controller and

companion to the BQ769x0 family of analog front end

(AFE) protection devices provides a comprehensive

set of Battery Management System (BMS)

subsystems, helping to accelerate product

development for faster time-to-market.

The BQ78350-R1A controller and the BQ769x0 AFE

support 3-series to 15-series cell applications. The

BQ78350-R1A device provides an accurate fuel

gauge and state-of-health (SoH) monitor, as well as

cell balancing and a full range of voltage-, current-,

and temperature-based protection features.