Input/Output

Oscillator

System Clock

Power

Regulation

AND

Management

CoolRISC

CPU

Program Memory

Data Memory

Communications

SMBus

Peripherals

and

Timers

Interrupt

Controller

Analog Front End

Delta-Sigma ADC

AND

Integrating

Coulomb Counter

DMAddr (16-bit)

Data (8-bit)

PMAddr

(15-bit)

PMInst

(22-bit)

32 kHz

System Clocks

Reset*

2

1

8

8

8

Interrupt *

Event*

SRP

SRN

MRST

RBI

COM, ALERT,

KEYIN, SAFE,

SMBD, SMBC,

VEN, DISP

GPIOA

GPIOB

LED1...5

PWRM

SMBA, ADREN,

SDA, SCL,

PRECHG,VAUX,

BAT, PRES

System I /O (13 -bit)

Wake Comparator

Event*

bq78350-R1

SLUSCD0 – AUGUST 2015

www.ti.com

9 Detailed Description

9.1 Overview

The bq78350-R1 Li-Ion and LiFePO4 Battery Management Controller is the companion to the bq769x0 family of

Analog Front End (AFE) protection devices. This chipset supports from 3-series to 15-series cell applications with

capacities up to 320 Ahr, and is suitable for a wide range of portable or stationary battery applications. The

bq78350-R1 provides an accurate fuel gauge and state-of-health (SoH) monitor, as well as the cell balancing

algorithm and a full range of voltage-, current-, and temperature-based protection features.

The battery data that the bq78350-R1 gathers can be accessed via an SMBus 1.1 interface and state-of-charge

(SoC) data can be displayed through optional LED or LCD display configurations. Battery history and diagnostic

data is also kept within the device in non-volatile memory and is available over the same SMBus interface.

9.2 Functional Block Diagram

9.3 Feature Description

The following section provides an overview of the device features. For full details on the bq78350-R1 features,

refer to the bq78350-R1 Technical Reference Manual (SLUUBD3).

9.3.1 Primary (1st Level) Safety Features

The bq78350-R1 supports a wide range of battery and system protection features that can be configured. The

primary safety features include:

•

Cell over/undervoltage protection

•

Charge and discharge overcurrent

•

Short circuit protection

•

Charge and discharge overtemperature with independent alarms and thresholds for each thermistor

10

Submit Documentation Feedback

Copyright © 2015, Texas Instruments Incorporated

Product Folder Links: bq78350-R1