BQ40Z50-R2 datasheet(24/55 Pages) TI2

24 / 55 page

8 Detailed Description

8.1 Overview

The BQ40Z50-R2 device, incorporating patented Impedance Track™ technology, provides cell balancing while

charging or at rest. This fully integrated, single-chip, pack-based solution, including a diagnostic lifetime data

monitor and black box recorder, 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.

8.2 Functional Block Diagram

DMAddr (16bit)

Cell

Balancing

Over

Current

Comparator

Short Circuit

Comparator

Power On

Reset

Voltage

Reference2

Watchdog

Timer

Zero Volt

Charge

Control

Wake

Comparator

Internal

Temp

Sensor

Random

Number

Generator

AFE Control

ADC MUX

Cell Detach

Detection

High

Frequency

Oscillator

SBS COM

Engine

AFE COM

Engine

I/O &

Interrupt

Controller

Data Flash

EEPROM

ADC/CC

Digital Filter

Program

Flash

EEPROM

bqBMP

CPU

Timers &

PWM

PMAddr

(16bit)

PMInstr

(8bit)

Cell, Stack,

Pack

Voltage

Reference1

SMBC

SMBD

LEDCNTLA

LEDCNTLB

LEDCNTLC

PRES or SHUTDN

BTP_INT

FUSE

PTCEN

SRP

High Side

N-CH FET

Drive

P-CH

FET Drive

FUSE

Control

High

Voltage

I/O

LED Display

Drive I/O

Power Mode

Control

SBS High

Voltage

Translation

Low

Frequency

Oscillator

ADC/CC

FRONTEND

1.8V LDO

Regulator

TS1

TS2

TS3

TS4

Low Voltage

I/O

PTC

Overtemp

PTC

SRN

AFE COM

Engine

Data

SRAM

Data (8bit)

I /O

NTC Bias

DISP

BQ40Z50-R2

SLUSCS4C – JUNE 2017 – REVISED APRIL 2021

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