BQ40Z50-R2 Datasheet, PDF (22/51 Pages) Texas Instruments – 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

bq40z50-R2
SLUSCS4 – JUNE 2017
8 Detailed Description
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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 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, including a diagnostic lifetime data monitor and black box recorder.
8.2 Functional Block Diagram
SRP
SRN
TS1
TS2
TS3
TS4
Cell
Balancing
Cell Detach
Detection
Wake
Comparator
Cell, Stack,
Pack
Voltage
Short Circuit
Comparator
Over
Current
Comparator
NTC Bias
Voltage
Reference 1
ADC/CC
FRONTEND
ADC MUX
Low
Frequency
Oscillator
Power Mode
Control
Power On
Reset
Voltage
Reference 2
Random
Number
Generator
Internal
Temp
Sensor
High Side
N-CH FET
Drive
Zero Volt
Charge
Control
P-CH
FET Drive
PTC
Overtemp
FUSE
Control
High
Voltage
I/O
Watchdog
Timer
LED Display
Drive I/O
AFE Control
1.8V LDO
Regulator
AFE COM
Engine
SBS High
Voltage
Translation
PTCEN
PTC
FUSE
BTP_INT
/PRES or /SHUTDN
/DISP
LEDCNTLC
LEDCNTLB
LEDCNTLA
SMBD
SMBC
Low Voltage
I/O
ADC/CC
Digital Filter
bqBMP
CPU
PMInstr
(8bit)
PMAddr
(16bit)
Program
Flash
EEPROM
Data Flash
EEPROM
High
Frequency
Oscillator
I /O
Timers &
PWM
I/O &
Interrupt
Controller
Data (8bit)
DMAddr (16bit)
Data
SRAM
AFE COM
Engine
SBS COM
Engine
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