BQ27750 Datasheet, PDF (15/34 Pages) Texas Instruments – Impedance Track Battery Gas Gauge and Protection Solution for 1-Series Cell Li-Ion Battery Packs

www.ti.com
7 Detailed Description
bq27750
SLUSCM7 – JUNE 2017
7.1 Overview
The bq27750 gas gauge is a fully integrated battery manager that employs flash-based firmware and integrated
hardware protection to provide a complete solution for battery-stack architectures composed of 1-series cells.
The bq27750 device interfaces with a host system via an I²C protocol. High-performance, integrated analog
peripherals enable support for a sense resistor down to 1 mΩ and simultaneous current/voltage data conversion
for instant power calculations. The following sections detail all of the major component blocks included as part of
the bq27750 device.
7.2 Functional Block Diagram
The Functional Block Diagram depicts the analog (AFE) and digital (AGG) peripheral content in the bq27750
device.
AD0/RC0 (TS1)
Cell Detach
Detection
Wake
Comparator
Cell, Stack,
Pack
Voltage
Power Mode
Control
Power On
Reset
Short Circuit
Comparator
Over
Current
Comparator
NTC Bias
Voltage
Reference 1
ADC/CC
FRONTEND
Voltage
Reference 2
Watchdog
Timer
Internal
Temp
Sensor
ADC MUX AFE Control
Low
Frequency
Oscillator
AFE COM
Engine
High Side
N-CH FET
Drive
Zero Volt
Charge
Control
Interrupt
Internal
Reset
1.8-V LDO
Regulator
SRP
SRN
Low Voltage
I/O
In-Circuit
Emulator
ADC/CC
Digital Filter
High
Frequency
Oscillator
I/ O
Timers &
PWM
I/O &
Interrupt
Controller
AFE COM
Engine
COM
Engine
SDA
SCL
PMInstr
(8 bit)
bqBMP
CPU
PMAddr
(16 bit)
Program
Flash
EEPROM
Data Flash
EEPROM
Data (8 bit)
DMAddr (16 bit)
Data
SRAM
Copyright © 2017, Texas Instruments Incorporated
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: bq27750
Submit Documentation Feedback
15