Monitoring/protection/cell-balancing
This sub-system is responsible for monitoring and protecting the battery pack. The data that is monitored includes individual cell voltage and pack temperature. It also implements active/passive cell balancing of each battery cell inside the battery pack. Additionally it can control the charge and discharge FET present in the battery pack.
Products
Battery monitors & balancers
BQ79718-Q1—Automotive 18-s precise battery monitor, balancer and integrated protector compliant to ASIL-D
Battery protectors
BQ77205—Ultra-low-power voltage protector for 3-series to 5-series cell Li-ion battery
BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer
BQ77207—3-series to 7-series cell Li-ion battery, internal delay timer, voltage and temperature protector
BQ77207—3-series to 7-series cell Li-ion battery, internal delay timer, voltage and temperature protector
BQ7718—Family 2-5S Overvoltage Protector with Internal Delay Timer
BQ76200—High-side n-channel FET driver
BQ7716—Family Overvoltage Protection for 2 to 4-Series Cell Li-Ion Batts w Ext Delay Capacitor
Fuel gauge/battery management controller
This subsystem consists of control unit that can communicate and configure the battery analog front end. It also implements the State of Charge (SoC) and State of Health (SoH) monitoring of the battery pack. Additionally it can implement a communication interface outside of the battery-pack for status monitoring and indication purposes.
Products
MSP430 microcontrollers
MSP430FR2433—16 MHz MCU with 16KB FRAM, 4KB SRAM, 10-bit ADC, UART/SPI/I2C, timer
MSP430G2553—16 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer
MSP430FR2155—24 MHz MCU with 32KB FRAM, 4KB SRAM, comparator, 12-bit ADC, UART/SPI/I2C, timer
Linear & low-dropout (LDO) regulators
TPS709—150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable
TPS715—50mA 24V ultra-low-IQ low-dropout (LDO) voltage regulator
TLV709—150-mA 30-V low-dropout (LDO) linear regulator with 3.2-μA supply current
Low-power 2.4-GHz products
CC2642R—SimpleLink™ 32-bit Arm Cortex-M4F Bluetooth® Low Energy wireless MCU with 352kB Flash
Charge/discharge power stage
The Charge/Discharge Power Stage is used to protect the battery pack from abnormalities such as over voltage, over current charging/discharging, over temperature and external short-circuit. This can be implemented by using two low voltage FETs, which are controlled by the battery analog front end or the fuel gauge/ MCU.
Products
N-channel MOSFETs
CSD18511Q5A—40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 2.3 mOhm
CSD18534Q5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm
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