Battery pack with protection & gauge

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 AFE.

Products

N-channel MOSFETs

CSD18514Q5A—40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.9 mOhm

CSD13381F4—12-V, N channel NexFET™ power MOSFET, single LGA 1 mm x 0.6mm, 180 mOhm, gate ESD protection

CSD19536KTT—100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm

Battery protectors

BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer

BQ7718—Family 2-5S Overvoltage Protector with Internal Delay Timer

BQ77915—3-series to 5-series stackable ultra-low-power primary protector with autonomous cell balancing

BQ2947—Lithium-ion protection for accurate cell-by-cell voltage monitoring

BQ76200—High-side n-channel FET driver

Auxiliary power supply

The auxiliary power supply sub-system in battery pack consists of LDO for powering the various sub-systems present inside the battery pack.

Products

Linear & low-dropout (LDO) regulators

TLV709—150-mA 30-V low-dropout (LDO) linear regulator with 3.2-μA supply current

TPS7B83-Q1—Automotive 150-mA, 40-V, low-dropout (LDO) linear regulator with fast transient response

TPS709—150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

TPS7B82-Q1—Automotive 300-mA, off-battery (40-V), ultra-low-IQ LDO with enable in AEC-Q100 Grade-0 and Grade-1

Buck converters (integrated switch)

LM5164—6-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ

TPS629206—3-V to 17-V, 0.6-A, low-IQ, synchronous buck converter in SOT-583 package

Monitoring/protection/cell-balancing

This sub-system is responsible for monitoring and protecting the battery pack. The data that is monitored includes individual cell voltages and pack temperature. It also implements active/passive cell balancing of each battery cell inside the battery pack.

Products

Battery protectors

BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer

BQ7718—Family 2-5S Overvoltage Protector with Internal Delay Timer

BQ77915—3-series to 5-series stackable ultra-low-power primary protector with autonomous cell balancing

BQ2947—Lithium-ion protection for accurate cell-by-cell voltage monitoring

BQ76200—High-side n-channel FET driver

Analog current-sense amplifiers

INA181-Q1—AEC-Q100, 26V, bi-directional, 350kHz current sense amplifier

General-purpose op amps

LM358B—Dual, 36-V, 1.2-MHz, 3-mV offset voltage operational amplifier with -40°C to 85°C operation

LM2902B—Quad 36-V 1.2-MHz operational amplifier

LM324B—Quad, 36-V, 1.2-MHz 3-mV offset voltage operational amplifier

Battery management control unit

The Battery Management controller subsystem implements the State of Charge (SoC) and State of Health (SoH) monitoring of the battery pack for status monitoring and indication purposes.It also consist of a MCU, which can communicate and configure the battery analog front end.Additionally, it also implements an externally exposed communication interface outside of the battery-pack for status monitoring and indication purposes.

Products

Battery fuel gauges

BQ40Z80—2-s to 6-s battery pack manager with Impedance Track™ gas gauging

BQ27Z561-R2—Impedance track battery gas gauge solution for 1-series cell li-ion battery packs

BQ34Z100-R2—Multichemistry Impedance Track™ stand-alone fuel gauge

BQ40Z50-R2—1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0

BQ28Z620— Battery fuel gauge with integrated protector for 1-series to 2 series packs with 1.2-V I/O

BQ78350-R1A—CEDV li-ion gas gauge and battery management controller

MSP430 microcontrollers

MSP430G2553—16 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer

MSP430G2955—16 MHz MCU with 56KB Flash, 2KB SRAM, 10-bit ADC, comparator, UART/SPI/I2C, timer

MSP430FR2155—24 MHz MCU with 32KB FRAM, 4KB SRAM, comparator, 12-bit ADC, UART/SPI/I2C, timer

ESD protection diodes

TPD2E007—Dual 10-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

TPD1E10B06—12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package