Battery pack with protection, gauge & external communication

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

CSD19505KCS—80-V, N channel NexFET™ power MOSFET, single TO-220, 3.1 mOhm

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

Battery protectors

BQ77207—3-series to 7-series cell Li-ion battery, internal delay timer, voltage and temperature protector

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

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

BQ76200—High-side n-channel FET driver

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

Low-side drivers

UCC27614—10-A/10-A single-channel gate driver with 4-V UVLO, 30-V VDD and low prop delay

UCC27524—5-A/5-A dual-channel gate driver with 5-V UVLO, enable, and 1-ns delay Matching

UCC27424—4-A/4-A dual-channel gate driver with enable and 5-V IN handling

UCC27517—4-A/4-A single-channel gate driver with 5-V UVLO and 13-ns prop delay in SOT-23 package

UCC27624—5-A/5-A dual-channel gate driver with 4-V UVLO, 30-V VDD and low prop delay

Auxiliary power supply

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

Products

Buck converters (integrated switch)

LM5013—6-V to 100-V input, 3.5-A non-synchronous buck DC/DC converter with ultra-low quiescent current (IQ)

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

LM5163—100-V input, 0.5-A synchronous buck DC/DC converter with ultra-low IQ

Linear & low-dropout (LDO) regulators

TPS7A43—50-mA, 85-V, ultra-low IQ, dual low-dropout voltage regulator with power good and precision enable

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

TLV703—300-mA, high-PSRR, low-IQ, low-dropout voltage regulator

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 monitors & balancers

BQ79718-Q1—Automotive 18-s precise battery monitor, balancer and integrated protector compliant to ASIL-D

BQ76942—3-series to 10-series multicell battery monitor and protector

BQ76952—3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4

BQ79616-Q1—16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance

Battery protectors

BQ77207—3-series to 7-series cell Li-ion battery, internal delay timer, voltage and temperature protector

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

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

BQ76200—High-side n-channel FET driver

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

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

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

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

MSP430 microcontrollers

MSP430F5529—25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

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

Analog switches & muxes

SN74LV4051A-Q1—Automotive 5-V, 8:1, 1-channel general-purpose analog multiplexer

TS3A44159—0.4-Ω on-state resistance, 3.3-V, 2:1 (SPDT), 4-channel analog switch

TMUX4051—±12-V, 8:1, one-channel multiplexer with 1.8-V compatible logic

D-type flip-flops

SN74LVC1G175—Single D-Type Flip-Flop with Asynchronous Clear

Noninverting buffers & drivers

SN74LVC2G17—2-ch, 1.65-V to 5.5-V buffers with Schmitt-Trigger inputs

CD74HC4050—6-ch, 2-V to 6-V buffers