Pre-charge/charge/discharge
The pre-charge/charge/discharge is used to provide pre-charge via and protect the battery pack from abnormalities such as over voltage, overcurrent charging/discharging, overtemperature 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
CSD18541F5—60-V, N channel NexFET™ power MOSFET, single LGA 1.5 mm x 0.8mm, 65 mOhm, gate ESD protection
CSD17573Q5B—30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 1.45 mOhm
CSD17585F5—30-V, N channel NexFET™ power MOSFET, single LGA 0.8 mm x 1.5 mm, 33 mOhm, gate ESD protection
CSD87501L—30-V, N channel NexFET™ power MOSFET, dual common drain LGA, 5.5 mOhm, gate ESD protection
CSD17579Q5A—30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 13.3 mOhm
CSD13381F4—12-V, N channel NexFET™ power MOSFET, single LGA 1 mm x 0.6mm, 180 mOhm, gate ESD protection
Battery protectors
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
BQ2962—Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion
BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer
BQ294592—Overvoltage Protection Device for 2- to 3-Cell Li-Ion Batteries, with 4.30v OVP
Protection/monitoring
The Protector/Monitor is responsible for protecting, monitoring and balancing for the battery pack. The data that is monitored includes individual cell voltage. 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
BQ79616-Q1—16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance
BQ76920—3 to 5-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)
BQ76942—3-series to 10-series multicell battery monitor and protector
BQ76930—6 to 10-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)
BQ29311—3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5
BQ76940—9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)
Battery protectors
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
BQ2962—Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion
BQ77216—Voltage and temperature protection for 3-s to 16-s cell Li-ion batteries with internal delay timer
BQ294592—Overvoltage Protection Device for 2- to 3-Cell Li-Ion Batteries, with 4.30v OVP
Battery management control unit
The Battery Management Control Unit consists of a Fuel Gauge, which can communicate and control the battery charge/discharge MOSFETs. It also implements the State of Charge (SoC) and State of Health (SoH) of the battery pack and individual battery cells. This sub-system can be configured and the battery pack SoC, SoH can be monitored. Additionally it can implement a communication interface outside of the battery-pack for status monitoring and indication purposes.
Products
Battery fuel gauges
BQ27Z746—Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector
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
Linear & low-dropout (LDO) regulators
TLV767—Adjustable- and fixed-output, 1-A, 16-V, positive-voltage low-dropout (LDO) linear regulator
TLV743P—300-mA low-IQ low-dropout (LDO) voltage regulator with enable
TPS7B81—150-mA, off-battery (40-V), ultra-low-IQ, low-dropout (LDO) voltage regulator with enable
TLV709—150-mA 30-V low-dropout (LDO) linear regulator with 3.2-μA supply current
Battery protectors
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
BQ2962—Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion
Battery authentication ICs
BQ2022A—1K-bit Serial EPROM with SDQ Interface
TVS diodes
TVS1400—14V flat-clamp surge protection device
ESD protection diodes
TPD4E1U06—Quad 0.8-pF, 5.5-V, ±15-kV ESD protection diode in SOT-23 & SC70 packages
TPD1E10B06—12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package
Previous： Electric power steering (EPS)
