Battery pack with protection only

Protection/cell-balancing

This sub-system is responsible for protecting the battery pack. The data that is monitored includes individual cell voltage and pack temperature. It also implements 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 protectors

BQ77205—Ultra-low-power voltage protector for 3-series to 5-series cell Li-ion battery

BQ76200—High-side n-channel FET driver

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

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

Linear & low-dropout (LDO) regulators

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

TLV761—1-A 16-V high-PSRR linear voltage regulator

TPS709-Q1—Automotive 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection

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

Shunt voltage references

TL431—Adjustable precision shunt regulator

Comparators

LM393B—Dual commercial grade standard comparator

LM2903—Dual differential comparator

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 protector.

Products

N-channel MOSFETs

CSD18534Q5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm