BQ76922 Series

Three-series to five-series cell lithium-ion and lithium-phosphate battery monitor

Link to Manufacturer Page: https://www.ti.com/

Catalog

Three-series to five-series cell lithium-ion and lithium-phosphate battery monitor

Part
Texas Instruments BQ76922RSNR

Key Features

• Battery monitoring capability for 3-series to 5-series cellsIntegrated charge pump for high-side NFET protection with optional autonomous recoveryExtensive protection suite including voltage, temperature, current, and internal diagnosticsTwo independent ADCsSupport for simultaneous current and voltage samplingHigh-accuracy coulomb counter with input offset error < 1µV (typical)High accuracy cell voltage measurement < 10mV (typical)Wide-range current applications (±200mV measurement range across sense resistor)Integrated secondary chemical fuse drive protectionAutonomous or host-controlled cell balancingMultiple power modes (typical battery pack operating range conditions)NORMAL mode: 286µAMultiple SLEEP mode options: 24µA to 41µAMultiple DEEPSLEEP mode options: 9µA to 10µASHUTDOWN mode: 1µAHigh-voltage tolerance of 60V on cell connect and select additional pinsTolerant of random cell attach sequence on production lineSupport for temperature sensing using internal sensor and up to five external thermistorsIntegrated one-time-programmable (OTP) memory programmable by customers on production lineCommunication options include 400kHz I2C, and HDQ one-wire interfaceProgrammable LDO for external system usage32-pin QFN package (RSN)Battery monitoring capability for 3-series to 5-series cellsIntegrated charge pump for high-side NFET protection with optional autonomous recoveryExtensive protection suite including voltage, temperature, current, and internal diagnosticsTwo independent ADCsSupport for simultaneous current and voltage samplingHigh-accuracy coulomb counter with input offset error < 1µV (typical)High accuracy cell voltage measurement < 10mV (typical)Wide-range current applications (±200mV measurement range across sense resistor)Integrated secondary chemical fuse drive protectionAutonomous or host-controlled cell balancingMultiple power modes (typical battery pack operating range conditions)NORMAL mode: 286µAMultiple SLEEP mode options: 24µA to 41µAMultiple DEEPSLEEP mode options: 9µA to 10µASHUTDOWN mode: 1µAHigh-voltage tolerance of 60V on cell connect and select additional pinsTolerant of random cell attach sequence on production lineSupport for temperature sensing using internal sensor and up to five external thermistorsIntegrated one-time-programmable (OTP) memory programmable by customers on production lineCommunication options include 400kHz I2C, and HDQ one-wire interfaceProgrammable LDO for external system usage32-pin QFN package (RSN)

Description

The Texas Instruments BQ76922 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 5-series Li-ion, Li-polymer, and LiFePO4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host controlled cell balancing. Integration includes high-side charge-pump NFET drivers, a programmable LDO for external system use, and a host communication peripheral supporting 400kHz I2C and HDQ one-wire standards. The BQ76922 device is available in a 32-pin 4 × 4 mm QFN package. The Texas Instruments BQ76922 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 5-series Li-ion, Li-polymer, and LiFePO4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host controlled cell balancing. Integration includes high-side charge-pump NFET drivers, a programmable LDO for external system use, and a host communication peripheral supporting 400kHz I2C and HDQ one-wire standards. The BQ76922 device is available in a 32-pin 4 × 4 mm QFN package.