BQ27427 Series

Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor

Catalog

Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor

Part	Supplier Device Package	Function	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Fault Protection	Package / Case	Interface	Battery Chemistry	Number of Cells
Texas Instruments BQ27427YZFR	9-DSBGA	Fuel Gauge	Surface Mount	85 °C	-40 °C	Under Voltage	9-UFBGA DSBGA	I2C	Lithium Ion	1

Catalog

Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor

Key Features

• Single-cell Li-ion battery fuel gaugeResides on system boardSupports embedded or removable batteriesPowers directly from the battery with integrated LDOIntegrates low-value sense resistor (7 mΩ)Ultra low power consumption in NORMAL (50 µA) and SLEEP (9 µA) modesBattery fuel gauging based on patented Impedance Track™ technologyProvides three selectable preprogrammed profiles for 4.2-V, 4.35-V, and 4.4-V cellsReports remaining capacity and state-of-charge (SOC) with smoothing filterAdjusts automatically for battery aging, self-discharge, temperature, and rate changesEstimates battery state-of-health (aging)Microcontroller peripheral interface supports:400-kHz I 2C serial interfaceConfigurable SOC interrupt or battery low digital output warningInternal temperature sensor or host reported temperature or external thermistorSingle-cell Li-ion battery fuel gaugeResides on system boardSupports embedded or removable batteriesPowers directly from the battery with integrated LDOIntegrates low-value sense resistor (7 mΩ)Ultra low power consumption in NORMAL (50 µA) and SLEEP (9 µA) modesBattery fuel gauging based on patented Impedance Track™ technologyProvides three selectable preprogrammed profiles for 4.2-V, 4.35-V, and 4.4-V cellsReports remaining capacity and state-of-charge (SOC) with smoothing filterAdjusts automatically for battery aging, self-discharge, temperature, and rate changesEstimates battery state-of-health (aging)Microcontroller peripheral interface supports:400-kHz I 2C serial interfaceConfigurable SOC interrupt or battery low digital output warningInternal temperature sensor or host reported temperature or external thermistor

Description

The Texas Instruments BQ27427 battery fuel gauge is a single-cell gauge that requires minimal user-configuration and system microcontroller firmware development, leading to quick system bring-up. Three chemistry profiles are preprogrammed to enable minimal user-configuration, and to help manage customer inventory across projects with different battery chemistries. The BQ27427 battery fuel gauge has very low sleep power consumption leading to longer battery run time. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported with an external thermistor. The BQ27427 battery fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV). Battery fuel gauging with the BQ27427 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 9-ball, 1.62 mm × 1.58 mm, 0.5 mm pitch NanoFree™ chip scale package (DSBGA) is ideal for space-constrained applications. The Texas Instruments BQ27427 battery fuel gauge is a single-cell gauge that requires minimal user-configuration and system microcontroller firmware development, leading to quick system bring-up. Three chemistry profiles are preprogrammed to enable minimal user-configuration, and to help manage customer inventory across projects with different battery chemistries. The BQ27427 battery fuel gauge has very low sleep power consumption leading to longer battery run time. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported with an external thermistor. The BQ27427 battery fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV). Battery fuel gauging with the BQ27427 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 9-ball, 1.62 mm × 1.58 mm, 0.5 mm pitch NanoFree™ chip scale package (DSBGA) is ideal for space-constrained applications.