Datasheet
bq24165
bq24166
bq24167
SLUSAP4B –DECEMBER 2011–REVISED MARCH 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION (CONTINUED)
The power path management feature allows the bq24165/166/167 to power the system from a high efficiency DC
to DC converter while simultaneously and independently charging the battery. The charger monitors the battery
current at all times and reduces the charge current when the system load requires current above the input
current limit. This allows for proper charge termination and timer operation. The system voltage is regulated to
the battery voltage but will not drop below 3.5V. This minimum system voltage support enables the system to run
with a defective or absent battery pack and enables instant system turn-on even with a totally discharged battery
or no battery. The power-path management architecture also permits the battery to supplement the system
current requirements when the adapter cannot deliver the peak system currents. This enables the use of a
smaller adapter. The 2.5A input current capability allows for GSM phone calls as soon as the adapter is plugged
in regardless of the battery voltage.
The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases,
an internal control loop monitors the IC junction temperature and reduces the charge current if the internal
temperature threshold is exceeded. Additionally, the bq24166 and bq24167 offer a voltage-based battery pack
thermistor monitoring input (TS) that monitors battery temperature for safe charging. The TS function for
bq24166 is JEITA compatible.
ORDERING INFORMATION
PART NUMBER USB OVP IN OVP NTC MONITORING (TS) JEITA COMPATIBLE Package
bq24165YFFR 6.5V 10.5 V No Yes WCSP
bq24165YFFT 6.5 V 10.5 V No Yes WCSP
bq24165RGER 6.5V 10.5 V No Yes QFN
bq24165RGET 6.5 V 10.5 V No Yes QFN
bq24166YFFR 6.5 V 10.5 V Yes No WCSP
bq24166YFFT 6.5 V 10.5 V Yes No WCSP
bq24166RGER 6.5 V 10.5 V Yes No QFN
bq24166RGET 6.5 V 10.5 V Yes No QFN
bq24167YFFR 6.5 V 10.5 V Yes Yes WCSP
bq24167YFFT 6.5 V 10.5 V Yes Yes WCSP
bq24167RGER 6.5 V 10.5 V Yes Yes QFN
bq24167RGET 6.5 V 10.5 V Yes Yes QFN
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Product Folder Links: bq24165 bq24166 bq24167