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BQ24079 Datasheet, PDF (2/39 Pages) Texas Instruments – 1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC
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bq24072, bq24073
bq24074, bq24075, bq24079
SLUS810D – SEPTEMBER 2008 – REVISED JUNE 2009................................................................................................................................................. 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)
Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally
discharged 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, enabling the use of a smaller
adapter.
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. The charger power stage and charge current sense functions are
fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status
display, and charge termination. The input current limit and charge current are programmable using external
resistors.
ORDERING INFORMATION
PART NUMBER
(1) (2)
bq24072RGTR
bq24072RGTT
bq24073RGTR
bq24073RGTT
bq24074RGTR
bq24074RGTT
bq24075RGTR
bq24075RGTT
bq24079RGTR
bq24079RGTT
VOVP
6.6 V
6.6 V
6.6 V
6.6 V
10.5 V
10.5 V
6.6 V
6.6 V
6.6 V
6.6 V
VBAT(REG)
4.2V
4.2V
4.2V
4.2V
4.2V
4.2V
4.2V
4.2V
4.1V
4.1V
VOUT(REG)
VBAT + 225 mV
VBAT + 225 mV
4.4 V
4.4 V
4.4 V
4.4 V
5.5 V
5.5 V
5.5 V
5.5 V
VDPPM
VO(REG) – 100 mV
VO(REG) – 100 mV
VO(REG) – 100 mV
VO(REG) – 100 mV
VO(REG) – 100 mV
VO(REG) – 100 mV
4.3 V
4.3 V
4.3 V
4.3 V
OPTIONAL
FUNCTION
TD
TD
TD
TD
ITERM
ITERM
SYSOFF
SYSOFF
SYSOFF
SYSOFF
MARKING
CKP
CKP
CKQ
CKQ
BZF
BZF
CDU
CDU
ODI
ODI
(1) The RGT package is available in the following options:
R - taped and reeled in quantities of 3,000 devices per reel.
T - taped and reeled in quantities of 250 devices per reel.
(2) This product is RoHS compatible, including a lead concentration that does not exceed 0.1% of total product weight, and is suitable for
use in specified lead-free soldering processes. In addition, this product uses package materials that do not contain halogens, including
bromine (Br) or antimony (Sb) above 0.1% of total product weight.
2
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