BQ24160 Datasheet, PDF (15/44 Pages) Texas Instruments – 2.5A, Dual-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path

bq24160, bq24161
bq24163, bq24168
www.ti.com
SLUSAO0A – NOVEMBER 2011 – REVISED MARCH 2012
TYPICAL CHARACTERISTICS (continued)
0.055
I_BATSHRT vs. Battery Voltage
0.054
0.053
0.052
0.051
0.05
0
0.5
1
1.5
2
2.5
3
Battery Voltage (V)
G009
Figure 21.
DETAILED DESCRIPTION
The bq24160/bq24161/bq24163/bq24168 are highly integrated single cell Li-Ion battery chargers and system
power path management devices targeted for space-limited, portable applications with high capacity batteries.
The dual-input, single-cell charger operates from either a USB port or alternate power source (i.e. wall adapter or
wireless power input) for a versatile solution.
The power path management feature allows the bq2416x 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 proper charge termination and enables the system to run with a defective or absent battery pack.
Additionally, this 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 2.5 A current
capability allows for GSM phone calls as soon as the adapter is plugged in regardless of the battery voltage. The
charge parameters are programmable using the I²C interface.
Copyright © 2011–2012, Texas Instruments Incorporated
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