BQ24160A_15 Datasheet, PDF (34/52 Pages) Texas Instruments – bq2416xx 2.5A, Dual-Input, Single-Cell Switched-Mode Li-Ion Battery Charger with Power Path Management and I2C Interface

bq24160, bq24160A, bq24161
bq24161B, bq24163, bq24168
SLUSAO0F – NOVEMBER 2011 – REVISED JULY 2014
www.ti.com
10 Application and Implementation
10.1 Application Information
A typical application circuit using the bq24160 with a smartphone's GSM power amplifier (PA) powered directly
from the battery is shown in Figure 21. A typical application circuit using the bq24161 with a smartphone's GSM
PA powered from the SYS rail, to allow for calls even with a deeply discharged battery, is shown in Figure 22.
Each circuit shows the minimum capacitance requirements for each pin and typical recommended inductance
value of 1.5 µH. The TS resistor divider for configuring the TS function for the battery's specific thermistor can be
computed from equations Equation 1 and Equation 2. The resistor on STAT is sized per the LED current
requirements. All other configuration settings for VINDPM, input current limit, charge current and charge voltage
are made in EEPROM registers using I2C commands. Options for sizing the inductor outside the 1.5 µH
recommended value and additional SYS pin capacitance are explained in the next section.
10.2 Typical Application
ADAPTER
VBUS
D+
D-
GND
1 mF 4.7 mF
1 mF 4.7 mF
1 mF
IN
PMIDI
USB
PMIDU
DRV
SW
BOOT
SYS
PGND
BGATE
BAT
STAT
TS
D+
D-
bq24160
INT
SDA
SCL
1.5 mH
0.01 mF
10 mF
VDRV
1 mF
TEMP
PACK+
PACK-
System
Load
VSYS
(1.8V)
GSM
PA
HOST
GPIO1
SDA
SCL
Figure 21. bq24160, Shown with no External Discharge FET, PA Connected to Battery
34
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