BQ24072 Datasheet, PDF (9/38 Pages) Texas Instruments – 1.2A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

bq24072, bq24073
bq24074, bq24075
www.ti.com...................................................................................................................................... SLUS810A – SEPTEMBER 2008 – REVISED DECEMBER 2008
TYPICAL CHARACTERISTICS
V_IN = 6V, EN1=1, EN2=0, bq24073 application circuit, T_A = 25°C, unless otherwise noted.
V_IN
V_OUT
4.4 V
V_BAT
3.6 V
V_PGOOD
ADAPTER PLUG-IN
BATTERY CONNECTED
R_LOAD = 10Ω
5 V/div
V_CHG
500 mV/div
I_BAT
5 V/div
BATTERY DETECTION
BATTERY INSERTED
Charging Initiated
5 V/div ^VCHG
1 A/div
I_BAT
BATTERY DETECTION
BATTERY REMOVED
5 V/div
1 A/div
I_BAT
500 mA/div V_BAT
2 V/div
Battery Inserted
V_BAT
Battery
Removed
2 V/div
4 ms/div
Battery Detection Mode
Battery Detection Mode
400 ms/div
400 ms/div
Figure 1.
Figure 2.
Figure 3.
ENTERING AND EXITING DPPM
MODE
R_LOAD = 20Ω to 9Ω
ENTERING AND EXITING BATTERY
SUPPLEMENT MODE
R_LOAD = 25ΩTO 4.5Ω
bq24074
ENTERING AND EXITING BATTERY
SUPPLEMENT MODE
R_LOAD = 20ΩTO 4.5Ω
bq24072
I_OUT
I_BAT
V_OUT
4.4 V
400 ms/div
Figure 4.
500 mA/div _IOUT
I_BAT
500 mA/div
200 mV/div _VOUT
4.4 V
V_BAT
3.8 V
V_CE
V_CHG
V_BAT
3.6 V
CHARGER ON/OF USING CE
5 V/div
5 V/div
1 V/div
V_IN
V_OUT
4.4 V
V_BAT
4.2 V
Mandatory Precharge
I_BAT
500 mA/div _IBAT
10 ms/div
Figure 7.
Supplement Mode
1 ms/div
Figure 5.
OVP FAULT
V_IN = 6V to 15V
R_LOAD = 10Ω
1 A/div
I_OUT
500 mA/div
I_BAT
Supplement Mode
1 A/div
500 mA/div
V_OUT
3.825 V
500 mV/div
V_BAT
3.6 V
Tracking to V_BAT +225 mV
1 ms/div
Figure 6.
200 mV/div
SYSTEM ON/OFF WITH INPUT
CONNECTED
V_IN = 6V
bq24075
10 V/div ^VSYSOFF
5 V/div
40 ms/div
Figure 8.
500 mV/div
V_OUT
5.5 V
V_BAT
4V
1 A/div
I_BAT
2 V/div
400 ms/div
Figure 9.
500 mA/div
Copyright © 2008, Texas Instruments Incorporated
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