BQ24072T_1 Datasheet, PDF (10/34 Pages) Texas Instruments – 1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC

bq24072T
bq24075T, bq24079T
SLUS937A – DECEMBER 2009 – REVISED APRIL 2010
www.ti.com
TYPICAL CHARACTERISTICS
V_IN = 6V, EN1 = 1, EN2 = 0, T_A = 25°C, unless otherwise noted.
ADAPTER PLUG-IN
BATTERY CONNECTED
R_LOAD = 10Ω
BATTERY DETECTION
BATTERY INSERTED
BATTERY DETECTION
BATTERY REMOVED
V_IN
V_BAT
3.6 V
V_PGOOD
5 V/div
V_CHG
500 mV/div
I_BAT
5 V/div
Charging Initiated
5 V/div ^VCHG
1 A/div
I_BAT
5 V/div
1 A/div
I_BAT
500 mA/div _VBAT
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
I_LOAD = 25 mA TO 250 mA,
I_CHARGE = 300 mA
ENTERING AND EXITING BATTERY
SUPPLEMENT MODE
I_LOAD = 25mA TO 750mA
bq24075T, bq24079T
ENTERING AND EXITING BATTERY
SUPPLEMENT MODE
R_LOAD = 20Ω TO 4.5Ω
bq24072T
I_OUT
V_OUT
5.5 V
I_BAT
2 ms/div
Figure 4.
200 mA/div
I_OUT
500 mV/div ^IBAT
200 mA/div I_OUT
5.5 V
V_BAT
4.1 V
Supplement Mode
2 ms/div
Figure 5.
500 mA/div
I_OUT
I_BAT
500 mA/div
Supplement Mode
500 mV/div
V_OUT
3.825 V
V_BAT
3.6 V
Tracking to V_BAT +225 mV
1 ms/div
Figure 6.
1 A/div
500 mA/div
200 mV/div
CHARGER ON/OFF USING CE
V_CE
V_CHG
V_BAT
3.6 V
5 V/div
5 V/div
1 V/div
V_IN
V_OUT
4.3 V
V_BAT
4.2 V
Mandatory Precharge
I_BAT
500 mA/div
I_BAT
10 ms/div
Figure 7.
OVP FAULT
V_IN = 5.5V TO 8.5V
SYSTEM ON/OFF WITH INPUT
CONNECTED
V_IN = 6V
2 V/div
V_SYSOFF
5 V/div
40 ms/div
Figure 8.
200 mV/div
V_OUT
5.5 V
V_BAT
4V
500 mA/div
I_BAT
400 ms/div
Figure 9.
2 V/div
500 mA/div
10
Submit Documentation Feedback
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24072T bq24075T bq24079T