BQ24230 Datasheet, PDF (8/33 Pages) Texas Instruments – USB-FRIENDLY LITHIUM-ION BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

bq24230
bq24232
SLUS821A – OCTOBER 2008 – REVISED DECEMBER 2008 .......................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS
Typical Application Circuit, EN1=0, EN2=1, T_A=25°C, unless otherwise noted.
ADAPTER PLUG-IN WITH BATTERY
CONNECTED
R_LOAD = 25Ω
BATTERY DETECTION -- INSERTION
BATTERY DETECTION -- REMOVAL
V_IN
5 V/div
V_CHG
V_OUT
4.4 V
V_BAT
4V
V_PGOOD
I_BAT
Battery Supplying Load
Mandatory Precharge
Fastcharge
1 V/div
V_BAT
200 mA/div
Battery Detection Mode
I_BAT
Charging Initiated
Battery Inserted
4 ms/div
Figure 1.
400 ms/div
Figure 2.
5 V/div
V_CHG
2 V/div
2 V/div
V_BAT
Battery Removed
100 mA/div _IBAT
200 mA/div
Battery Detection Mode
2 V/div
400 ms/div
Figure 3.
ENTERING AND EXITING DPPM
MODE
R_LOAD = 25Ω to 9Ω
ENTERING AND EXITING BATTERY
SUPPLEMENT MODE
R_LOAD = 25Ω to 4.5Ω
CHARGER ON/OFF USING CE
I_LOAD
I_BAT
V_OUT
4.4 V
V_IN
I_BAT
V_OUT
4.4 V
V_BAT
4.2 V
400 ms/div
Figure 4.
OVP FAULT
V_IN = 6V to 15V
R_LOAD = 25Ω
40 ms/div
Figure 7.
500 mA/div
I_LOAD
500 mA/div V_CE
5 V/div
I_BAT
200 mA/div
V_OUT
4.4 V
200 mV/div
V_BAT
3.9 V
250
10 V/div
200
150
200 mA/div
100
200 mV/div
50
Supplement Mode
V_CHG
500 mA/div
V_BAT
3.6V
200 mV/div
I_BAT
Mandatory Precharge
5 V/div
500 mV/div
100 mA/div
2 ms/div
Figure 5.
THERMAL REGULATION
10 ms/div
Figure 6.
DROPOUT VOLTAGE
vs
TEMPERATURE
0.35
I_L = 500 mA
0.30
0.25
0.20
0.15
0.10
0.05
0
120 125 130 135 140 145
T_A - Free-Air Temperature - °C
Figure 8.
0
0
25
50
75
100 125
T_J - Junction Temperature - °C
Figure 9.
8
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