BQ25040 Datasheet, PDF (9/25 Pages) Texas Instruments – 1.1A, Single-Input, Single Cell Li-Ion Battery Charger With 50mA LDO and 2.3A Production Test Support

bq25040
www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009
TYPICAL CHARACTERISTICS (continued)
USB500 Mode, Circuit of Figure 2, T_A = 25°C
UB500 to PTM Transition
Using EN/SET
R_OUT=8.4Ω, No battery connected
R_OUT = 8.4 W
V_EN/SET
5 V/div
LDO Load Transient
R_LDO = 1kΩ to 100Ω
V_OUT
I_OUT
USB500
1 V/div
PTM
200 mA/div
V_LDO
I_LDO
100 mV/div
50 mA/div
1 ms/div
Figure 9.
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
0
Complete Charge Cycle
0.81
Battery Voltage
0.72
CHG
0.63
Voltage
0.54
0.45
Battery Current
0.36
0.27
0.18
R_ISET = 1.18 kW,
R_IFULL = 4.02 kW
0.09
0
50 100 150 200 250 300 350 400 450
t - Time - min
Figure 11.
125
100
75
50
25
0
25
Thermal Regulation
50
75
100
125
150
T_A - Free-Air Temperature - °C
Figure 13.
V_IN = 5 V to 10 V
40 ms/div
Figure 10.
OVP Fault
V_IN = 5V to 12V
V_LDO
5 V/div
2 V/div
V_IN
I_OUT
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
500 mA/div
100 ms/div
Figure 12.
Dropout Voltage
vs
Temperature
2 V/div
I_LOAD = 1.8 A
I_LOAD = 1 A
25
50
75
100
125
T_A - Free-Air Temperature - °C
Figure 14.
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