BQ24721 Datasheet, PDF (12/48 Pages) Texas Instruments – ADVANCED MULTI-CHEMISTRY AND MULTI-CELL SYNCHRONOUS SWITCH-MODE CHARGER AND SYSTEM POWER SELECTOR

bq24721
SLUS683 – NOVEMBER 2005
TYPICAL CHARACTERISTICS (continued)
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INPUT CURRENT REGULATION
(DPM) ACCURACY
vs
ACP-ACN VOLATGE
13
V_I = 20 V
11
9
T_J = 125^oC
7
5
T_J = 85^oC
3
T_J = 25^oC
T_J = 0^oC
1
-1
5 9 13 17 21 25 29 33 37 41
V_I − ACP-ACN Voltage − mV
Figure 19.
I_O = DPM CURRENT SENSE
AMPLIFIER OFFSET
vs
JUNCTION TEMPERATURE
1
0.9
V_I = 20 V
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
20 40 60 80 100 110 120 125
T_J − Junction Temperature − ^oC
Figure 22.
I_O = CHARGE CURRENT LIMIT
vs
JUNCTION TEMPERATURE
5.75
5.7
V_I = 20 V
5.65
5.6
5.55
5.5
5.45
5.4
0
20 40 60 80 100 110 120 125
T_J − Junction Temperature − ^oC
Figure 25.
INPUT CURRENT REGULATION
(DPM) ACCURACY
vs
INPUT VOLATGE
5
V_I = 20 V
4
5.12 mV
3
2
10.24 mV
1
0
20.48 mV
40.96 mV
-1
14
16
18
20
22
24
V_I − Voltage − mV
Figure 20.
I_O = ADAPTER OUTPUT CURRENT
LIMIT
vs
JUNCTION TEMPERATURE
6
5.95
5.9
5.85
5.8
5.75
5.7
5.65
5.6
0
20 40 60 80 100 110 120 125
T_J − Junction Temperature − ^oC
Figure 23.
300-kHz SWITCHING FREQUENCY
vs
INPUT VOLTAGE
311
T_J = 85^oC
310.5
T_J = 125^oC
310
309.5
309
T_J = 25^oC
308.5
308
14
T_J = 0^oC
16
18
20
22
24
V_I − Input Voltage − V
Figure 26.
I_O = DPM CURRENT SENSE
AMPLIFIER ACCURACY
vs
ACP-ACN VOLATGE
0.28
0.26
0.24
T_J = 0^oC
V_I = 20 V
0.22
0.2
T_J = 85^oC
0.18
0.16
0.14
T_J = 25^oC
T_J = 125^oC
0.12
0.1
0 10 20 30 40 50 60 70 80 90 100
V_I − ACP-ACN Voltage − mV
Figure 21.
I_O = CHARGE SENSE AMPLIFIER
ACCURACY
vs
SRP-SRN VOLATGE
0.2
0
-0.2
T_J = 125^oC
-0.4
T_J = 85^oC
-0.6
-0.8
T_J = 25^oC
-1
-1.2
T_J = 0^oC
V_I = 20 V
-1.4
0 10 20 30 40 50 60 70 80 90 100
V_I − SRP-SRN Voltage − mV
Figure 24.
300-kHz SWITCHING FREQUENCY
vs
JUNCTION TEMPERATURE
311
V_I = 20 V
310.5
310
309.5
309
308.5
0
20 40 60 80 100 110 120 125
T_J − Junction Temperature − ^oC
Figure 27.
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