BQ24297 Datasheet, PDF (14/48 Pages) Texas Instruments – I2C Controlled 3A Single Cell USB Charger

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SLUSBP6A – SEPTEMBER 2013 – REVISED OCTOBER 2013
CHARGE EFFICIENCY
vs
CHARGE CURRENT
95
90
85
80
75
70
VBUS = 5V
65
0
0.5
1
1.5
2
2.5
3
3.5
Charge Current (A)
Figure 4.
100
95
90
85
80
75
70
65
60
0
BOOST MODE EFFICIENCY
vs
VBUS LOAD CURRENT
VBAT = 3.2V
VBAT = 3.5V
VBAT = 3.8V
0.5
1
1.5
VBUS Load Current (A)
Figure 6.
BOOST MODE VBUS VOLTAGE REGULATION
(Typical Output = 4.998V ; REG06[7:4]=0111)
vs
VBUS LOAD CURRENT
5.1
5
4.9
4.8
4.7
4.6
4.5
0
VBAT = 3.2V
VBAT = 3.5V
VBAT = 3.8V
0.5
1
1.5
VBUS Load Current (A)
Figure 8.
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SYSTEM EFFICIENCY
vs
SYSTEM LOAD CURRENT
95
90
85
80
75
70
0
4
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
0
VBUS = 5V
0.5
1
1.5
2
2.5
3
Load Current (A)
Figure 5.
SYS VOLTAGE REGULATION
vs
SYSTEM LOAD CURRENT
SYSMIN = 3.5
SYSMIN = 3.2
SYSMIN = 3.7
0.5
1
1.5
2
2.5
3
3.5
System Load Current (A)
Figure 7.
SYS VOLTAGE
vs
TEMPERATURE
3.7
3.65
3.6
3.55
SYSMIN = 3.5V
3.5
-50 -25 0 25 50 75 100 125 150
Temperature (^oC)
Figure 9.
14
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