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| BQ24315 Datasheet, PDF (7/20 Pages) Texas Instruments – OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC | |||
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www.ti.com
TYPICAL OPERATING PERFORMANCE (continued)
bq24315
SLUS817 â MARCH 2008
OCP, ZOOM-IN ON THE FIRST CYCLE OF FIGURE 7
ROUT SWITCHES FROM 6.6⦠TO 3.3â¦,SHOWS CURRENT
LIMITING AND SOFT-STOP
2 V/div
VIN
500 mA/div
IIN
1 V/div
VOUT
t - Time - 2 ms/div
Figure 8.
BAT-OVP, V(VBAT) STEPS FROM 4 V TO 4.5 V,SHOWS
tDGL(BAT-OVP) AND SOFT STOP
2 V/div
VOUT
VOUT
2 V/div
IIN
500 mA/div
VFAULT
1 V/div
t - Time - 40 ms/div
Figure 9.
BAT-OVP, V(VBAT) CYCLES BETWEEN 4 V AND 4.5
V,SHOWS BAT-OVP COUNTER
2 V/div
VOUT
1 V/div
VBAT
2 V/div
VBAT
1 V/div
VFAULT
200 mA/div
VFAULT
t - Time - 100 ms/div
Figure 10.
UNDERVOLTAGE LOCKOUT
vs
FREE-AIR TEMPERATURE
2.75
2.7
2.65
VIN Increasing
2.6
2.55
2.5
2.45
VIN Decreasing
2.4
-50 -30 -10 10 30 50 70
Temperature - °C
Figure 12.
90 110 130
280
260
240
220
200
180
160
140
120
100
0
t - Time - 4 ms/div
Figure 11.
DROPOUT VOLTAGE (IN to OUT)
vs
FREE-AIR TEMPERATURE
VIN = 4 V
VIN = 5 V
50
100
150
Temperature - °C
Figure 13.
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): bq24315
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