BQ24314A Datasheet, PDF (8/21 Pages) Texas Instruments – OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC

bq24314A
SLUS811 – MARCH 2008
TYPICAL OPERATING PERFORMANCE (continued)
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UNDERVOLTAGE LOCKOUT
vs
FREE-AIR TEMPERATURE
2.75
2.7
2.65
V_IN Increasing
2.6
2.55
2.5
2.45
V_IN Decreasing
2.4
-50 -30 -10 10 30 50 70
Temperature - °C
Figure 12.
90 110 130
OVERVOLTAGE THRESHOLD PROTECTION
vs
FREE-AIR TEMPERATURE
5.88
5.86
5.84
5.82
V_IN Increasing
5.8
V_IN Decreasing
5.78
-50 -30 -10 10
30 50
70 90 ₁₁₀ 130
Temperature - °C
Figure 14.
INPUT OVERCURRENT PROTECTION
vs
FREE-AIR TEMPERATURE
985
984
983
982
981
980
979
978
977
976
975
-50 -30 -10
10 30 50 70
Temperature - °C
Figure 16.
90 110 130
280
260
240
220
200
180
160
140
120
100
0
1600
1400
1200
DROPOUT VOLTAGE (IN to OUT)
vs
FREE-AIR TEMPERATURE
V_IN = 4 V
V_IN = 5 V
50
100
150
Temperature - °C
Figure 13.
INPUT OVERCURRENT PROTECTION
vs
ILIM RESISTANCE
1000
800
600
400
200
0
0 10 20 30 40 50 60 70 80 90 100
R_ILIM - kW
Figure 15.
BATTERY OVERVOLTAGE PROTECTION
vs
FREE-AIR TEMPERATURE
4.4
4.35
4.3
BV_OVP (V_VBAT Increasing)
4.25
4.2
4.15
4.1
Bat-OVP Recovery (V_VBAT Decreasing)
4.05
-50 -30 -10 10 30 50 70
Temperature - °C
Figure 17.
90 110 130
8
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