BQ24314_1 Datasheet, PDF (8/25 Pages) Texas Instruments – OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC

bq24314
bq24316
SLUS763C – JULY 2007 – REVISED OCTOBER 2007
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 14.
90 110 130
OVERVOLTAGE THRESHOLD PROTECTION (bq24316)
vs
FREE-AIR TEMPERATURE
6.82
DROPOUT VOLTAGE (IN to OUT)
vs
FREE-AIR TEMPERATURE
280
260
240
V_IN = 4 V
220
200
V_IN = 5 V
180
160
140
120
100
0
50
100
150
Temperature - °C
Figure 15.
OVERVOLTAGE THRESHOLD PROTECTION (bq24314)
vs
FREE-AIR TEMPERATURE
5.88
6.8
6.78
V_IN Increasing
6.76
6.74
6.72
V_IN Decreasing
6.7
-50 -30 -10
10
30
50
70 90
Temperature - °C
110 130
Figure 16.
INPUT OVERCURRENT PROTECTION
vs
ILIM RESISTANCE
1600
1400
1200
1000
800
600
400
200
0
0
10 20 30 40 50 60 70 80 90 100
R_ILIM - kW
Figure 18.
5.86
5.84
5.82
V_IN Increasing
5.8
V_IN Decreasing
5.78
-50
-30 -10
10 30 50 70
Temperature - °C
Figure 17.
90 ₁₁₀ 130
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 19.
90 110 130
8
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