BQ2970 Datasheet, PDF (8/31 Pages) Texas Instruments – Cost-Effective Voltage and Current Protection Integrated Circuit

bq2970, bq2971, bq2972, bq2973
SLUSBU9C – MARCH 2014 – REVISED MARCH 2016
Typical Characteristics (continued)
1.34
1.32
1.30
1.28
1.26
1.24
1.22
1.20
1.18
±40 ±20 0
20 40 60 80
Temperature (ƒC)
F_OSC, Setting = 1.255 kHz
100
120
C003
Figure 3. Internal Oscillator Frequency Versus Temperature
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
±40 ±20 0
20 40 60
Temperature (ƒC)
80 100 120
C005
Figure 5. 0-V Charging Disallowed Versus Temperature
1350
1300
1250
1200
1150
1100
±40
±20 0 20 40 60
Temperature (ƒC)
t_OVPD, Setting = 1.25 s
80 100 120
C007
Figure 7. OVP Detection Dely Time Versus Temperature
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±1.32
±1.34
±1.36
±1.38
±1.40
±1.42
±1.44
±1.46
±40
±20 0 20 40 60
Temperature (ƒC)
V_BAT, Setting = 0 V
80 100 120
C004
Figure 4. 0-V Charging Allowed Versus Temperature
4
2
0
±2
±4
±6
±8
±10
±12
±40
±20 0 20 40 60
Temperature (ƒC)
OVP, Setting = 4.275 V
80 100 120
C006
Figure 6. OVP Detection Accuracy Versus Temperature
0
±2
±4
±6
±8
±10
±12
±40
±20 0 20 40 60
Temperature (ƒC)
UVP, Setting = 2.800 V
80 100 120
C008
Figure 8. UVP Detection Accuracy Versus Temperature
8
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