BQ2970 Datasheet, PDF (22/31 Pages) Texas Instruments – Cost-Effective Voltage and Current Protection Integrated Circuit

bq2970, bq2971, bq2972, bq2973
SLUSBU9C – MARCH 2014 – REVISED MARCH 2016
10.2.3 Application Performance Plots
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Orange Line (Channel 1) = Power Up Ramp on BAT Pin
Turquoise Line (Channel 2) = DOUT Gate Drive Output
DOUT goes from low to high when UVP Recovery = UVP Set
Threshold +100 mV
Figure 27. UVP Recovery
Orange Line (Channel 1) = Power Down Ramp on BAT Pin
Turquoise Line (Channel 2) = DOUT Date Drive Output
DOUT goes from high to low when UVP threshold = UVP set
Threshold + set delay time
Figure 28. UVP Set Condition
Orange Line (Channel 1) = Power Up Ramp on BAT pin
Turquoise Line (Channel 2) = DOUT Gate Drive Output
Figure 29. Initial Power Up, DOUT
Orange Line (Channel 1) = Power Up Ramp on BAT Pin
Turquoise Line (Channel 2) = COUT Gate Drive Output
Figure 30. Initial Power Up, COUT
Orange Line (Channel 1) = Power Up Ramp on BAT Pin
Turquoise Line (Channel 2) = COUT Gate Drive Output
COUT goes from high to low when OVP threshold = OVP set
Threshold + set delay time
Figure 31. OVP Set Condition
Orange Line (Channel 1) = Decrease Voltage on BAT Pin
Turquoise Line (Channel 2) = COUT Gate Drive Output
COUT goes from low to high when OVP Recovery = OVP Set
Threshold –100 mV
Figure 32. OVP Recovery Condition
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