BQ2961_17 Datasheet, PDF (20/33 Pages) Texas Instruments – Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply

bq2961, bq2962
SLUSBU5D – NOVEMBER 2013 – REVISED JANUARY 2017
REG
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The 5-Ÿ UHVLVWRU OLPLWV WKH UXVK FXUUHQW
discharge from the capacitor during cell
connection when Vss is not connected
5Ÿ
first.
This resistor is not required if Vss is
connected first in the cell connection
sequence.
0.47 µF
Loss of Vss connection or REG shorted to
high voltage can bring the REG above the
regulated range. This optional zener
clamp can protect the downstream circuit
under such an event.
Figure 18. 5-V Zener Diode
5. For 2- to 3-series applications, if an external control for the regulated output is required, select the bq2960xy
family. Otherwise, select the bq2961xy family.
9.2.3 Application Curves
Figure 19. Overvoltage Protection
Figure 20. Overvoltage Protection Release
Figure 21. Undervoltage Detection to Turn off Regulator
Figure 22. Undervoltage Release to Switch on Regulator
20
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