Overvoltage Protection
BQ294502, BQ294504, BQ294506, BQ294512, BQ294522 BQ294524, BQ294532, BQ294533, BQ294534, BQ294582, BQ294592
SLUSAJ3K – S...
Description
BQ294502, BQ294504, BQ294506, BQ294512, BQ294522 BQ294524, BQ294532, BQ294533, BQ294534, BQ294582, BQ294592
SLUSAJ3K – SEPTEMBER 2011 – REVISED AUGUST 2022
BQ2945xy Overvoltage Protection For 2-Series and 3-Series Cell Li-Ion Batteries
1 Features
2-series and 3-series cell overvoltage monitor for secondary protection
Fixed programmable delay timer Fixed OVP threshold
– Available range from 3.85 V to 4.6 V Fixed OVP delay option: 4 s or 6.5 s High-accuracy overvoltage protection:
±10 mV Low power consumption ICC ≈ 1 µA
(VCELL(ALL) < VPROTECT) Low leakage current per cell input < 100 nA Small package footprint
– 6-pin SON
2 Applications
Second-level protection in Li-ion battery packs in: – Tablets – Slates – Power tools – Notebook computers – Portable equipment and instrumentation
3 Description
The BQ2945xy family of products is a secondary-level voltage monitor and protector for Li-ion battery pack systems. Each cell is monitored independently for an overvoltage condition. Based on the configuration, an output is triggered after a fixed delay if any of the two or three cells has an overvoltage condition. This output is triggered into a high state after an overvoltage condition satisfies the specified delay timer.
Device Information
PART NUMBER(1)
PACKAGE
BODY SIZE (NOM)
BQ2945xy
SON (6)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Pack +
VCELL3 VCELL2 VCELL 1
RVD
RIN
V3
RIN
CIN
V...
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