Single-Cell Protector
BQ2946
SLUSAS0E – DECEMBER 2011 – REVISED APRIL 2021
BQ2946xx Single-Cell Protector for Li-Ion Batteries
1 Features
• S...
Description
BQ2946
SLUSAS0E – DECEMBER 2011 – REVISED APRIL 2021
BQ2946xx Single-Cell Protector for Li-Ion Batteries
1 Features
Single-Cell Overvoltage Monitor for Secondary Protection
Fixed Programmable Delay Timer Fixed Overvoltage Protection (OVP) Threshold
– Available Range of 3.85 V to 4.6 V Fixed OVP Delay Option: 4 s or 6.5 s High-Accuracy OVP:
± 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 – Portable equipment and instrumentation
3 Description
The BQ2946xx family of products is a secondary-level overvoltage monitor and protector for Li-Ion battery pack systems. The cell is monitored for overvoltage condition and triggers an internal counter once the OVP threshold is exceeded; after a fixed set delay, the out is transitioned to a high level. The output is reset (goes low) if the cell voltage drops below the set threshold minus the hysteresis.
Device Information
PART NUMBER(1)
PACKAGE
BODY SIZE (NOM)
BQ294602
BQ294604 BQ294624
SON (6)
2.00 mm × 2.00 mm
BQ294682
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Pack +
RIN
VCELL CIN
NC V1 VSS
OUT VDD VSS
Simplified Schematic
RVD
CVD Pack –
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectu...
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