BQ294602_17 Datasheet, PDF (1/21 Pages) Texas Instruments – Single-Cell Protector for Li-Ion Batteries

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bq294602, bq294604, bq294682, bq294624
SLUSAS0D – DECEMBER 2011 – REVISED APRIL 2017
bq2946xx Single-Cell Protector for Li-Ion Batteries
1 Features
•1 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 I_CC ≈ 1 µA
(V_CELL(ALL) < V_PROTECT)
• 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⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq294602
bq294604
bq294682
SON (6)
2.00 mm × 2.00 mm
bq294624
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Pack +
RIN
VCELL
CIN
bq2946xx
NC
OUT
V1
VDD
VSS
VSS
RVD
CVD
Pack –
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.