BQ2970 Datasheet, PDF (1/31 Pages) Texas Instruments – Cost-Effective Voltage and Current Protection Integrated Circuit

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bq2970, bq2971, bq2972, bq2973
SLUSBU9C – MARCH 2014 – REVISED MARCH 2016
bq297xx Cost-Effective Voltage and Current Protection Integrated Circuit for Single-Cell
Li-Ion and Li-Polymer Batteries
1 Features
•1 Input Voltage Range Pack+: VSS – 0.3 V to 12 V
• FET Drive:
– CHG and DSG FET Drive Output
• Voltage Sensing Across External FETs for
Overcurrent Protection (OCP) Is Within ± 5 mV
(Typical)
• Fault Detection
– Overcharge Detection (OVP)
– Over-Discharge Detection (UVP)
– Charge Overcurrent Detection (OCC)
– Discharge Overcurrent Detection (OCD)
– Load Short-Circuit Detection (SCP)
• Zero Voltage Charging for Depleted Battery
• Factory Programmed Fault Protection Thresholds
– Fault Detection Voltage Thresholds
– Fault Trigger Timers
– Fault Recovery Timers
• Modes of Operation Without Battery Charger
Enabled
– NORMAL Mode I_CC = 4 µA
– Shutdown Iq = 100 nA
• Operating Temperature Range T_A = –40°C to
+85°C
• Package:
– 6-Pin DSE (1.50 mm × 1.50 mm × 0.75 mm)
2 Applications
• Tablet PC
• Mobile Handset
• Handheld Data Terminals
3 Description
The bq2970 battery cell protection device provides an
accurate monitor and trigger threshold for overcurrent
protection during high discharge/charge current
operation or battery overcharge conditions.
The bq2970 device provides the protection functions
for Li-Ion/Li-Polymer cells, and monitors across the
external power FETs for protection due to high
charge or discharge currents. In addition, there is
overcharge and depleted battery monitoring and
protection. These features are implemented with low
current consumption in NORMAL mode operation.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq2970, bq2971,
bq2972, bq2973 ⁽²⁾
WSON (6)
1.50 mm × 1.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) For available released devices, see the Released Device
Configurations table.
PACK +
2. 2 k
Simplified Schematic
NC
COUT
DOUT
V–
BAT
VSS
PACK–
S
CHG
D
S
DSG
330
CELLP
CELLN
OCD Detection Accuracy Versus Temperature
0.0
±0.5
±1.0
±1.5
±2.0
±2.5
±3.0
±3.5
±4.0
±40 ±20 0
20 40 60
Temperature (ƒC)
80 100 120
C012
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.