BQ29700DSER Texas Instruments 电池管理 Second Level Protector

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 ICC = 4 μA

– Shutdown Iq = 100 nA

• Operating Temperature Range TA = –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.