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.
Features
• 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)
Applications
• Tablet PC
• Mobile Handset
• Handheld Data Terminals
Feature
- Input voltage range pack+: VSS – 0.3 V to 12 V
- FET drive:
- CHG and DSG FET driveoutput
- Voltage sensing across external FETs forovercurrent protection (OCP) is within ±5 mV (typical)
- Faultdetection
- Overcharge detection (OVP)
- Over-dischargedetection (UVP)
- Charge overcurrent detection(OCC)
- Discharge overcurrent detection (OCD)
- Loadshort-circuit detection (SCP)
- Zero voltage chargingfor depleted battery
- Factory programmed fault protectionthresholds
- Fault detection voltage thresholds
- Faulttrigger timers
- Fault recoverytimers
- Modes of operation without battery chargerenabled
- NORMAL mode ICC = 4μA
- Shutdown Iq = 100 nA
- Operatingtemperature range TA = –40°C to +85°C
- Package:
- 6-pin DSE (1.50 mm × 1.50 mm× 0.75 mm)
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DescriptionThe BQ2970 battery cell protection deviceprovides an accurate monitor and trigger threshold for overcurrent protection during highdischarge/charge current operation or battery overcharge conditions.
The BQ2970 device provides the protection functions for li-ion/li-polymer cells, andmonitors across the external power FETs for protection due to high charge or discharge currents. Inaddition, there is overcharge and depleted battery monitoring and protection. These features areimplemented with low current consumption in NORMAL mode operation.
(Picture: Pinout)
