BQ29209DRBR Part Information
Details for BQ29209DRBR by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Battery Management

Part Description
The bq2920x device is a secondary overvoltage protection IC for 2-series cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit and automatic cell imbalance correction. The voltage of each cell in a 2-series cell battery pack is compared to a factory programmed internal reference voltage. If either cell reaches an overvoltage condition, the OUT pin changes from low to high state. The bq2920x can perform automatic voltage-based cell imbalance correction. Balancing can start when the cell voltages are different by nominally 30 mV or more and stops when the difference is nominally 0 mV. Cell balancing is enabled and disabled by the CB_EN pin.
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Part Features
- 2-Series Cell Secondary Protection
- Automatic Cell Imbalance Correction with External Enable Control u2013 u00b130-mV Enable, 0-mV Disable Thresholds Typical
- External Capacitor-Controlled Delay Timer
- External Cell Balancing Mode Supported
- External Resistor-Controlled Cell Balance Current
- Fixed Overvoltage Protection Thresholds: 4.30 V, 4.35 V
- High-Accuracy Overvoltage Protection: u2013 u00b125 mV with TA = 0u00b0C to 60u00b0C
- Internal Cell Balancing Handles Current up to 15 mA
- Low Power Consumption ICC < 3 u00b5A Typical (VCELL(ALL) < VPROTECT)
- Small 8L DRB Package
Part Specifications
Battery Type | Li-Ion |
Battery Protection | Over Voltage |
No. of Batteries | 2 |
Shutdown Current | - |
Battery IC Case Style | VSON |
No. of Pins | 8Pins |
Supply Voltage Min | 4V |
Supply Voltage Max | 10V |
Operating Temperature Min | -40°C |
Operating Temperature Max | 85°C |
Product Range | - |
RoHS Phthalates Compliant | Yes |
MSL | MSL 2 - 1 year |
SVHC | No SVHC (27-Jun-2018) |
Alternative Part Descriptions
- Voltage Protection for Li-Ion Batt. VSON | RS Components
- BATT PROT, LI-ION, 10V, VSON-8 | Newark Electronics
- Voltage Protection with Automatic Cell Balance For 2-Cell Li-Ion Batteries, OVP=4.30V | Texas Instruments
- Texas Instruments BQ29209DRBR Batarya Gerilim Koruma Entegresi, 4 → 10 V, 8-Pinli, SON | RS Components TR
- Voltage Protection for Li-Ion Batt. VSON | RS Components IT