Gehäuseinformationen
| Gehäuse | Pins VSON (DRB) | 8 |
| Betriebstemperaturbereich (°C) -40 to 105 |
| Gehäusemenge | Träger 3.000 | LARGE T&R |
Merkmale von BQ29209-Q1
- 2-series cell secondary protection
- Automatic cell imbalance
correction with external enable control
- ±30-mV enable, 0-mV disable thresholds typical
- External capacitor-controlled delay timer
- External resistor-controlled cell balance current
- Low power consumption ICC < 3 µA typical (VCELL(ALL) < VPROTECT)
- Internal cell balancing handles current up to 15 mA
- External cell balancing mode supported
- High-accuracy overvoltage
protection:
- ±25 mV with TA = 0°C to 60°C
- Fixed overvoltage protection threshold: 4.30 V
- Small 8L DRB package
- Functional Safety-Capable
- Automotive-qualified AEC Q100 grade two
Beschreibung von BQ29209-Q1
The BQ29209-Q1 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 BQ29209-Q1 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.