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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | BQ29209-Q1 Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-I datasheet (Rev. D) | 30 Sep 2020 | |
| Functional safety information | BQ29209-Q1 Functional Safety FIT Rate, FMD, and Pin FMA | 02 Aug 2020 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSON (DRB) | 8 | Ultra Librarian |
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