The bq2941x is a secondary overvoltage protection IC for 2-, 3-, or 4-cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit. It includes a programmable delay circuit for overvoltage detection time.
Each cell in a multiple-cell pack is compared to an internal reference voltage. If one cell reaches an overvoltage condition, the protection sequence begins. The bq2941x device starts charging an external capacitor through the CD pin. When the CD pin voltage reaches 1.2 V, the OUT pin changes from a low level to a high level.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Voltage Protection for 2-, 3-, or 4-Cell Li-Ion Batteries (2nd Level Protection) datasheet (Rev. G) | 18 Aug 2008 | |
| Application note | Stacking Multiple bqq2941x Li-Ion Secondary Voltage Protectors | 27 Aug 2007 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SSOP (DCT) | 8 | Ultra Librarian |
| TSSOP (PW) | 8 | Ultra Librarian |
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