BQ29411 Series
Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.40V)
Manufacturer: Texas Instruments
Catalog
Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.40V)
Key Features
• 2-, 3-, or 4-Cell Secondary ProtectionLow Power Consumption ICC< 2 µA [VCELL(ALL)< V(PROTECT)]Fixed High Accuracy Overvoltage Protection Thresholdbq29410 = 4.35 Vbq29411 = 4.40 Vbq29412 = 4.45 Vbq29413 = 4.50 Vbq29414 = 4.55 Vbq29415 = 4.60 Vbq29419 = 4.30 VProgrammable Delay Time of DetectionHigh Power Supply Ripple RejectionStable During Pulse Charge OperationAPPLICATIONS2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:Notebook ComputersPortable InstrumentationPortable Equipment2-, 3-, or 4-Cell Secondary ProtectionLow Power Consumption ICC< 2 µA [VCELL(ALL)< V(PROTECT)]Fixed High Accuracy Overvoltage Protection Thresholdbq29410 = 4.35 Vbq29411 = 4.40 Vbq29412 = 4.45 Vbq29413 = 4.50 Vbq29414 = 4.55 Vbq29415 = 4.60 Vbq29419 = 4.30 VProgrammable Delay Time of DetectionHigh Power Supply Ripple RejectionStable During Pulse Charge OperationAPPLICATIONS2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:Notebook ComputersPortable InstrumentationPortable Equipment
Description
AI
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.
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.
