Detalles del producto

Rating Catalog Number of series cells (max) 3, 4 Number of series cells (min) 2, 3, 4 Features Overvoltage, Single pin output drive Function Protection Operating current (typ) (µA) 2 Vin (max) (V) 25 Overvoltage protection 4.5 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 4.475 Battery overvoltage protection (max) (V) 4.525
Rating Catalog Number of series cells (max) 3, 4 Number of series cells (min) 2, 3, 4 Features Overvoltage, Single pin output drive Function Protection Operating current (typ) (µA) 2 Vin (max) (V) 25 Overvoltage protection 4.5 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 4.475 Battery overvoltage protection (max) (V) 4.525
TSSOP (PW) 8 19.2 mm² (3 mm × 6.4 mm) SSOP (DCT) 8 11.8 mm² (2.95 mm × 4 mm)
  • 2-, 3-, or 4-Cell Secondary Protection
  • Low Power Consumption ICC < 2 µA [VCELL(ALL) < V(PROTECT)]
  • Fixed High Accuracy Overvoltage Protection Threshold
    • bq29410 = 4.35 V
    • bq29411 = 4.40 V
    • bq29412 = 4.45 V
    • bq29413 = 4.50 V
    • bq29414 = 4.55 V
    • bq29415 = 4.60 V
    • bq29419 = 4.30 V
  • Programmable Delay Time of Detection
  • High Power Supply Ripple Rejection
  • Stable During Pulse Charge Operation
  • APPLICATIONS
    • 2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:
      • Notebook Computers
      • Portable Instrumentation
      • Portable Equipment
  • 2-, 3-, or 4-Cell Secondary Protection
  • Low Power Consumption ICC < 2 µA [VCELL(ALL) < V(PROTECT)]
  • Fixed High Accuracy Overvoltage Protection Threshold
    • bq29410 = 4.35 V
    • bq29411 = 4.40 V
    • bq29412 = 4.45 V
    • bq29413 = 4.50 V
    • bq29414 = 4.55 V
    • bq29415 = 4.60 V
    • bq29419 = 4.30 V
  • Programmable Delay Time of Detection
  • High Power Supply Ripple Rejection
  • Stable During Pulse Charge Operation
  • APPLICATIONS
    • 2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:
      • Notebook Computers
      • Portable Instrumentation
      • Portable Equipment

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.

FUNCTION

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.

FUNCTION

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.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Voltage Protection for 2-, 3-, or 4-Cell Li-Ion Batteries (2nd Level Protection) datasheet (Rev. G) 18/08/2008
Nota sobre la aplicación Stacking Multiple bqq2941x Li-Ion Secondary Voltage Protectors 27/08/2007

Diseño y desarrollo

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
TSSOP (PW) 8 Ultra Librarian
SSOP (DCT) 8 Ultra Librarian

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