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Circuitos integrados de gestión de baterías
CI para cargador de batería

BQ24400

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Cargador de batería NiCd/NiMH de modo de conmutación con terminación de detección de tensión máxima

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BQ24400 está en proceso de ser discontinuado
Este producto está en proceso de ser suspendido. Los nuevos diseños deben considerar un producto alternativo.
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BQ25172 ACTIVO Cargador lineal autónomo NiMH de 0.8 A y de 1 a 6 celdas en un encapsulado QFN This charger offers simplicity and flexibility

BQ24400

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Detalles del producto

Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry NiCd, NiMH Charge current (max) (A) 2 Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4 Vin (max) (V) 6 Absolute max Vin (max) (V) 7 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 0.95 Battery charge voltage (max) (V) 8 Control interface Standalone (RC-Settable) Operating temperature range (°C) -20 to 70
Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry NiCd, NiMH Charge current (max) (A) 2 Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4 Vin (max) (V) 6 Absolute max Vin (max) (V) 7 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 0.95 Battery charge voltage (max) (V) 8 Control interface Standalone (RC-Settable) Operating temperature range (°C) -20 to 70
TSSOP (PW) 8 19.2 mm² (3 mm × 6.4 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Safe Management of Fast Charge for NiCd and NiMH Battery Packs
  • High-Frequency Switching Controller for Efficient and Simple Charger Design
  • Pre-Charge Qualification for Detecting Shorted, Damaged, or Overheated Cells
  • Fast-Charge Termination by Peak Voltage (PVD), Maximum Temperature, and Maximum Charge Time
  • Selectable Top-Off Mode for Achieving Maximum Capacity in NiMH Batteries
  • Programmable Trickle-Charge Mode for Reviving Deeply Discharged Batteries and for Postcharge Maintenance
  • Built-in Battery Removal and Insertion Detection
  • Sleep Mode for Low Power Consumption
  • APPLICATIONS
    • Nickel Charger
    • High-Power, Multi-Cell Charger
  • Safe Management of Fast Charge for NiCd and NiMH Battery Packs
  • High-Frequency Switching Controller for Efficient and Simple Charger Design
  • Pre-Charge Qualification for Detecting Shorted, Damaged, or Overheated Cells
  • Fast-Charge Termination by Peak Voltage (PVD), Maximum Temperature, and Maximum Charge Time
  • Selectable Top-Off Mode for Achieving Maximum Capacity in NiMH Batteries
  • Programmable Trickle-Charge Mode for Reviving Deeply Discharged Batteries and for Postcharge Maintenance
  • Built-in Battery Removal and Insertion Detection
  • Sleep Mode for Low Power Consumption
  • APPLICATIONS
    • Nickel Charger
    • High-Power, Multi-Cell Charger

The bq24400 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd) and nickel metal-hydride (NiMH) in single or multi-cell applications.

The bq24400 provides these charge termination criteria:

  • Peak voltage, PVD
  • Maximum temperature
  • Maximum charge time

For safety, the bq24400 inhibits fast charge until the battery voltage and temperature are within user-defined limits. If the battery voltage is below the low-voltage threshold, thebq24400 uses trickle-harge to condition the battery. For NiMH batteries, the bq24400 provides an optional top-off charge to maximize the battery capacity.

The integrated high-speed comparator allows the bq24400 to be the basis for a complete, high-efficiency battery charger circuit for nickel-based chemistries.

The bq24400 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd) and nickel metal-hydride (NiMH) in single or multi-cell applications.

The bq24400 provides these charge termination criteria:

  • Peak voltage, PVD
  • Maximum temperature
  • Maximum charge time

For safety, the bq24400 inhibits fast charge until the battery voltage and temperature are within user-defined limits. If the battery voltage is below the low-voltage threshold, thebq24400 uses trickle-harge to condition the battery. For NiMH batteries, the bq24400 provides an optional top-off charge to maximize the battery capacity.

The integrated high-speed comparator allows the bq24400 to be the basis for a complete, high-efficiency battery charger circuit for nickel-based chemistries.
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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Programmable NiCd / NiMH Fast-Charge Management IC datasheet (Rev. A) 2/02/2010

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