BQ24400中文资料具有峰值电压检测终端的开关模式镍镉电池/镍氢电池充电器数据手册TI规格书

描述 Description

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, PVDMaximum temperatureMaximum 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.

特性 Features

• 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