BQ2000T - 具有 dT/dt 终端的多化合物开关模式充电管理 IC

BQ2000T是TI德州仪器公司的一款电池充电器IC产品，BQ2000T是具有 dT/dt 终端的多化合物开关模式充电管理 IC，本站介绍了BQ2000T的封装应用图解、特点和优点、功能等，并给出了与BQ2000T相关的TI元器件型号供参考。

BQ2000T - 具有 dT/dt 终端的多化合物开关模式充电管理 IC - 电池充电器IC - 电池管理产品 - 德州仪器

产品描述

产品特性

Safe Management of Fast Charge for NiCd, NiMH, or Li-Ion 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 ΔT/Δt for Nickel Chemistries, Minimum Current for Li-Ion Chemistries, 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
- Multi-Chemistry Charger
- Nickel Charger
- High-Power, Multi-Cell Charger

GENERAL DESCRIPTION

The bq2000T is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or multi-chemistry applications. The bq2000T chooses the proper battery chemistry (either nickel or lithium) and proceeds with the optimal charging and termination algorithms. This process eliminates undesirable, undercharged, or overcharged conditions, and allows accurate and safe termination of fast charge.

Depending on the chemistry, the bq2000T provides a number of charge termination criteria:

Rate of temperature rise (ΔT/Δt) (for NiCd and NiMH)
Minimum charge current (for Li-Ion)
Maximum temperature
Maximum charge time

For safety, the bq2000T inhibits fast charge until the battery voltage and temperature are within user-defined limits. If the battery voltage is below the low-voltage threshold, the bq2000T uses trickle-charge to condition the battery. For NiMH batteries, the bq2000T provides an optional top-off charge to maximize the battery capacity.

The integrated high-speed comparator allows the bq2000T to be the basis for a complete, high-efficiency battery charger circuit for both nickel-based and lithium-based chemistries.

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