BQ2000PWG4屬于集成電路（IC）的電池充電器。由美國德州儀器公司制造生產的BQ2000PWG4電池充電器電池充電器 PMIC（電源管理集成電路）是元器件級產品系列，用于在電子設備中實現電池充電控制和充電管理功能。這些器件主要根據電池化學及其設計用于的電池數量來分類，可提供電化學電池和超級電容器安全充電所必需的電流或電壓調節(jié)和監(jiān)視功能。

1FEATURES

? 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 Peak Voltage

(PVD) 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 bq2000 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 bq2000 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 bq2000 provides a

number of charge termination criteria:

? Peak voltage, PVD (for NiCd and NiMH)

? Minimum charge current (for Li-Ion)

? Maximum temperature

? Maximum charge time

For safety, the bq2000 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 bq2000 uses trickle-charge

to condition the battery. For NiMH batteries, the

bq2000 provides an optional top-off charge to

maximize the battery capacity.

The integrated high-speed comparator allows the

bq2000 to be the basis for a complete, high-efficiency

battery charger circuit for both nickel-based and

lithium-based chemistries.