BQ24006 Datasheet

IC型号：
BQ24006
PDF描述：
锂离子线性 (8.2V 8.4V) 充电管理 IC，用于具有集成 FET、双色 L...
文件大小：
908.00KB
PDF页数：
22页
芯片厂家：
TI

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bq24004

bq24005

bq24006

SLUS476B 鈥?DECEMBER 2000 鈥?REVISED MAY 2002

TWO-CELL Li-ION CHARGE MANAGEMENT IC FOR PDAs

AND INTERNET APPLIANCES

FEATURES

Highly Integrated Solution With FET Pass

Transistor and Reverse-Blocking Schottky

and Thermal Protection

DESCRIPTION

The bq2400x series ICs are advanced Li-Ion linear

charge management devices for highly integrated and

space-limited applications. They combine high-

accuracy current and voltage regulation; FET pass-

transistor and reverse-blocking Schottky; battery

conditioning, temperature, or input-power monitoring;

charge termination; charge-status indication; and

charge timer in a small package.

The bq2400x measures battery temperature using an

external thermistor. For safety, the bq2400x inhibits

charge until the battery temperature is within the

user-defined thresholds. Alternatively, the user can

monitor the input voltage to qualify charge. The

bq2400x series then charge the battery in three phases:

preconditioning, constant current, and constant

voltage. If the battery voltage is below the internal

low-voltage threshold, the bq2400x uses low-current

precharge to condition the battery. A preconditioning

timer provides additional safety. Following pre-

conditioning, the bq2400x applies a constant-charge

current to the battery. An external sense-resistor sets

the magnitude of the current. The constant-current

phase is maintained until the battery reaches the

charge-regulation voltage. The bq2400x then

transitions to the constant voltage phase. The user can

configure the device for cells with either coke or

graphite anodes. The accuracy of the voltage regulation

is better than

卤1%

over the operating junction

temperature and supply voltage range.

Charge is terminated by maximum time or minimum

taper current detection

The bq2400x automatically restarts the charge if the

battery voltage falls below an internal recharge

threshold.

Integrated Voltage and Current Regulation

With Programmable Charge Current

High-Accuracy Voltage Regulation (卤1%)

Ideal for Low-Dropout Linear Charger

Designs for Two-Cell Li-Ion Packs With Coke

or Graphite Anodes

Up to 1.2-A Continuous Charge Current

Safety-Charge Timer During Preconditioning

and Fast Charge

Integrated Cell Conditioning for Reviving

Deeply Discharged Cells and Minimizing Heat

Dissipation During Initial Stage of Charge

Optional Temperature or Input-Power

Monitoring Before and During Charge

Various Charge-Status Output Options for

Driving Single, Double, or Bicolor LEDs or

Host-Processor Interface

Charge Termination by Minimum Current and

Time

Low-Power Sleep Mode

Packaging: 20-Lead TSSOP PowerPAD铮?/div>

APPLICATIONS

PDAs

Internet Appliances

MP3 Players

Digital Cameras

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

铮?/div>

2002, Texas Instruments Incorporated

型号

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