BQ24205DGNG4

更新时间： 2024-09-16 12:33:35

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
20页	1140K
描述
SINGLE-CHIP LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR CURRENT-LIMITED APPLICATIONS

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BQ24205DGNG4 数据手册

bq24200, bq24201

bq24202, bq24203

bq24204, bq24205

www.ti.com

SLUS501C–OCTOBER 2001–REVISED MARCH 2008

SINGLE-CHIP LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR CURRENT-LIMITED

APPLICATIONS

FEATURES

DESCRIPTION

•

Designed Specifically to Work With

Current-Limited Wall Supplies

The bq2420x series are simple Li-Ion linear charge

management devices targeted at low-cost and space

limited charger applications. The bq2420x series offer

•

Ideal for Low Dropout Charger Design for

Single-Cell Li-Ion Packs With Coke or Graphite

Anodes

integrated

powerFET,

high-accuracy

voltage

regulation, temperature monitoring, charge status,

and charge termination, in a single monolithic device.

•

Integrated PowerFET for 500 mA

Integrated Voltage Regulation With 0.5%

Accuracy

The bq2420x is designed to work with

current-limited wall-mount transformer and therefore

does not provide any current regulation. However,

these devices offer a fixed internal current limit to

•

Battery Insertion and Removal Detection

Charge Termination by Minimum Current and

Time

prevent damage to the internal powerFET.

time-limited pre-conditioning phase is provided to

condition deeply discharged cells. Once the battery

reaches the charge voltage, the high accuracy

voltage regulation loop takes over and completes the

charge cycle. Charge is terminated based on

minimum current. An internal charge timer provides a

backup safety for charge termination.

•

Pre-Charge Conditioning With Safety Timer

Sleep Mode for Low-Power Consumption

Charge Status Output for LED or Host

Processor Interface Indicates

•

Charge-in-Progress, Charge Completion, and

Fault Conditions

Other standard features include an automatic sleep

mode activated when V_CCfalls below the battery

voltage and a recharge feature activated when the

battery voltage falls below the V_RCHthreshold.

Optional Temperature Monitoring Before and

During Charge

Small, 8-Pin Power-Pad MSOP Package

In addition to the standard features, the core product

provides two additional enhancements: temperature

monitoring and status display. The temperature-

sense circuit continuously measures battery

temperature using an external thermistor and inhibits

charge until the battery temperature is within the

user-defined thresholds. The STAT pin indicates

three conditions of operation of the charger. These

conditions are charge-in-progress, charge complete,

and fault. This output can be used to drive an LED or

an interface to a microcontroller.

TYPICAL APPLICATION

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...20

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