Datasheet > ACT3780QY-T

ACT3780QY-T

更新时间： 2024-11-18 06:36:03

品牌	Logo	应用领域
技领 - ACTIVE-SEMI		电池
页数	文件大小	规格书
2页	142K
描述
ActivePath™ Battery Charger

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中文翻译

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ACT3780QY-T 数据手册

ACT3780

Product Brief, 29-May-08

Active- Semi

Advanced Information―All Information Subject to Change

ActivePath^TMBattery Charger

FEATURES

GENERAL DESCRIPTION

• ActivePath^TMSystem Power Selection of Best

The ACT3780 is a complete battery charging and

management solution for one cell Lithium-Ion or Lith-

ium-Polymer battery. The ACT3780 incorporates the

ActivePath architecture which automatically selects

the best available input supply for the system.

Available Input Supply

• 40mΩ Battery Switch for Highest Efficiency

• Dynamic Control of Charging Current Allowing

System to Draw Maximum Load from AC/USB

Input

When an external power source such as an AC

adapter or a USB port is connected in, the ACT3780

regulates the system voltage to 4.8V in addition to

providing charging current to the battery. If the exter-

nal input source is not present or the system load

current is more than the input source can provide,

the ActivePath supplies additional current from the

battery to the system.

• ±0.5% Battery Voltage Accuracy

• Up to 12V Input

• Thermal Regulation for Charge Control

• Charge Status Outputs for LED or System

Interface

• Battery Voltage Level Indication

The ACT3780 charger is a complete, thermally

regulated, stand-alone single cell linear Li+ charger

that integrates an internal power 12V MOSFET. The

battery regulation voltage is ±0.5% accurate, and is

factory programmed from 4.2V (other voltages avail-

able upon request).

• Programmable Fast Charge Current

• Programmable Charging Timer

• Low Reverse Leakage Current

• Short-Circuit and Thermal Protection

• Preconditioning for Deeply Depleted Battery

• Low Quiescent Current Standby Mode

The ACT3780 is available in an thermally enhanced

4mm x 4mm Thin-QFN and 3.5mm × 4.5mm Thin-

DFN 20-pin packages.

• Space-Saving, Thermally-Enhanced TQFN44-20

or TDFN3545-20 Packages

APPLICATIONS

• Personal Navigation Devices

• Smart Mobile Phones

• Blue-Tooth Devices

• Portable Media Players

• Portable Devices

SIMPLIFIED APPLICATION CIRCUIT

AC Adapter/USB

CHG_IN

To SYSTEM

SYS

Pb-free

Li-ion Battery

BAT

STAT1

STAT2

ISET

ACT3780

ActivePath

Innovative Power^TM

ActivePath^TMis a trademark of Active-Semi.

- 1 -

www.active-semi.com

中文翻译

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