Datasheet > A4055E5R

A4055E5R

更新时间： 2024-09-14 01:15:03

品牌	Logo	应用领域
创瑞 - AITSEMI		/
页数	文件大小	规格书
19页	765K
描述
STANDALONE LINEAR LI-ION BATTERY CHARGER

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中文翻译

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A4055E5R 数据手册

A4055

BATTERY MANAGEMENT

AiT Semiconductor Inc.

www.ait-ic.com

800mA STANDALONE LINEAR LI-ION BATTERY CHARGER

DESCRIPTION

FEATURES

The A4055 is

complete constant-current



Programmable Charge Current Up to 800mA

No MOSFET, Sense Resistor or Blocking Diode

Required

constant-voltage linear charger for single cell

lithium-Ion batteries. No external sense resistor is

needed, and no blocking diode is required due to the

internal MOSFET architecture. Thermal feedback

regulates the charge current to limit the die

temperature during high power operation or high

ambient temperature. The charge voltage is fixed at

4.2V, and the charge current can be programmed



Preset 4.2V Charge Voltage with ±1% Accuracy

Charge Current Monitor Output for Gas Gauging



Thermal Regulation Maximizes Charge Rate

Without Risk of Overheating

Charges Single Cell Li-Ion Batteries directly

from USB Port

externally with

single resistor. The A4055



automatically terminates the charge cycle when the

charge current drops to 1/10 the programmed value

after the final float voltage is reached.



Over-Voltage Protect

When the input supply (wall adapter or USB supply)

is removed, the A4055 automatically enters a low

current state, dropping the battery drain current to

less than 2μA. The A4055 can be put into shutdown

mode, reducing the supply current to 25μA. Other

Automatic Recharge

Charge Status Output Pin

C/10 Charge Termination

25μA Supply Current in Shutdown

2.9V Trickle Charge Threshold

Soft-Start Limits Inrush Current

Available in SOT-25 Package

features

include

charge

current

monitor,

under-voltage lockout, automatic recharge and a

status pin to indicate charge termination and the

presence of an input voltage.

The A4055 is available in SOT-25 Package

APPLICATION



Cellular and Smart Phones

Charging Docks and Cradles

Blue Tooth Applications

PDAs

ORDERING INFORMATION

MP3/MP4/MP5 Players

Package Type

SOT-25

Part Number

A4055E5R

A4055E5VR

TYPICAL APPLICATION

SPQ: 3,000pcs/Reel

V: Halogen free package

R: Tape & Reel

Note

AiT provides all RoHS products

600mA Application Circuit

REV1.2

- OCT 2011 RELEASED, SEP 2018 UPDATED -

- 1 -

12 3 4 5 6 7...19

中文翻译

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