Datasheet > BL8573

BL8573

更新时间： 2024-11-15 01:04:55

品牌	Logo	应用领域
上海贝岭 - BELLING		电池
页数	文件大小	规格书
12页	1255K
描述
500mA/1.5A Standalone Linear Li-Ion Battery Charge

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BL8573 数据手册

BL8573

500mA/1.5A Standalone Linear Li-Ion Battery Charge

FEATURES

DESCRIPTION

The BL8573 is a single cell, fully integrated

constant current (CC)/constant voltage (CV) Li-ion

battery charger. Its compact package with

minimum external components requirement

makes the BL8573 ideal for portable applications.



Standalone Capability with no Requirement

of External MOSFET, Sense Resistor or

Blocking Diode.

Complete Linear Charger in Compact Package

for Single Cell Lithium-Ion Batteries

Programmable Pre-charge, Fast Charge and

Termination Current.

Constant-Current/Constant-Voltage Operation

with Thermal Regulation to Maximize Charge

Rate Without Risk of Overheating

Charges Single Cell Li-Ion Batteries Directly

from USB Port

Preset 4.2V/4.35V Charge Voltage with 1%

Accuracy

Automatic Recharge

Charge Status Output Pin

C/10 Charge Termination



No external sense resistor or blocking diode is

necessary for the BL8573. Build-in thermal

feedback mechanism regulates the charge

current to control the die temperature during

high power operation or at elevated ambient

temperature.



The BL8573 has a pre-charge function for trickle

charging deeply discharged batteries. The fast

charge current can be programmed by an

external resistor. CV regulation mode is

automatically enabled once the battery’s

charging curve reaches the constant voltage

portion. The output current then decays and is

finally terminated once the charge current drops

to 1/10^thof the programmed value. The BL8573

keeps monitoring the battery voltage and enables

a new charge cycle once the voltage drops by

150mV below the CV value.



25A Supply Current in Shutdown

2.9V Trickle Charge Threshold

Soft-Start Limits Inrush Current

Available in SOT-23-6 and ESOP8 Package

Power supply state is constantly monitored and

the battery drain current is reduced to minimum

value automatically when the BL8573 senses a

lack of input power. In its shutdown mode, the

BL8573 can reduce the supply current to less than

25μA. A status pin outputs a logic HIGH/LOW to

indicate the charging status and the presence of

power supply.

APPLICATIONS



Cellular Telephones, PDAs, MP3 Players

Charging Docks and Cradles

Bluetooths Applications

Other features include charge current monitor,

under-voltage lockout.

TYPICAL APPLICATION

BL8573

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