Datasheet > EC49017NNMHR

EC49017NNMHR

更新时间： 2022-02-26 12:22:13

品牌	Logo	应用领域
飞虹 - E-CMOS		电池
页数	文件大小	规格书
11页	387K
描述
Standalone Linear Lithium Battery Charger

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EC49017NNMHR 数据手册

EC49017

Standalone Linear Lithium Battery Charger

Features

General Description



Programmable Charge Current Up to 800mA

EC49017 is

a complete constant-current &



No MOSFET, Sense Resistor or Blocking Diode

Required

constant voltage linear charger for single cell lithium-ion

and Lithium-Polymer batteries. Its SOT23 package and

low external component count make EC49017 ideally

suited for portable applications. Furthermore, the

EC49017 is specifically designed to work within USB

power specification. At the same time, EC49017 can

also be used in the standalone lithium-ion and

Lithium-polymer battery chargers.



Constant-Current/Constant-Voltage Operation with

Thermal Protection to Maximize Charge Rate

without Risk of Overheating

Charges Single Cell Li-ion Batteries Directly from

USB Port



Preset 4.22V Charge Voltage with ±1% Accuracy

20μ A Supply Current in Shutdown

2.9V Trickle Charge Threshold

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 4.22V, and the charge current can be

programmed externally with a single resistor.The

EC49017 automatically terminates the charge cycle

when the charge current drops to 1/10^ththe

programmed value after the final float voltage is

reached.

Soft-Start Limits Inrush Current

Available in 6-Lead SOT23 and SOP-8(Exposed

PAD) Packages



RoHS Compliant and 100% Lead Pb free

Applications



Cellular Telephones, PDA, MP3 Players

When the input supply (wall adapter or USB

supply) is removed, the EC49017 automatically enters a

low current stage, dropping the battery drain current to

Charging Docks and Cradles

Bluetooth Applications

less than 2uA.

The EC49017 can be put into

shutdown mode, reducing the supply current to 20uA.

Other features include charge current monitor,

undervoltage lockout, automatic recharge and a status

pin to indicate charge termination and the presence of

an input voltage. EC49017 is intentionally designed to

have slightly negative Tempco. This provides extra

protection to Lithium battery during charging.

Application Diagram

Pin Configuration

E-CMOS Corp. (www.ecmos.com.tw)

Page 1 of 11

3H20N Rev. P001

12 3 4 5 6 7...11

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