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PDF ( 数据手册 , 数据表 ) IT4054

零件编号 IT4054
描述 Standalone Linear Li-lon Battery Charger
制造商 Infiniture
LOGO Infiniture LOGO 


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IT4054 数据手册, 描述, 功能
IT4054
Standalone Linear Li-lon Battery Charger With
Thermal Regulation in ThinSOT
Description
Features
IT4054 is a complete constant-current & Constant voltage Programmable Charge Current Up to 800mA.
linear charge for single cellLithium-ion and Lithium-Polymer No MOSFET,Sense Resistor or Blocking Diode
batteries. Its Make IT4054 ideally suited for portable
Required.
Applications. Furthermore. The IT4054 is Specifically Constant-Current/Constant-Voltage Operation with
designed to work within USB Power sprcification. At the
Thermal
same time, IT4054 Can also be used in the standalone
Protection to Maximize Charge Rate without Risk of
lithium - Ion And Lithium-polymer battery charger. No
Overheating.
external sense resistor is needed, and No Blocking diode is Charges Single Cell Li-lon Batteries Directly from USB
required due to the Internal MOSFET architecture. Thermal
Port.
feedback Regulates the charge current to limit the Preset 4.2V Charge Voltage with ±1% Accuracy.
dieTemperature during high power operation or High 25uA Supply Current in Shutdown
ambient temperature. The charge voltage Is fixed at 4.2V, 2.9V Trickle Charge Threshold
and the charge current can be programmed externally with Available Without Trickle Charge
a single resistor .The IT4054 automatically thrminates the Soft-Start Limits Inrush Current
charge cycle when the charge current drops to 1/10th the Available in 5-Lead SOT-23 Package
programmed value after the final float voltage is reached. Application
When the input supply ( wall adapter or USB supply ) is Cellular Telephones. PDA’s,MP3 Players.
removed. The IT4054 automatically enters a low current Charging Docks and Cradles
stage,dropping the battery drain current to less than 2uA Bluetooth Applications
The IT4054 can be put into shutdown mode. Reducing
the supply current to 25 uA. 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.
Other features include charge current monitor,undervoltage
Lockout,automatic recharge and a status pin to indicate
Charge termination and the presenceof an input voltage
1
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