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ITT Standalone Linear Li-lon Battery Charger! IT4504 SOT23-5 package!
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email：sumzi@sumzi.com
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Datasheet:
IT4504.pdfDescription
IT4054 is a complete constant-current & Constant voltage linear charge for single cellLithium-ion and Lithium-Polymer batteries. Its Make IT4054 ideally suited for portable Applications. Furthermore. The IT4054 is Specifically designed to work within USB Power sprcification. At the same time, IT4054 Can also be used in the standalone lithium - Ion And Lithium-polymer battery charger. 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
dieTemperature during high power operation or High ambient temperature. The charge voltage Is fixed at 4.2V, and the charge current can be programmed externally with a single resistor .The IT4054 automatically thrminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply ( wall adapter or USB supply ) is removed. The IT4054 automatically enters a low current
stage,dropping the battery drain current to less than 2uA 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
Features
● Programmable Charge Current Up to 800mA.
● No MOSFET,Sense Resistor or Blocking Diode Required.
● Constant-Current/Constant-Voltage Operation with Thermal
Protection to Maximize Charge Rate without Risk of
Overheating.
● Charges Single Cell Li-lon Batteries Directly from USB
Port.
● Preset 4.2V Charge Voltage with ±1% Accuracy.
● 25uA Supply Current in Shutdown
● 2.9V Trickle Charge Threshold
● Available Without Trickle Charge
● Soft-Start Limits Inrush Current
● Available in 5-Lead SOT-23 Package
Application
● Cellular Telephones. PDA’s,MP3 Players.
● Charging Docks and Cradles
● Bluetooth Applications
Contact person:
Frances New
Phone:+86-755-81832961
Fax:+86-755-83299282
Email:sumzi@sumzi.com
MSN:sumzi-frances@msn.com
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