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  • BT4056B

迅瑞创芯BT4056B

产品规格:ESOP-8

产品型号:BT4056B

产品品牌:迅瑞创芯

产品价格:欢迎咨询0755-86003350

应用范围:手机░,PDA░,MP3

DESCRIPTION
The BT4056 is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Its compact size and low external component count make the BT4056 ideally suited for portable applications. Furthermore, the BT4056 is specifically designed to work charging the battery from the power supplies of the 5V adapter and the USB port.
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 externally with a single resistor. The BT4056 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
Other features include charge current monitor, battery reversed protection, under voltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage.

The BT4056 is available in ESOP8 package requiring minimum board space and smallest components. It is rated over the -40°C to +85°C temperature range.


FEATURES

 Programmable Charge Current up to 1A
 No MOSFET, Sense Resistor or Blocking Diode Required
 Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate without Risk of Overheating
 Charge Single Cell Li-Ion Batteries Directly from USB Port
 Charge Current Monitor Output for Gas Gauging
 Preset 4.2V Charge Voltage with 1% Accuracy
 2.9V Trickle Charge Threshold
 C/10 Charge Termination
 55μA Supply Current in Shutdown Mode
 Automatic Recharge
 Soft-Start Limits Inrush Current
 Battery Reversed Protection
 Available in the Green ESOP8 Package


APPLICATIONS

 Mobile Phones, PDAs, MP3 Players
 Charging Docks and Cradles
 Bluetooth Applications
 Other Handheld Devices




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