LTC4054ES5-4.2#TRMPBF

ANALOG Devices, Inc.
LTC4054-4.2/LTC4054X-4.2 Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Programmable Charge Current Up to 800mA No MOSFET, Sense Resistor or Blocking Diode Required Complete Linear Charger in ThinSOTTM Package for Single Cell Lithium-Ion Batteries Constant-Current/Constant-Voltage Operation with Thermal Regulation* to M...
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Корпус SOT235
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Тип Наименование Корпус Упаковка i Функция Батарея Интерфейс Uвх.макс Uвых U пит Iвых.макс Примечание T раб Карточка
товара
P= STC4054GR (ST) SOT235 в ленте 3000 шт Battery monitor IC with Coulomb counter/gas gauge 800mA STANDALONE LINEAR Li-Ion Battery charger with therminal regulation

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LTC4054-4.2/LTC4054X-4.2 Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Programmable Charge Current Up to 800mA No MOSFET, Sense Resistor or Blocking Diode Required Complete Linear Charger in ThinSOTTM Package for Single Cell Lithium-Ion Batteries 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 Charge Voltage with ±1% Accuracy Charge Current Monitor Output for Gas Gauging* Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25µA Supply Current in Shutdown 2.9V Trickle Charge Threshold (LTC4054) Available Without Trickle Charge (LTC4054X) Soft-Start Limits Inrush Current Available in 5-Lead SOT-23 Package U APPLICATIO S ■ ■ Cellular Telephones, PDAs, MP3 Players Charging Docks and Cradles Bluetooth Applications U ■ The LTC®4054 is a complete constant-current/constantvoltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the LTC4054 ideally suited for portable applications. Furthermore, the LTC4054 is specifically designed to work within USB power specifications. 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 LTC4054 automatically terminates 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 LTC4054 automatically enters a low current state, dropping the battery drain current to less than 2µA. The LTC4054 can be put into shutdown mode, reducing the supply current to 25µA. 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. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. *U.S.Patent No. 6,522,118 Complete Charge Cycle (750mAh Battery) TYPICAL APPLICATIO 700 600mA Single Cell Li-Ion Charger 1µF 4 VCC BAT LTC4054-4.2 PROG GND 3 600mA 5 1.65k 4.2V Li-Ion BATTERY 2 CONSTANT POWER 500 4.25 400 4.00 300 3.75 3.50 200 VCC = 5V θJA = 130°C/W RPROG = 1.65k TA = 25°C 100 0 405442 TA01a 4.50 CONSTANT VOLTAGE 0 CHARGE TERMINATED BATTERY VOLTAGE (V) VIN 4.5V TO 6.5V 4.75 CONSTANT CURRENT 600 CHARGE CURRENT (mA) ■ DESCRIPTIO 3.25 3.00 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 TIME (HOURS) 405442 TAO1b 405442xf 1 PDF
Документация на LTC4054ES5-4.2#TRMPBF 

LTC4054-4.2/LTC4054X-4.2 - Standalone Linear Li-lon Battery Charger with Thermal Regulation in ThinSOT

Дата модификации: 14.08.2007

Размер: 187.7 Кб

16 стр.

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