Electronic Components Datasheet Search |
|
LTC4078 Datasheet(PDF) 1 Page - Linear Technology |
|
LTC4078 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC4078/LTC4078X 1 4078xfb FEATURES APPLICATIONS DESCRIPTION Dual Input Li-Ion Battery Charger with Overvoltage Protection The LTC®4078/LTC4078X are standalone linear chargers that are capable of charging a single-cell Li-Ion/Polymer battery from both wall adapter and USB inputs. The chargers can detect power at the inputs and automatically select the appropriate power source for charging. No external sense resistor or blocking diode is required for charging due to the internal MOSFET architecture. The LTC4078/LTC4078X feature a maximum 22V rating for both wall adapter and USB inputs, although charging stops if the selected power source exceeds the overvoltage limit. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature con- ditions. The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. The LTC4078/LTC4078X terminate the charge cycle when the charge current drops below the programmed termination threshold after the final float voltage is reached. Other features include battery present detection, automatic recharge, undervoltage lockout, charge status outputs, and “power present” status outputs to indicate the presence of wall adapter or USB power. The device is offered in a low profile (0.75mm) 3mm × 3mm 10-lead DFN package. n 22V Maximum Voltage for Wall Adapter and USB Inputs n Charge Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs n Automatic Input Power Detection and Selection n Charge Current Programmable Up to 950mA from Wall Adapter Input n Overvoltage Lockout for Wall Adapter and USB Inputs n Battery Detection Input Disables Charger When No Battery is Present n No External MOSFET, Sense Resistor or Blocking Diode Needed n Thermal Regulation Maximizes Charge Rate Without Risk of Overheating* n Preset Charge Voltage with ±0.6% Accuracy n Programmable Charge Current Termination n 40μA USB Suspend Current in Shutdown n Charge Status Output n Automatic Recharge n Available Without Trickle Charge (LTC4078X) n Available in a Thermally Enhanced, Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package n Cellular Telephones n Handheld Computers n Portable MP3 Players n Digital Cameras High Voltage Dual Input Battery Charger for Li-Ion Battery Pack Charger Current vs Supply Voltage L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. Patents including 6522118, 6700364. TYPICAL APPLICATION LTC4078 DCIN USBIN IUSB IDC BAT ITERM BATDET 1.24k 1% 3.9k 2k 1% 2k 1% WALL ADAPTER USB PORT 1μF 1μF + 4.2V Li-Ion BATTERY PACK 800mA (WALL) 500mA (USB) 4078X TA01 GND SUPPLY VOLTAGE (V) 2 900 800 700 600 500 400 300 200 100 0 19 345678 20 4078x TA01b RIDC = 1.24k RIUSB = 2k VBAT = 3.5V VBATDET = 0V CHARGE FROM DCIN CHARGE FROM USBIN |
Similar Part No. - LTC4078_15 |
|
Similar Description - LTC4078_15 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |