Archive News Story
(Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Li-Ion Battery Chargers select between USB or AC adapter.
May 23, 2005 - Standalone LTC4075 and LTC4075X charge single-cell Li-Ion batteries from wall adapter and USB sources. Using constant-current/constant-voltage algorithm, products deliver up to 950 mA charge current from wall adapter supply or 500 mA from USB supply while automatically sensing presence of voltage at each input. Model LTC4075X disables trickle charge function, and both models are equipped with thermal regulation scheme that maximizes charging rate without risk of overheating.
Archive Press Release
(Products mentioned in this Archive Press Release may or may not be available from the manufacturer.)
Release date: May 9, 2005
950mA Li-Ion Battery Chargers Automatically Select Between USB or AC Adapter
Milpitas, CA - May 9, 2005 - Linear Technology Corporation introduces the LTC4075 and LTC4075X, standalone dual-input linear battery chargers that efficiently manage charging single-cell Li-Ion batteries from two separate power sources: a wall adapter and USB. Using a constant-current/constant-voltage algorithm, the chargers can deliver up to 950mA of charge current from a wall adapter supply, or up to 500mA of charge current from a USB supply while automatically sensing the presence of voltage at each input. The final float voltage accuracy is ±0.6% in either case. The LTC4075X disables the trickle charge function, benefiting systems requiring more charge current during low battery conditions. Applications include PDAs, MP3 players, lightweight portable medical and test equipment and large color screen cell phones.
The LTC4075/X is equipped with a patented thermal regulation scheme, which maximizes the charging rate without the risk of overheating. The device is extremely flexible as each of the following is programmable via a single resistor: wall adapter supply charge current, USB supply charge current and charge termination current. As a standalone charger, it also features trickle charge for battery pre-conditioning, undervoltage lockout, automatic recharge, a charge status indicator, and “power present” status outputs to indicate the presence of wall adapter or USB power.
The LTC4075/X is offered in a low profile (0.75mm) 10-lead 3mm x 3mm DFN package. The total solution footprint is less than 25mm2 since no external MOSFET, sense resistor or blocking diode are required. To preserve battery energy, the LTC4075 draws <6uA from the battery terminal in standby and <2uA in shutdown mode.
The LTC4075/X is rated for operation from -40°C to 85°C. 1,000-piece pricing for the LTC4075/XEDD begins at $1.88 each.
Summary of Features: LTC4075
Charges Single Cell Li-Ion Batteries from Wall Adapter & USB Inputs
Automatic Input Power Detection & Selection
Programmable Charge Current up to 950mA from Wall Adapter Input
Standalone Charger in Low-Profile (0.75mm) 10-Lead 3mm x 3mm DFN Package
Thermal Regulation Maximizes Charge Rate without Risk of Overheating
No MOSFET, Sense Resistor or Blocking Diode Required
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
LT and LTC are registered trademarks of Linear Technology Corp.
Worldwide Contacts
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
Contacts:
Marketing:
John Hamburger
USA
Phone: 408-432-1900 ext 2419 E-mail this person
General Information:
Doug Dickinson Media Relations Manager
USA
Phone: 408-432-1900 ext 2233 E-mail this person Company Information: Name: Linear Technology Corp. Address: 1630 McCarthy Blvd. City: Milpitas State: CA ZIP: 95035-7417 Country: USA Phone: 408-432-1900 FAX: 408-434-6441 http://www.linear-tech.com
News provided by ThomasNet Industrial Newsroom® (TIN). TIN is a comprehensive source
of new and timely product information in the industrial marketplace. TIN supplies new product
information to the web sites, e-marketplaces and print publications that serve the
industrial marketplace. For press release submissions please go to
http://www.productnews.com/SubmitPRPage.html.
BY ACCESSING, BROWSING AND/OR USING THIS WEB SITE AND/OR ANY WEB SITES PROVIDED BY
ProductNews.com, YOU AGREE TO BE BOUND BY THE TERMS OF USE
AGREEMENT.
![[Get Copyright Permissions]](http://license.icopyright.net/images/icopy-w.gif){kind=small}
