Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC4001
Edited by the Electronicstalk Editorial
Team on 24 August 2006
Charger chip stands alone with single
cells
High efficiency switch-mode battery charger for single-cell 4.2V Li-ion/Li-polymer batteries minimises heat dissipation without compromising board space.
Linear Technology has introduced the LTC4001, a 2A capable, high efficiency switch-mode battery charger for single-cell 4.2V Li-ion/Li-polymer batteries that minimises heat dissipation without compromising board space Stand-alone operation eliminates the need for an external microprocessor for charge termination
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
Related stories
Card power chip meets smart and SIM standards
The LTC4557 is a dual SIM/smart-card power supply and level translator, which provides both 1.8 and 3V SIM power and digital signal level shifting from a 3 x 3mm QFN package.
RF mixers take transformers onboard
Linear Technology has released two new high linearity up-converting RF active mixers with integrated RF transformers.
For safety and autonomous charge control, the LTC4001 includes features such as automatic shutdown, battery preconditioning, a thermistor input for temperature-qualified charging, remote sensing, end-of-charge indication and a programmable charge termination timer.
The device is intended for 5V wall adapter input power and is suited for applications including handheld medical devices, handheld computers, charging docks and cradles, digital cameras and smart phones.
It may also be used with current limited wall adapters for even further reduction in power dissipation.
The LTC4001's synchronously rectified, buck switching topology enables efficiencies as high as 90% at 1.5A.
Final float voltage accuracy is specified at 1% with charge current accuracy of 10%.
The LTC4001's high operating frequency of 1.5MHz and current mode architecture allow the use of small inductors and capacitors, minimising noise and filtering needs.
The LTC4001 automatically enters sleep mode, dropping the battery drain current to 5uA and increasing battery run time.
The LTC4001 is housed in a compact 16-lead, low-profile (0.75mm) 4 x 4mm QFN package.
It is guaranteed for operation from -40 to +85C.
Pricing starts at $2.20 each in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
• Linear Technology Corp: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
