Sub 1-uA IQ battery charger provides pack protection
October 22, 2010 // Paul Buckley
Linear Technology Corporation has introduced an easy-to-use, shunt battery system for Li-Ion/Polymer batteries that integrates a charger and battery pack protection in one IC. The LTC4071, with its 550 nA operating current, charges and protects batteries from previously unusable low current, intermittent or continuous charging sources.
The LTC4071 can charge at currents up to 50 mA. A near zero current (<0.1 nA) low battery latching disconnect function protects even low capacity batteries from deep discharge and potentially irreparable damage.
Housed in a low profile (0.75 mm) 8-lead 2 mm x 3 mm DFN package, the LTC4071 provides the only complete and ultra-compact battery charger and protection solution operating with low level power sources. The device's feature set is well suited for high impedance, lower power charging source applications, such as energy scavenging/harvesting, resistive isolation or solar-powered systems. The device can chargeLi-Ion/Polymer, coin cell and thin film batteries.
With pin-selectable settings of 4.0 V, 4.1 V, or 4.2 V, the LTC4071's 1% accurate battery float voltage allows the user to optimize the balance between battery capacity and lifetime. An independent high battery supervisory status output indicates a near-fully charged battery. The internal thermal battery conditioner reduces the float voltage to protect Li-Ion/Polymer cells at elevated battery temperatures. Multiple-cell battery stacks can be charged and balanced by configuring several LTC4071 ICs in series.
Availability and Pricing
In addition to its compact 2 mm x 3 mm 8-lead DFN package, the LTC4071 is offered in an 8-lead MSOP package. The devices are rated for operation from -40 to 125 degrees C. 1,000 piece quantity pricing is $2.20 and $2.30 for the E grade in the DFN & MSOP packages respectively, and $2.53 and $2.65 for the I grade in DFN & MSOP respectively.
More information about the LTC4071 new shunt battery system at
Visit Linear Technology at www.linear.com
Mobile display revenues soar, leaving TV behind
April 17, 2014
Increasing demand for mobile displays, and greater demand for higher resolution and lower power consumption lead to a shift ...
European organic PV project aims for material gains
Nanomaterial-packed cathode extends range of EV lithium-sulfur batteries
Wearable computing market on 78% CAGR through 2018
OLED TV shipment delays stall OLED material growth
BMW updates navigation via mobile radio connection
April 17, 2014
Carmaker BMW has announced online updates for road maps stored in the automotive navigation system. The move could be a step ...
Ford pickups unveil first LED forward lighting solution
BMW has most advanced connectivity, study says
Google locks future wearable IP with smart lens patents
- USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation
- Measurement applications across multiple test platforms
- Supplying DC input power to string inverters
- Supplying DC input power for HEV testing
InterviewHeartbleed challenges the Internet of Thing
The Heartbleed security bug is a key example of the fundamental security challenge for the Internet of Things says Green Hills Software as it launches a new security group.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Arrow Electronics is giving away ten XMC1200 lighting application kits, worth 100 Euros each, for EETimes Europe's readers to win.
Each kit combines Infineon’s brightness and colour control XMC1200 CPU board to drive flicker free LED dimming and colour changing, together with a colour LED card and a white LED card.
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.