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
Structural electronics - the next big thing in smart cars?
September 18, 2014
Electronic circuits embedded in vehicles, aircraft and more have the potential to be a $60 billion market by 2025, says technology ...
Elastomeric camouflage switches texture and colour
Solar microinverter to break USD1bn barrier in 2018
7nm EUV could ease 10nm squeeze, says ASML
Europeans flex skills to commercialize OLED and OPV devices
Freescale opens Discovery Lab in Toulouse to foster innovation
September 17, 2014
Shortly after the company celebrated the first year of existence of its Austin-based Freescale Discovery Lab, an incubator ...
Can a large-area flexible OLED have reliable contacts?
Lemoptix pico-projector excels
Building ARM-based Bluetooth-enabled wearables
- Putting FPGAs to Work in Software Radio Systems Handbook
- Flexible and Low Power Driving of Solenoid Coils
- How to Protect & Monetize Android Apps
- Power Modules: The New Super Power
InterviewCEO interview: AMS' Laney on driving a sensor-driven business
Kirk Laney, CEO of Austrian mixed-signal chip and sensor company AMS, wants to leverage the opportunity that technology affords to create new markets for sensors and sensor interfaces.
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, Trinamic Motion Control is offering you to win one of four TMCM-1043 development kits for its highly integrated, NEMA 17-compatible TMCM-1043 stepDancer stepper motor module.
Offering designers an easy-to-use PC-based GUI that allows one-click modification of motor drive current, micro-stepping and other key parameters, the intuitive kits are custom designed and developed for...MORE INFO AND LAST MONTH' WINNERS...
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.