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
"New" MEMS evolution coming, predicts Yole
October 20, 2014
A change is occurring in the technology options behind MEMS sensors, according to Yole Developpement.
TSMC Capex to exceed $10B in FinFET ramp-up
Supercomputer simulations point path to better Mg-ion batteries
Simpler circuit design unlocks power of superconducting devices
Analog IC sales to hit $43 billion in 2014, says Semico
Network testing via smartphone
October 17, 2014
The RANAdvisor Handheld multi-technology radio access network (RAN) analysis solution from JDSU helps wireless network professionals ...
Breakthrough for drive batteries? Ultra-fast battery charges in 2 minutes
When the steering wheel is a computer
Bluetooth beacons nowhere precise enough, says BeSpoon
- 5 Best Practices for Designing Flexible Test Stations
- Intelligent PLCs Expand the Internet of Things
- Solutions for Millimeter Wave Wireless Backhaul
- Enter Linduino
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, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...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.