Battery Back-Up System Manager offers multimodal operation.
June 23, 2008 -
Supporting multiple battery chemistries, LTC4110 combines 4 operating modes - battery backup, battery charge, no-loss battery calibration, shutdown - in 5 x 7 x 0.75 mm QFN package. IC can provide supply voltage to system load from main supply or battery and can also charge battery, providing uninterruptible power source for system. Ability to supply voltages above or below input supply rail lets designer optimize battery configuration independent of input supply considerations.
Battery Back-Up System Manager Saves Space & Power & Offers Battery Backup Charge, No-Loss Calibration & Shutdown Modes
MILPITAS, CA - May 28, 2008 - Linear Corporation introduces the LTC4110, an autonomous multi-chemistry, single chip, high efficiency flyback battery charge and discharge manager for server, memory backup, medical equipment, and high reliability system applications. The LTC4110 features four operating modes: battery backup, battery charge, "no-loss" battery calibration and shutdown. Combining all these in a single IC saves significant board area compared to existing solutions.
The LTC4110 can provide a supply voltage to a system load from a main supply or battery and can also charge a battery, thereby providing an uninterruptible power source for the system. The IC is capable of supplying voltages above or below the input supply rail, allowing the designer to optimize the battery configuration independent of input supply considerations. When the main supply is present, the LTC4110's PowerPath(TM) control feature provides power to the system load and, if needed, preferentially and simultaneously charges the battery. If the main supply fails, the LTC4110 uses the battery as a power source through low loss switches to continue providing a supply voltage to power the system. The low loss battery calibration mode discharges the battery (through a high efficiency flyback converter) into the system load, thus eliminating wasted heat and energy. Shutdown mode disconnects the battery from the load to preserve capacity. In addition it offers the ability to ship the end product with a fully charged battery with minimal drainage.
The LTC4110 supports multiple battery chemistries: Li-Ion/Polymer, Nickel and lead acid, and is compatible with supercapacitors. Multiple LTC4110s can be combined to form a redundant battery backup system or increase the number of battery packs to achieve longer backup run times. The IC provides support for both standard and Smart Battery packs. If the optional SMBus/I2C interface is used, the host may access internal status, control the 3 GPIO pins as desired, and support battery capacity and gas gauge calibration to verify the battery's ability to support the load. The GPIO pins can also be configured as status outputs on power up.
Other features of the LTC4110 include programmable charge/calibration current up to 3A with ±3% accuracy, wide backup battery supply range of 2.7V to 19V, wide input supply range of 4.5V to 19V, over- and under-battery voltage protection, adjustable battery float voltage with precision charge voltage of ±0.5%, and optional temperature-qualified charging with a thermistor input. A "no-heat" calibration state is provided to assure the battery is maintaining charge. During this calibration state, the energy from the battery is sourced to the load rather than being dissipated as heat.
The LTC4110 is housed in a low-profile (0.75mm) 38-pin 5mm x 7mm QFN package and is guaranteed for operation from -40°C to 85°C. 1,000-piece pricing starts at 9.25 each.
Summary of Features: LTC4110
Supports Li-Ion/Polymer, Lead Acid, NiMH/NiCd Batteries and Super Capacitors
Standalone for Li-Ion, SLA, and SuperCaps
Optional Smart Battery Support
Automatic PowerPath Control
Charge and Discharge Battery Voltage Can Extend Above or Below Input Supply Voltage
Over- and Under-Battery Voltage Protection
Adjustable Battery Float Voltage
Optional SMBus/I2C Support Allows Battery Capacity
Calibration Operation with Host
"No Heat" Battery Calibration
Precision Charge Voltage: ±0.5%
Programmable Charge/Calibration Current: Up to 3A with ±3% Accuracy
Optional Temperature Qualified Charging
Wide Backup Battery Supply Range: 2.7V to 19V
Wide Input Supply Range: 4.5V to 19V
Low-Profile (0.75mm) 38-Lead (5mm Ã- 7mm) QFN Package
Battery Backup System Manager for Multi-Chemistry Batteries & SuperCaps
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. 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, uModule(TM) products, 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. For more information, visit www.linear.com.
LT, LTC and LTM are registered trademarks and uModule and Power Path are trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Marketing:
Doug Dickinson
USA
Phone: 408-432 1900 ext 2233 E-mail this person
General Information:
John Hamburger
USA
Phone: 408-432-1900 ext 2419 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
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