Battery Charger supports multi-year back-up applications.
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Press Release Summary:
Model LTC4064, housed in 5 x 3 mm footprint 10-lead MSOP package, charges to float voltage of 4 V to slow battery aging and capacity degradation during periods of non-use. Unit autonomously performs charging, pre-conditioning, charge termination, re-charging, temperature monitoring, and fault detection. Thermal regulation allows maximum charge current without risk of overheating, while external capacitor programs safety timer to terminate charge cycle.
Original Press Release:
Li-Ion Battery Charger Supports Multi-Year Back-Up Applications
MILPITAS, CA - September 22, 2003 - Linear Technology Corporation introduces the LTC4064, a standalone linear charger optimized for prolonging the life of 1-cell Li-Ion batteries in battery back-up applications. By charging to a float voltage of 4V instead of 4.1V or 4.2V, the LTC4064 slows battery aging and capacity degradation when the battery is unused but must remain fully charged for long periods of time. This approach impedes the cell corrosion that naturally takes place within a battery when on continuous charge. The primary application is in industrial systems such as RAID servers where a 1-cell Li-Ion is used as a back-up power supply and may need for three years or more.
The LTC4064 is housed in a 5mm x 3mm footprint 10-lead MSOP package and requires no external MOSFETs, sense resistor or reverse current blocking diode. The IC limits battery drain current to only 1uA during standby and shutdown modes. As a standalone charger, the LTC4064 requires no microcontroller interface and autonomously performs charging, pre-conditioning, charge termination, re-charging, temperature monitoring and fault detection. Patented thermal regulation allows maximum charge current without the risk of overheating by maintaining constant power dissipation regardless of ambient conditions. Moreover, an external capacitor programs a safety timer to terminate the charge cycle while the charge current is set externally with a resistor. The LTC4064 includes a charge current monitor output voltage that can be used for gas gauging.
Pricing for the LTC4064 starts at $1.85 each in 1,000-piece quantities.
Summary of Features: LTC4064
Preset 4V Charge Voltage with 1% Accuracy Prolongs Li-Ion Battery Lifetime
Automatic Recharge
Thermal Regulation Maximizes Charging Rate without Risk of Overheating
No MOSFET, Sense Resistor or Blocking Diode Required
Programmable Charge Termination Timer
C/10 Charge Current Detection Output
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
Note: LT, AND LTC are registered trademarks of Linear Technology Corp.
