Milpitas, California – December 10, 2009
MILPITAS, CA – December 10, 2009 – Linear Technology announces the LTC
6801, a high voltage battery stack fault monitor that operates without a microprocessor, and without the need for optocouplers or isolators. An LTC6801IG#PBFLTC6801IG#PBF can monitor up to 12 series-connected battery cells for overvoltage and undervoltage conditions. Multiple LTC6801IG#PBFLTC6801IG#PBF devices can be daisy chained, providing a method to monitor each individual cell in very long battery strings. When connected in a daisy-chain, a single differential clock output confirms that all cells in the stack are within the defined operating range. This clock interface provides high noise immunity and ensures that fault conditions are not hidden by frozen bits or short circuit conditions. The result is a reliable and simple design that can serve as a complete monitoring or redundant circuit. The LTC6801IG#PBFLTC6801IG#PBF is a low cost companion to the LTC6802 precision battery measurement and cell balancing IC, providing a backup circuit for hybrid electric battery packs, battery backup systems, and other high powered Li-Ion battery systems.
A wide range of overvoltage and undervoltage thresholds can be set via pin connections and the LTC6801IG#PBFLTC6801IG#PBF offers selectable threshold hysteresis and adjustable update rates. The LTC6801IG#PBFLTC6801IG#PBF is fully specified for operation from -40°C to 85°C and two temperature sensor inputs are monitored for over-temperature faults.
“The LTC6801IG#PBFLTC6801IG#PBF incorporates a number of important reliability features, including a comprehensive self-test to guarantee accuracy,” stated Mike Kultgen, design manager for Linear Technology. “These features will prove invaluable for high reliability battery management systems.”
Samples, demonstration boards and the data sheet for the LTC6801IG#PBFLTC6801IG#PBF are now available. Prices start at $4.48 each in 1,000-piece quantities. The product will be available in production quantities in the first calendar quarter 2010. For more information, visit www.linear.com.
Summary of Features: LTC6801
- Monitors 4 to 12 Li-Ion Cells in Series (60V Max)
- Adjustable Overvoltage and Undervoltage Levels
- Stackable Architecture Enables 1000V+ Systems
- Operates without a Microcontroller
- Robust Fault Detection and Interface
- 2 Temperature Monitor Inputs
- Built-in Comprehensive Self-Test
- Built-in Precision 3V Reference and 5V Regulator
- Fully Specified for Operation from -40°C to 85°C
- 36-lead SSOP Package